./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-two-queue.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-two-queue.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R --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 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 17:47:03,255 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:47:03,258 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:47:03,280 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:47:03,280 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:47:03,281 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:47:03,283 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:47:03,285 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:47:03,286 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:47:03,287 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:47:03,288 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:47:03,290 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:47:03,290 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:47:03,291 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:47:03,293 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:47:03,294 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:47:03,295 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:47:03,296 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:47:03,298 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:47:03,300 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:47:03,302 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:47:03,303 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:47:03,305 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:47:03,306 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:47:03,312 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:47:03,313 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:47:03,313 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:47:03,314 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:47:03,315 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:47:03,316 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:47:03,316 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:47:03,317 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:47:03,318 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:47:03,330 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:47:03,331 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:47:03,331 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:47:03,332 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:47:03,333 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:47:03,333 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:47:03,334 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:47:03,335 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:47:03,338 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-25 17:47:03,375 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:47:03,375 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:47:03,376 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:47:03,376 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:47:03,377 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:47:03,378 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:47:03,379 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:47:03,379 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:47:03,379 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:47:03,380 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:47:03,380 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:47:03,381 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 17:47:03,381 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:47:03,381 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:47:03,382 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:47:03,382 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 17:47:03,382 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:47:03,383 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 17:47:03,383 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-25 17:47:03,383 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:47:03,384 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 17:47:03,384 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:47:03,384 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 17:47:03,385 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:47:03,385 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:47:03,385 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:47:03,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:47:03,386 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:47:03,386 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:47:03,387 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 17:47:03,387 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:47:03,387 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:47:03,388 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:47:03,388 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 17:47:03,388 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:47:03,388 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:47:03,389 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2173db9a2274c43e93688b39a8ab5256e9054c31e7330b4f58c34c545dbb4480 [2022-11-25 17:47:03,811 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:47:03,846 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:47:03,849 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:47:03,851 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:47:03,852 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:47:03,853 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-two-queue.wvr.c [2022-11-25 17:47:06,979 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:47:07,192 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:47:07,193 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/sv-benchmarks/c/weaver/popl20-two-queue.wvr.c [2022-11-25 17:47:07,201 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/data/df5b0b047/f85932bacc5b48f3ab13b3951e3d7883/FLAG8ef974364 [2022-11-25 17:47:07,225 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/data/df5b0b047/f85932bacc5b48f3ab13b3951e3d7883 [2022-11-25 17:47:07,232 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:47:07,233 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:47:07,241 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:47:07,241 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:47:07,250 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:47:07,251 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:47:07" (1/1) ... [2022-11-25 17:47:07,252 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9468d8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:47:07, skipping insertion in model container [2022-11-25 17:47:07,253 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:47:07" (1/1) ... [2022-11-25 17:47:07,261 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:47:07,296 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:47:07,576 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:47:07,585 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:47:07,585 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:47:07,587 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:47:07,591 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:47:07,594 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:47:07,594 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:47:07,597 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:47:07,606 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/sv-benchmarks/c/weaver/popl20-two-queue.wvr.c[2987,3000] [2022-11-25 17:47:07,612 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:47:07,630 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:47:07,650 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:47:07,655 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:47:07,655 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:47:07,657 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:47:07,658 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:47:07,659 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:47:07,660 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:47:07,661 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:47:07,672 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/sv-benchmarks/c/weaver/popl20-two-queue.wvr.c[2987,3000] [2022-11-25 17:47:07,675 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:47:07,693 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:47:07,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:47:07 WrapperNode [2022-11-25 17:47:07,694 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:47:07,696 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:47:07,697 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:47:07,702 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:47:07,711 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:47:07" (1/1) ... [2022-11-25 17:47:07,741 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:47:07" (1/1) ... [2022-11-25 17:47:07,770 INFO L138 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 216 [2022-11-25 17:47:07,775 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:47:07,776 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:47:07,776 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:47:07,776 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:47:07,786 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:47:07" (1/1) ... [2022-11-25 17:47:07,787 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:47:07" (1/1) ... [2022-11-25 17:47:07,790 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:47:07" (1/1) ... [2022-11-25 17:47:07,790 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:47:07" (1/1) ... [2022-11-25 17:47:07,798 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:47:07" (1/1) ... [2022-11-25 17:47:07,803 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:47:07" (1/1) ... [2022-11-25 17:47:07,805 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:47:07" (1/1) ... [2022-11-25 17:47:07,806 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:47:07" (1/1) ... [2022-11-25 17:47:07,810 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:47:07,811 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:47:07,811 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:47:07,811 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:47:07,812 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:47:07" (1/1) ... [2022-11-25 17:47:07,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:47:07,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:47:07,855 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:47:07,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:47:07,898 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:47:07,898 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 17:47:07,898 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 17:47:07,898 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 17:47:07,898 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 17:47:07,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:47:07,899 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:47:07,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:47:07,899 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 17:47:07,899 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 17:47:07,899 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 17:47:07,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:47:07,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:47:07,900 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 17:47:07,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:47:07,902 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 17:47:08,005 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:47:08,007 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:47:08,588 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:47:08,831 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:47:08,831 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-25 17:47:08,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:47:08 BoogieIcfgContainer [2022-11-25 17:47:08,834 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:47:08,839 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:47:08,839 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:47:08,842 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:47:08,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:47:07" (1/3) ... [2022-11-25 17:47:08,844 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ab5f835 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:47:08, skipping insertion in model container [2022-11-25 17:47:08,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:47:07" (2/3) ... [2022-11-25 17:47:08,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ab5f835 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:47:08, skipping insertion in model container [2022-11-25 17:47:08,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:47:08" (3/3) ... [2022-11-25 17:47:08,849 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-two-queue.wvr.c [2022-11-25 17:47:08,859 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 17:47:08,871 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:47:08,871 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2022-11-25 17:47:08,872 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:47:08,983 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 17:47:09,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 201 transitions, 418 flow [2022-11-25 17:47:09,113 INFO L130 PetriNetUnfolder]: 13/199 cut-off events. [2022-11-25 17:47:09,113 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:47:09,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208 conditions, 199 events. 13/199 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 161 event pairs, 0 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 157. Up to 2 conditions per place. [2022-11-25 17:47:09,119 INFO L82 GeneralOperation]: Start removeDead. Operand has 195 places, 201 transitions, 418 flow [2022-11-25 17:47:09,125 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 175 places, 180 transitions, 369 flow [2022-11-25 17:47:09,129 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:47:09,143 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 175 places, 180 transitions, 369 flow [2022-11-25 17:47:09,146 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 175 places, 180 transitions, 369 flow [2022-11-25 17:47:09,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 180 transitions, 369 flow [2022-11-25 17:47:09,195 INFO L130 PetriNetUnfolder]: 12/180 cut-off events. [2022-11-25 17:47:09,195 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 17:47:09,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 180 events. 12/180 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 157 event pairs, 0 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 157. Up to 2 conditions per place. [2022-11-25 17:47:09,198 INFO L119 LiptonReduction]: Number of co-enabled transitions 1188 [2022-11-25 17:47:18,782 INFO L134 LiptonReduction]: Checked pairs total: 2703 [2022-11-25 17:47:18,782 INFO L136 LiptonReduction]: Total number of compositions: 194 [2022-11-25 17:47:18,798 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:47:18,805 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;@2f1d1ccc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:47:18,805 INFO L358 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2022-11-25 17:47:18,809 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-11-25 17:47:18,809 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:47:18,809 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:18,810 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:47:18,811 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-25 17:47:18,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:18,816 INFO L85 PathProgramCache]: Analyzing trace with hash 28850, now seen corresponding path program 1 times [2022-11-25 17:47:18,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:18,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360254352] [2022-11-25 17:47:18,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:18,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:18,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:19,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:47:19,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:19,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360254352] [2022-11-25 17:47:19,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360254352] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:19,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:19,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:47:19,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983834767] [2022-11-25 17:47:19,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:19,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:47:19,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:19,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:47:19,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:47:19,212 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 395 [2022-11-25 17:47:19,215 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 33 transitions, 75 flow. Second operand has 3 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) [2022-11-25 17:47:19,216 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:19,216 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 395 [2022-11-25 17:47:19,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:19,545 INFO L130 PetriNetUnfolder]: 355/617 cut-off events. [2022-11-25 17:47:19,545 INFO L131 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2022-11-25 17:47:19,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1284 conditions, 617 events. 355/617 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 2697 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. [2022-11-25 17:47:19,552 INFO L137 encePairwiseOnDemand]: 383/395 looper letters, 49 selfloop transitions, 4 changer transitions 0/53 dead transitions. [2022-11-25 17:47:19,552 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 53 transitions, 230 flow [2022-11-25 17:47:19,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:47:19,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:47:19,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 572 transitions. [2022-11-25 17:47:19,580 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48270042194092827 [2022-11-25 17:47:19,582 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 572 transitions. [2022-11-25 17:47:19,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 572 transitions. [2022-11-25 17:47:19,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:19,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 572 transitions. [2022-11-25 17:47:19,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:19,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:19,614 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:19,616 INFO L175 Difference]: Start difference. First operand has 36 places, 33 transitions, 75 flow. Second operand 3 states and 572 transitions. [2022-11-25 17:47:19,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 53 transitions, 230 flow [2022-11-25 17:47:19,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 53 transitions, 220 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 17:47:19,628 INFO L231 Difference]: Finished difference. Result has 33 places, 32 transitions, 98 flow [2022-11-25 17:47:19,630 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, 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} [2022-11-25 17:47:19,642 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, -3 predicate places. [2022-11-25 17:47:19,642 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 32 transitions, 98 flow [2022-11-25 17:47:19,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2022-11-25 17:47:19,643 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:19,643 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 17:47:19,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:47:19,644 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-25 17:47:19,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:19,656 INFO L85 PathProgramCache]: Analyzing trace with hash 895982, now seen corresponding path program 1 times [2022-11-25 17:47:19,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:19,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81060295] [2022-11-25 17:47:19,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:19,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:19,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:19,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:47:19,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:19,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81060295] [2022-11-25 17:47:19,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81060295] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:47:19,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607457276] [2022-11-25 17:47:19,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:19,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:47:19,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:47:19,782 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:47:19,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:47:19,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:19,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:47:19,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:47:19,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:47:19,911 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:47:19,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607457276] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:19,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:47:19,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2022-11-25 17:47:19,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089643344] [2022-11-25 17:47:19,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:19,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:47:19,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:19,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:47:19,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:47:19,954 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 395 [2022-11-25 17:47:19,955 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 32 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 169.75) internal successors, (679), 4 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:19,955 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:19,955 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 395 [2022-11-25 17:47:19,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:20,211 INFO L130 PetriNetUnfolder]: 355/615 cut-off events. [2022-11-25 17:47:20,212 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-25 17:47:20,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1277 conditions, 615 events. 355/615 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 2758 event pairs, 288 based on Foata normal form. 0/293 useless extension candidates. Maximal degree in co-relation 627. Up to 309 conditions per place. [2022-11-25 17:47:20,219 INFO L137 encePairwiseOnDemand]: 389/395 looper letters, 47 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2022-11-25 17:47:20,219 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 51 transitions, 238 flow [2022-11-25 17:47:20,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:47:20,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:47:20,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 729 transitions. [2022-11-25 17:47:20,222 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46139240506329116 [2022-11-25 17:47:20,223 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 729 transitions. [2022-11-25 17:47:20,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 729 transitions. [2022-11-25 17:47:20,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:20,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 729 transitions. [2022-11-25 17:47:20,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 182.25) internal successors, (729), 4 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:20,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 395.0) internal successors, (1975), 5 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:20,231 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 395.0) internal successors, (1975), 5 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:20,231 INFO L175 Difference]: Start difference. First operand has 33 places, 32 transitions, 98 flow. Second operand 4 states and 729 transitions. [2022-11-25 17:47:20,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 51 transitions, 238 flow [2022-11-25 17:47:20,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 51 transitions, 230 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:47:20,234 INFO L231 Difference]: Finished difference. Result has 32 places, 30 transitions, 90 flow [2022-11-25 17:47:20,234 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=90, PETRI_PLACES=32, PETRI_TRANSITIONS=30} [2022-11-25 17:47:20,236 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, -4 predicate places. [2022-11-25 17:47:20,236 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 30 transitions, 90 flow [2022-11-25 17:47:20,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 169.75) internal successors, (679), 4 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:20,237 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:20,237 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 17:47:20,248 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 17:47:20,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:47:20,443 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-25 17:47:20,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:20,445 INFO L85 PathProgramCache]: Analyzing trace with hash 896007, now seen corresponding path program 1 times [2022-11-25 17:47:20,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:20,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504559325] [2022-11-25 17:47:20,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:20,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:20,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:20,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:47:20,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:20,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504559325] [2022-11-25 17:47:20,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504559325] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:47:20,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519564321] [2022-11-25 17:47:20,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:20,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:47:20,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:47:20,570 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:47:20,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:47:20,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:20,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:47:20,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:47:20,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:47:20,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:47:20,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:47:20,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519564321] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:47:20,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:47:20,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-11-25 17:47:20,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430229035] [2022-11-25 17:47:20,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:47:20,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:47:20,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:20,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:47:20,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:47:20,749 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 395 [2022-11-25 17:47:20,751 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 90 flow. Second operand has 7 states, 7 states have (on average 170.14285714285714) internal successors, (1191), 7 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:20,752 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:20,752 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 395 [2022-11-25 17:47:20,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:21,237 INFO L130 PetriNetUnfolder]: 886/1533 cut-off events. [2022-11-25 17:47:21,237 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-25 17:47:21,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3170 conditions, 1533 events. 886/1533 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 8269 event pairs, 720 based on Foata normal form. 0/731 useless extension candidates. Maximal degree in co-relation 2499. Up to 310 conditions per place. [2022-11-25 17:47:21,247 INFO L137 encePairwiseOnDemand]: 389/395 looper letters, 110 selfloop transitions, 13 changer transitions 0/123 dead transitions. [2022-11-25 17:47:21,247 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 123 transitions, 562 flow [2022-11-25 17:47:21,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:47:21,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:47:21,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1143 transitions. [2022-11-25 17:47:21,252 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48227848101265824 [2022-11-25 17:47:21,252 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1143 transitions. [2022-11-25 17:47:21,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1143 transitions. [2022-11-25 17:47:21,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:21,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1143 transitions. [2022-11-25 17:47:21,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 190.5) internal successors, (1143), 6 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:21,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 395.0) internal successors, (2765), 7 states have internal predecessors, (2765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:21,263 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 395.0) internal successors, (2765), 7 states have internal predecessors, (2765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:21,263 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 90 flow. Second operand 6 states and 1143 transitions. [2022-11-25 17:47:21,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 123 transitions, 562 flow [2022-11-25 17:47:21,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 123 transitions, 554 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:47:21,266 INFO L231 Difference]: Finished difference. Result has 38 places, 39 transitions, 181 flow [2022-11-25 17:47:21,266 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=85, 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=181, PETRI_PLACES=38, PETRI_TRANSITIONS=39} [2022-11-25 17:47:21,268 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 2 predicate places. [2022-11-25 17:47:21,268 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 39 transitions, 181 flow [2022-11-25 17:47:21,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 170.14285714285714) internal successors, (1191), 7 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:21,269 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:21,269 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:47:21,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:47:21,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:47:21,475 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-25 17:47:21,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:21,475 INFO L85 PathProgramCache]: Analyzing trace with hash 861656245, now seen corresponding path program 1 times [2022-11-25 17:47:21,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:21,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006043481] [2022-11-25 17:47:21,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:21,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:21,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:21,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:47:21,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:21,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006043481] [2022-11-25 17:47:21,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006043481] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:21,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:21,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:47:21,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739137190] [2022-11-25 17:47:21,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:21,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:47:21,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:21,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:47:21,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:47:21,697 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 395 [2022-11-25 17:47:21,698 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 39 transitions, 181 flow. Second operand has 4 states, 4 states have (on average 166.25) internal successors, (665), 4 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:21,698 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:21,698 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 395 [2022-11-25 17:47:21,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:21,998 INFO L130 PetriNetUnfolder]: 731/1280 cut-off events. [2022-11-25 17:47:21,998 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-11-25 17:47:22,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2682 conditions, 1280 events. 731/1280 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 6755 event pairs, 597 based on Foata normal form. 6/634 useless extension candidates. Maximal degree in co-relation 2509. Up to 1226 conditions per place. [2022-11-25 17:47:22,007 INFO L137 encePairwiseOnDemand]: 386/395 looper letters, 41 selfloop transitions, 7 changer transitions 2/50 dead transitions. [2022-11-25 17:47:22,007 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 50 transitions, 307 flow [2022-11-25 17:47:22,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:47:22,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:47:22,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 705 transitions. [2022-11-25 17:47:22,010 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4462025316455696 [2022-11-25 17:47:22,011 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 705 transitions. [2022-11-25 17:47:22,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 705 transitions. [2022-11-25 17:47:22,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:22,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 705 transitions. [2022-11-25 17:47:22,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 176.25) internal successors, (705), 4 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:22,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 395.0) internal successors, (1975), 5 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:22,019 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 395.0) internal successors, (1975), 5 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:22,019 INFO L175 Difference]: Start difference. First operand has 38 places, 39 transitions, 181 flow. Second operand 4 states and 705 transitions. [2022-11-25 17:47:22,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 50 transitions, 307 flow [2022-11-25 17:47:22,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 50 transitions, 288 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-25 17:47:22,024 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 200 flow [2022-11-25 17:47:22,024 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=162, 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=200, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2022-11-25 17:47:22,026 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 6 predicate places. [2022-11-25 17:47:22,026 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 200 flow [2022-11-25 17:47:22,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 166.25) internal successors, (665), 4 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:22,027 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:22,027 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-11-25 17:47:22,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 17:47:22,028 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-25 17:47:22,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:22,028 INFO L85 PathProgramCache]: Analyzing trace with hash 924016587, now seen corresponding path program 2 times [2022-11-25 17:47:22,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:22,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321174240] [2022-11-25 17:47:22,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:22,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:22,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:22,164 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:47:22,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:22,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321174240] [2022-11-25 17:47:22,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321174240] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:47:22,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088357337] [2022-11-25 17:47:22,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:47:22,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:47:22,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:47:22,171 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:47:22,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 17:47:22,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 17:47:22,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:47:22,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 17:47:22,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:47:22,277 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 17:47:22,278 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:47:22,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088357337] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:22,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:47:22,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2022-11-25 17:47:22,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100278995] [2022-11-25 17:47:22,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:22,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:47:22,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:22,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:47:22,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:47:22,308 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 395 [2022-11-25 17:47:22,309 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 200 flow. Second operand has 3 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) [2022-11-25 17:47:22,310 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:22,310 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 395 [2022-11-25 17:47:22,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:22,557 INFO L130 PetriNetUnfolder]: 731/1279 cut-off events. [2022-11-25 17:47:22,557 INFO L131 PetriNetUnfolder]: For 158/158 co-relation queries the response was YES. [2022-11-25 17:47:22,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3065 conditions, 1279 events. 731/1279 cut-off events. For 158/158 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 6785 event pairs, 597 based on Foata normal form. 1/756 useless extension candidates. Maximal degree in co-relation 2894. Up to 1274 conditions per place. [2022-11-25 17:47:22,567 INFO L137 encePairwiseOnDemand]: 392/395 looper letters, 33 selfloop transitions, 6 changer transitions 0/39 dead transitions. [2022-11-25 17:47:22,567 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 39 transitions, 268 flow [2022-11-25 17:47:22,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:47:22,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:47:22,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 540 transitions. [2022-11-25 17:47:22,570 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45569620253164556 [2022-11-25 17:47:22,570 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 540 transitions. [2022-11-25 17:47:22,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 540 transitions. [2022-11-25 17:47:22,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:22,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 540 transitions. [2022-11-25 17:47:22,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:22,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:22,576 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:22,577 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 200 flow. Second operand 3 states and 540 transitions. [2022-11-25 17:47:22,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 39 transitions, 268 flow [2022-11-25 17:47:22,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 39 transitions, 260 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 17:47:22,583 INFO L231 Difference]: Finished difference. Result has 42 places, 39 transitions, 194 flow [2022-11-25 17:47:22,583 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=42, PETRI_TRANSITIONS=39} [2022-11-25 17:47:22,586 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 6 predicate places. [2022-11-25 17:47:22,586 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 39 transitions, 194 flow [2022-11-25 17:47:22,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2022-11-25 17:47:22,587 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:22,587 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:47:22,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 17:47:22,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:47:22,792 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-25 17:47:22,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:22,793 INFO L85 PathProgramCache]: Analyzing trace with hash 941979825, now seen corresponding path program 1 times [2022-11-25 17:47:22,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:22,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305600771] [2022-11-25 17:47:22,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:22,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:22,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:22,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:47:22,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:22,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305600771] [2022-11-25 17:47:22,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305600771] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:47:22,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832114506] [2022-11-25 17:47:22,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:22,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:47:22,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:47:22,919 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:47:22,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 17:47:23,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:23,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:47:23,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:47:23,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:47:23,024 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:47:23,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832114506] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:23,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:47:23,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2022-11-25 17:47:23,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931329606] [2022-11-25 17:47:23,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:23,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:47:23,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:23,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:47:23,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:47:23,032 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 395 [2022-11-25 17:47:23,033 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 39 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:23,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:23,034 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 395 [2022-11-25 17:47:23,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:23,248 INFO L130 PetriNetUnfolder]: 559/987 cut-off events. [2022-11-25 17:47:23,248 INFO L131 PetriNetUnfolder]: For 155/155 co-relation queries the response was YES. [2022-11-25 17:47:23,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2317 conditions, 987 events. 559/987 cut-off events. For 155/155 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 4880 event pairs, 441 based on Foata normal form. 56/639 useless extension candidates. Maximal degree in co-relation 2254. Up to 987 conditions per place. [2022-11-25 17:47:23,255 INFO L137 encePairwiseOnDemand]: 392/395 looper letters, 36 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2022-11-25 17:47:23,255 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 37 transitions, 260 flow [2022-11-25 17:47:23,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:47:23,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:47:23,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 545 transitions. [2022-11-25 17:47:23,258 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.459915611814346 [2022-11-25 17:47:23,258 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 545 transitions. [2022-11-25 17:47:23,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 545 transitions. [2022-11-25 17:47:23,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:23,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 545 transitions. [2022-11-25 17:47:23,261 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) [2022-11-25 17:47:23,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:23,265 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:23,265 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 194 flow. Second operand 3 states and 545 transitions. [2022-11-25 17:47:23,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 37 transitions, 260 flow [2022-11-25 17:47:23,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 37 transitions, 248 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:47:23,267 INFO L231 Difference]: Finished difference. Result has 40 places, 37 transitions, 176 flow [2022-11-25 17:47:23,268 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=40, PETRI_TRANSITIONS=37} [2022-11-25 17:47:23,269 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 4 predicate places. [2022-11-25 17:47:23,269 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 37 transitions, 176 flow [2022-11-25 17:47:23,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:23,269 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:23,270 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:23,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 17:47:23,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:47:23,477 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-25 17:47:23,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:23,478 INFO L85 PathProgramCache]: Analyzing trace with hash -876932357, now seen corresponding path program 1 times [2022-11-25 17:47:23,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:23,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635058047] [2022-11-25 17:47:23,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:23,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:23,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:23,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:47:23,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:23,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635058047] [2022-11-25 17:47:23,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635058047] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:23,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:23,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:47:23,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571147848] [2022-11-25 17:47:23,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:23,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:47:23,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:23,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:47:23,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:47:23,606 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 395 [2022-11-25 17:47:23,607 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 37 transitions, 176 flow. Second operand has 4 states, 4 states have (on average 166.75) internal successors, (667), 4 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:23,607 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:23,608 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 395 [2022-11-25 17:47:23,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:23,850 INFO L130 PetriNetUnfolder]: 628/1171 cut-off events. [2022-11-25 17:47:23,850 INFO L131 PetriNetUnfolder]: For 125/125 co-relation queries the response was YES. [2022-11-25 17:47:23,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2758 conditions, 1171 events. 628/1171 cut-off events. For 125/125 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 6345 event pairs, 510 based on Foata normal form. 24/791 useless extension candidates. Maximal degree in co-relation 2744. Up to 986 conditions per place. [2022-11-25 17:47:23,857 INFO L137 encePairwiseOnDemand]: 385/395 looper letters, 39 selfloop transitions, 4 changer transitions 19/62 dead transitions. [2022-11-25 17:47:23,857 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 62 transitions, 394 flow [2022-11-25 17:47:23,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:47:23,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:47:23,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 881 transitions. [2022-11-25 17:47:23,861 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4460759493670886 [2022-11-25 17:47:23,861 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 881 transitions. [2022-11-25 17:47:23,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 881 transitions. [2022-11-25 17:47:23,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:23,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 881 transitions. [2022-11-25 17:47:23,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 176.2) internal successors, (881), 5 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:23,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 395.0) internal successors, (2370), 6 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:23,868 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 395.0) internal successors, (2370), 6 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:23,868 INFO L175 Difference]: Start difference. First operand has 40 places, 37 transitions, 176 flow. Second operand 5 states and 881 transitions. [2022-11-25 17:47:23,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 62 transitions, 394 flow [2022-11-25 17:47:23,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 62 transitions, 393 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:47:23,871 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 211 flow [2022-11-25 17:47:23,871 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=175, 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=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=211, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2022-11-25 17:47:23,872 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 9 predicate places. [2022-11-25 17:47:23,872 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 211 flow [2022-11-25 17:47:23,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 166.75) internal successors, (667), 4 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:23,873 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:23,873 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2022-11-25 17:47:23,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 17:47:23,873 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-25 17:47:23,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:23,874 INFO L85 PathProgramCache]: Analyzing trace with hash -862941878, now seen corresponding path program 1 times [2022-11-25 17:47:23,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:23,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202262249] [2022-11-25 17:47:23,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:23,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:23,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:23,999 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:47:24,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:24,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202262249] [2022-11-25 17:47:24,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202262249] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:47:24,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143134793] [2022-11-25 17:47:24,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:24,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:47:24,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:47:24,002 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:47:24,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 17:47:24,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:24,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 17:47:24,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:47:24,121 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:47:24,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:47:24,177 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:47:24,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143134793] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:47:24,178 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:47:24,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-25 17:47:24,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539311672] [2022-11-25 17:47:24,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:47:24,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 17:47:24,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:24,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 17:47:24,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-25 17:47:24,297 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 395 [2022-11-25 17:47:24,300 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 211 flow. Second operand has 13 states, 13 states have (on average 170.15384615384616) internal successors, (2212), 13 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:24,301 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:24,301 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 395 [2022-11-25 17:47:24,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:25,086 INFO L130 PetriNetUnfolder]: 1522/2803 cut-off events. [2022-11-25 17:47:25,086 INFO L131 PetriNetUnfolder]: For 607/607 co-relation queries the response was YES. [2022-11-25 17:47:25,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7726 conditions, 2803 events. 1522/2803 cut-off events. For 607/607 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 16665 event pairs, 1230 based on Foata normal form. 12/1969 useless extension candidates. Maximal degree in co-relation 7709. Up to 853 conditions per place. [2022-11-25 17:47:25,104 INFO L137 encePairwiseOnDemand]: 390/395 looper letters, 203 selfloop transitions, 32 changer transitions 2/237 dead transitions. [2022-11-25 17:47:25,104 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 237 transitions, 1449 flow [2022-11-25 17:47:25,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 17:47:25,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 17:47:25,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2270 transitions. [2022-11-25 17:47:25,111 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47890295358649787 [2022-11-25 17:47:25,112 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2270 transitions. [2022-11-25 17:47:25,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2270 transitions. [2022-11-25 17:47:25,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:25,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2270 transitions. [2022-11-25 17:47:25,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 189.16666666666666) internal successors, (2270), 12 states have internal predecessors, (2270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:25,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 395.0) internal successors, (5135), 13 states have internal predecessors, (5135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:25,130 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 395.0) internal successors, (5135), 13 states have internal predecessors, (5135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:25,130 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 211 flow. Second operand 12 states and 2270 transitions. [2022-11-25 17:47:25,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 237 transitions, 1449 flow [2022-11-25 17:47:25,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 237 transitions, 1429 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-25 17:47:25,140 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 421 flow [2022-11-25 17:47:25,140 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=421, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2022-11-25 17:47:25,142 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 24 predicate places. [2022-11-25 17:47:25,142 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 421 flow [2022-11-25 17:47:25,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 170.15384615384616) internal successors, (2212), 13 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:25,143 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:25,143 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:25,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 17:47:25,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:47:25,349 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-25 17:47:25,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:25,350 INFO L85 PathProgramCache]: Analyzing trace with hash -534938305, now seen corresponding path program 1 times [2022-11-25 17:47:25,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:25,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573490606] [2022-11-25 17:47:25,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:25,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:25,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:25,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:47:25,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:25,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573490606] [2022-11-25 17:47:25,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573490606] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:47:25,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072729071] [2022-11-25 17:47:25,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:25,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:47:25,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:47:25,465 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:47:25,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 17:47:25,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:25,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:47:25,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:47:25,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:47:25,593 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:47:25,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072729071] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:25,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:47:25,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2022-11-25 17:47:25,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139339680] [2022-11-25 17:47:25,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:25,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:47:25,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:25,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:47:25,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:47:25,602 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 395 [2022-11-25 17:47:25,603 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 421 flow. Second operand has 3 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:25,603 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:25,603 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 395 [2022-11-25 17:47:25,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:25,947 INFO L130 PetriNetUnfolder]: 1146/2161 cut-off events. [2022-11-25 17:47:25,948 INFO L131 PetriNetUnfolder]: For 607/607 co-relation queries the response was YES. [2022-11-25 17:47:25,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5882 conditions, 2161 events. 1146/2161 cut-off events. For 607/607 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12436 event pairs, 894 based on Foata normal form. 0/1681 useless extension candidates. Maximal degree in co-relation 5859. Up to 2161 conditions per place. [2022-11-25 17:47:25,963 INFO L137 encePairwiseOnDemand]: 392/395 looper letters, 52 selfloop transitions, 1 changer transitions 1/54 dead transitions. [2022-11-25 17:47:25,964 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 54 transitions, 519 flow [2022-11-25 17:47:25,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:47:25,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:47:25,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 543 transitions. [2022-11-25 17:47:25,966 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4582278481012658 [2022-11-25 17:47:25,966 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 543 transitions. [2022-11-25 17:47:25,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 543 transitions. [2022-11-25 17:47:25,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:25,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 543 transitions. [2022-11-25 17:47:25,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:25,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:25,971 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:25,971 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 421 flow. Second operand 3 states and 543 transitions. [2022-11-25 17:47:25,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 54 transitions, 519 flow [2022-11-25 17:47:25,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 54 transitions, 427 flow, removed 26 selfloop flow, removed 5 redundant places. [2022-11-25 17:47:25,976 INFO L231 Difference]: Finished difference. Result has 55 places, 53 transitions, 315 flow [2022-11-25 17:47:25,977 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=319, 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=315, PETRI_PLACES=55, PETRI_TRANSITIONS=53} [2022-11-25 17:47:25,977 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 19 predicate places. [2022-11-25 17:47:25,978 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 53 transitions, 315 flow [2022-11-25 17:47:25,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:25,978 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:25,978 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:25,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 17:47:26,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:47:26,193 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-25 17:47:26,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:26,193 INFO L85 PathProgramCache]: Analyzing trace with hash -521401574, now seen corresponding path program 1 times [2022-11-25 17:47:26,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:26,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176876907] [2022-11-25 17:47:26,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:26,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:26,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:26,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:47:26,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:26,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176876907] [2022-11-25 17:47:26,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176876907] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:26,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:26,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:47:26,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889231830] [2022-11-25 17:47:26,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:26,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:47:26,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:26,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:47:26,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:47:26,311 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 395 [2022-11-25 17:47:26,312 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 53 transitions, 315 flow. Second operand has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:26,312 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:26,312 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 395 [2022-11-25 17:47:26,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:26,671 INFO L130 PetriNetUnfolder]: 1242/2337 cut-off events. [2022-11-25 17:47:26,671 INFO L131 PetriNetUnfolder]: For 765/765 co-relation queries the response was YES. [2022-11-25 17:47:26,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6247 conditions, 2337 events. 1242/2337 cut-off events. For 765/765 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13954 event pairs, 460 based on Foata normal form. 60/1957 useless extension candidates. Maximal degree in co-relation 6224. Up to 1531 conditions per place. [2022-11-25 17:47:26,694 INFO L137 encePairwiseOnDemand]: 390/395 looper letters, 57 selfloop transitions, 2 changer transitions 1/60 dead transitions. [2022-11-25 17:47:26,694 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 60 transitions, 456 flow [2022-11-25 17:47:26,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:47:26,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:47:26,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 545 transitions. [2022-11-25 17:47:26,696 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.459915611814346 [2022-11-25 17:47:26,696 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 545 transitions. [2022-11-25 17:47:26,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 545 transitions. [2022-11-25 17:47:26,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:26,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 545 transitions. [2022-11-25 17:47:26,698 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) [2022-11-25 17:47:26,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:26,700 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:26,700 INFO L175 Difference]: Start difference. First operand has 55 places, 53 transitions, 315 flow. Second operand 3 states and 545 transitions. [2022-11-25 17:47:26,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 60 transitions, 456 flow [2022-11-25 17:47:26,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 60 transitions, 451 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-25 17:47:26,705 INFO L231 Difference]: Finished difference. Result has 56 places, 54 transitions, 330 flow [2022-11-25 17:47:26,706 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=312, 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=330, PETRI_PLACES=56, PETRI_TRANSITIONS=54} [2022-11-25 17:47:26,706 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 20 predicate places. [2022-11-25 17:47:26,706 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 54 transitions, 330 flow [2022-11-25 17:47:26,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:26,707 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:26,707 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:26,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 17:47:26,707 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-25 17:47:26,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:26,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1446659568, now seen corresponding path program 1 times [2022-11-25 17:47:26,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:26,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271128883] [2022-11-25 17:47:26,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:26,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:26,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:26,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:47:26,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:26,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271128883] [2022-11-25 17:47:26,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271128883] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:26,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:26,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:47:26,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193474661] [2022-11-25 17:47:26,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:26,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:47:26,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:26,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:47:26,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:47:26,801 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 395 [2022-11-25 17:47:26,802 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 54 transitions, 330 flow. Second operand has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:26,802 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:26,802 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 395 [2022-11-25 17:47:26,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:27,209 INFO L130 PetriNetUnfolder]: 1262/2417 cut-off events. [2022-11-25 17:47:27,209 INFO L131 PetriNetUnfolder]: For 955/955 co-relation queries the response was YES. [2022-11-25 17:47:27,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6809 conditions, 2417 events. 1262/2417 cut-off events. For 955/955 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14716 event pairs, 640 based on Foata normal form. 60/2037 useless extension candidates. Maximal degree in co-relation 6784. Up to 1731 conditions per place. [2022-11-25 17:47:27,226 INFO L137 encePairwiseOnDemand]: 390/395 looper letters, 57 selfloop transitions, 2 changer transitions 4/63 dead transitions. [2022-11-25 17:47:27,226 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 63 transitions, 484 flow [2022-11-25 17:47:27,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:47:27,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:47:27,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 547 transitions. [2022-11-25 17:47:27,229 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46160337552742614 [2022-11-25 17:47:27,229 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 547 transitions. [2022-11-25 17:47:27,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 547 transitions. [2022-11-25 17:47:27,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:27,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 547 transitions. [2022-11-25 17:47:27,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:27,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:27,233 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:27,234 INFO L175 Difference]: Start difference. First operand has 56 places, 54 transitions, 330 flow. Second operand 3 states and 547 transitions. [2022-11-25 17:47:27,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 63 transitions, 484 flow [2022-11-25 17:47:27,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 63 transitions, 473 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-11-25 17:47:27,238 INFO L231 Difference]: Finished difference. Result has 58 places, 55 transitions, 338 flow [2022-11-25 17:47:27,239 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=338, PETRI_PLACES=58, PETRI_TRANSITIONS=55} [2022-11-25 17:47:27,239 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 22 predicate places. [2022-11-25 17:47:27,239 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 55 transitions, 338 flow [2022-11-25 17:47:27,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:27,240 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:27,240 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:27,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 17:47:27,240 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-25 17:47:27,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:27,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1896772705, now seen corresponding path program 1 times [2022-11-25 17:47:27,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:27,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375350096] [2022-11-25 17:47:27,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:27,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:27,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:27,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:47:27,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:27,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375350096] [2022-11-25 17:47:27,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375350096] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:47:27,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904833266] [2022-11-25 17:47:27,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:27,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:47:27,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:47:27,879 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:47:27,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 17:47:28,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:28,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-25 17:47:28,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:47:28,116 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 [2022-11-25 17:47:28,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:47:28,241 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 [2022-11-25 17:47:28,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:47:28,351 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 [2022-11-25 17:47:28,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:47:28,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:47:28,723 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:47:28,723 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 [2022-11-25 17:47:28,736 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:47:28,737 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 85 [2022-11-25 17:47:28,743 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 [2022-11-25 17:47:28,751 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 [2022-11-25 17:47:28,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:47:28,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904833266] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:47:28,967 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:47:28,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2022-11-25 17:47:28,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764119986] [2022-11-25 17:47:28,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:47:28,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 17:47:28,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:28,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 17:47:28,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-11-25 17:47:30,831 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 395 [2022-11-25 17:47:30,834 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 55 transitions, 338 flow. Second operand has 19 states, 19 states have (on average 140.6315789473684) internal successors, (2672), 19 states have internal predecessors, (2672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:30,834 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:30,834 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 395 [2022-11-25 17:47:30,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:32,897 INFO L130 PetriNetUnfolder]: 1402/2639 cut-off events. [2022-11-25 17:47:32,897 INFO L131 PetriNetUnfolder]: For 1308/1308 co-relation queries the response was YES. [2022-11-25 17:47:32,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7779 conditions, 2639 events. 1402/2639 cut-off events. For 1308/1308 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 16131 event pairs, 567 based on Foata normal form. 0/2115 useless extension candidates. Maximal degree in co-relation 7752. Up to 1770 conditions per place. [2022-11-25 17:47:32,917 INFO L137 encePairwiseOnDemand]: 385/395 looper letters, 104 selfloop transitions, 34 changer transitions 15/153 dead transitions. [2022-11-25 17:47:32,917 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 153 transitions, 997 flow [2022-11-25 17:47:32,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 17:47:32,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-25 17:47:32,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2212 transitions. [2022-11-25 17:47:32,924 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37333333333333335 [2022-11-25 17:47:32,924 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2212 transitions. [2022-11-25 17:47:32,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2212 transitions. [2022-11-25 17:47:32,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:32,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2212 transitions. [2022-11-25 17:47:32,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 147.46666666666667) internal successors, (2212), 15 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:32,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 395.0) internal successors, (6320), 16 states have internal predecessors, (6320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:32,957 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 395.0) internal successors, (6320), 16 states have internal predecessors, (6320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:32,958 INFO L175 Difference]: Start difference. First operand has 58 places, 55 transitions, 338 flow. Second operand 15 states and 2212 transitions. [2022-11-25 17:47:32,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 153 transitions, 997 flow [2022-11-25 17:47:32,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 153 transitions, 949 flow, removed 22 selfloop flow, removed 2 redundant places. [2022-11-25 17:47:32,968 INFO L231 Difference]: Finished difference. Result has 75 places, 71 transitions, 493 flow [2022-11-25 17:47:32,968 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=493, PETRI_PLACES=75, PETRI_TRANSITIONS=71} [2022-11-25 17:47:32,969 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 39 predicate places. [2022-11-25 17:47:32,969 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 71 transitions, 493 flow [2022-11-25 17:47:32,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 140.6315789473684) internal successors, (2672), 19 states have internal predecessors, (2672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:32,971 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:32,971 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:32,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 17:47:33,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 17:47:33,179 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-25 17:47:33,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:33,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1785011816, now seen corresponding path program 1 times [2022-11-25 17:47:33,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:33,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998782465] [2022-11-25 17:47:33,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:33,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:33,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:34,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:47:34,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:34,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998782465] [2022-11-25 17:47:34,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998782465] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:47:34,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252501566] [2022-11-25 17:47:34,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:34,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:47:34,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:47:34,448 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:47:34,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 17:47:34,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:34,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 17:47:34,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:47:34,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:47:34,755 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 [2022-11-25 17:47:34,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:47:34,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:47:34,821 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_356 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_356) c_~q2~0.base) (+ c_~q2~0.offset (* c_~q2_front~0 4))) 2147483647)) is different from false [2022-11-25 17:47:34,836 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:47:34,837 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 42 treesize of output 38 [2022-11-25 17:47:34,841 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 9 treesize of output 3 [2022-11-25 17:47:34,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 17:47:34,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252501566] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 17:47:34,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:47:34,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 6] total 19 [2022-11-25 17:47:34,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161082777] [2022-11-25 17:47:34,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:34,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:47:34,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:34,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:47:34,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=327, Unknown=1, NotChecked=36, Total=420 [2022-11-25 17:47:35,058 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 395 [2022-11-25 17:47:35,059 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 71 transitions, 493 flow. Second operand has 7 states, 7 states have (on average 142.57142857142858) internal successors, (998), 7 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:35,059 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:35,059 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 395 [2022-11-25 17:47:35,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:35,120 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~q2~0.offset (* c_~q2_front~0 4)))) (and (< (select (select |c_#memory_int| c_~q2~0.base) .cse0) 2147483647) (forall ((v_ArrVal_356 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_356) c_~q2~0.base) .cse0) 2147483647)))) is different from false [2022-11-25 17:47:35,720 INFO L130 PetriNetUnfolder]: 1740/3275 cut-off events. [2022-11-25 17:47:35,720 INFO L131 PetriNetUnfolder]: For 5494/5494 co-relation queries the response was YES. [2022-11-25 17:47:35,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10669 conditions, 3275 events. 1740/3275 cut-off events. For 5494/5494 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 20603 event pairs, 463 based on Foata normal form. 0/2827 useless extension candidates. Maximal degree in co-relation 10637. Up to 2055 conditions per place. [2022-11-25 17:47:35,750 INFO L137 encePairwiseOnDemand]: 382/395 looper letters, 73 selfloop transitions, 23 changer transitions 6/102 dead transitions. [2022-11-25 17:47:35,751 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 102 transitions, 835 flow [2022-11-25 17:47:35,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:47:35,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:47:35,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 759 transitions. [2022-11-25 17:47:35,754 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3843037974683544 [2022-11-25 17:47:35,754 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 759 transitions. [2022-11-25 17:47:35,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 759 transitions. [2022-11-25 17:47:35,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:35,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 759 transitions. [2022-11-25 17:47:35,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 151.8) internal successors, (759), 5 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:35,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 395.0) internal successors, (2370), 6 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:35,760 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 395.0) internal successors, (2370), 6 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:35,760 INFO L175 Difference]: Start difference. First operand has 75 places, 71 transitions, 493 flow. Second operand 5 states and 759 transitions. [2022-11-25 17:47:35,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 102 transitions, 835 flow [2022-11-25 17:47:35,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 102 transitions, 788 flow, removed 8 selfloop flow, removed 4 redundant places. [2022-11-25 17:47:35,787 INFO L231 Difference]: Finished difference. Result has 77 places, 84 transitions, 632 flow [2022-11-25 17:47:35,787 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=632, PETRI_PLACES=77, PETRI_TRANSITIONS=84} [2022-11-25 17:47:35,788 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 41 predicate places. [2022-11-25 17:47:35,788 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 84 transitions, 632 flow [2022-11-25 17:47:35,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 142.57142857142858) internal successors, (998), 7 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:35,789 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:35,789 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:35,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 17:47:35,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 17:47:35,994 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-25 17:47:35,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:35,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1329588224, now seen corresponding path program 1 times [2022-11-25 17:47:35,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:35,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540729254] [2022-11-25 17:47:35,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:35,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:36,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:36,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:47:36,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:36,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540729254] [2022-11-25 17:47:36,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540729254] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:47:36,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331156795] [2022-11-25 17:47:36,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:36,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:47:36,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:47:36,518 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:47:36,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 17:47:36,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:36,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 17:47:36,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:47:36,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:47:36,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:47:36,852 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:47:36,853 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 20 [2022-11-25 17:47:37,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:47:37,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331156795] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:47:37,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:47:37,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2022-11-25 17:47:37,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575951801] [2022-11-25 17:47:37,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:47:37,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 17:47:37,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:37,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 17:47:37,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-11-25 17:47:37,716 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 395 [2022-11-25 17:47:37,718 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 84 transitions, 632 flow. Second operand has 14 states, 14 states have (on average 149.57142857142858) internal successors, (2094), 14 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:37,718 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:37,718 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 395 [2022-11-25 17:47:37,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:39,045 INFO L130 PetriNetUnfolder]: 3262/5813 cut-off events. [2022-11-25 17:47:39,046 INFO L131 PetriNetUnfolder]: For 17643/17643 co-relation queries the response was YES. [2022-11-25 17:47:39,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25430 conditions, 5813 events. 3262/5813 cut-off events. For 17643/17643 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 38598 event pairs, 333 based on Foata normal form. 0/5291 useless extension candidates. Maximal degree in co-relation 25397. Up to 3203 conditions per place. [2022-11-25 17:47:39,104 INFO L137 encePairwiseOnDemand]: 384/395 looper letters, 149 selfloop transitions, 50 changer transitions 24/223 dead transitions. [2022-11-25 17:47:39,105 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 223 transitions, 2070 flow [2022-11-25 17:47:39,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 17:47:39,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 17:47:39,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2020 transitions. [2022-11-25 17:47:39,110 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3933787731256086 [2022-11-25 17:47:39,110 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2020 transitions. [2022-11-25 17:47:39,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2020 transitions. [2022-11-25 17:47:39,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:39,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2020 transitions. [2022-11-25 17:47:39,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 155.3846153846154) internal successors, (2020), 13 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:39,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 395.0) internal successors, (5530), 14 states have internal predecessors, (5530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:39,125 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 395.0) internal successors, (5530), 14 states have internal predecessors, (5530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:39,125 INFO L175 Difference]: Start difference. First operand has 77 places, 84 transitions, 632 flow. Second operand 13 states and 2020 transitions. [2022-11-25 17:47:39,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 223 transitions, 2070 flow [2022-11-25 17:47:39,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 223 transitions, 2022 flow, removed 17 selfloop flow, removed 1 redundant places. [2022-11-25 17:47:39,270 INFO L231 Difference]: Finished difference. Result has 94 places, 125 transitions, 1234 flow [2022-11-25 17:47:39,270 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=607, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1234, PETRI_PLACES=94, PETRI_TRANSITIONS=125} [2022-11-25 17:47:39,271 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 58 predicate places. [2022-11-25 17:47:39,271 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 125 transitions, 1234 flow [2022-11-25 17:47:39,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 149.57142857142858) internal successors, (2094), 14 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:39,272 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:39,272 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:39,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 17:47:39,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 17:47:39,473 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-25 17:47:39,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:39,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1330749840, now seen corresponding path program 1 times [2022-11-25 17:47:39,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:39,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157740715] [2022-11-25 17:47:39,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:39,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:39,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:40,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:47:40,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:40,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157740715] [2022-11-25 17:47:40,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157740715] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:47:40,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559746407] [2022-11-25 17:47:40,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:40,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:47:40,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:47:40,020 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:47:40,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 17:47:40,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:40,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 17:47:40,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:47:40,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:47:40,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:47:40,386 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:47:40,387 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 20 [2022-11-25 17:47:40,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:47:40,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559746407] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:47:40,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:47:40,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2022-11-25 17:47:40,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908267707] [2022-11-25 17:47:40,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:47:40,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 17:47:40,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:40,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 17:47:40,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-11-25 17:47:41,274 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 395 [2022-11-25 17:47:41,276 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 125 transitions, 1234 flow. Second operand has 17 states, 17 states have (on average 149.11764705882354) internal successors, (2535), 17 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:41,277 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:41,277 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 395 [2022-11-25 17:47:41,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:42,957 INFO L130 PetriNetUnfolder]: 4470/7977 cut-off events. [2022-11-25 17:47:42,957 INFO L131 PetriNetUnfolder]: For 51588/51588 co-relation queries the response was YES. [2022-11-25 17:47:43,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42884 conditions, 7977 events. 4470/7977 cut-off events. For 51588/51588 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 56147 event pairs, 660 based on Foata normal form. 262/7827 useless extension candidates. Maximal degree in co-relation 42844. Up to 4040 conditions per place. [2022-11-25 17:47:43,046 INFO L137 encePairwiseOnDemand]: 383/395 looper letters, 117 selfloop transitions, 123 changer transitions 10/250 dead transitions. [2022-11-25 17:47:43,046 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 250 transitions, 2893 flow [2022-11-25 17:47:43,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 17:47:43,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-25 17:47:43,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2317 transitions. [2022-11-25 17:47:43,052 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3910548523206751 [2022-11-25 17:47:43,052 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2317 transitions. [2022-11-25 17:47:43,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2317 transitions. [2022-11-25 17:47:43,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:43,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2317 transitions. [2022-11-25 17:47:43,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 154.46666666666667) internal successors, (2317), 15 states have internal predecessors, (2317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:43,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 395.0) internal successors, (6320), 16 states have internal predecessors, (6320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:43,068 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 395.0) internal successors, (6320), 16 states have internal predecessors, (6320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:43,069 INFO L175 Difference]: Start difference. First operand has 94 places, 125 transitions, 1234 flow. Second operand 15 states and 2317 transitions. [2022-11-25 17:47:43,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 250 transitions, 2893 flow [2022-11-25 17:47:43,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 250 transitions, 2845 flow, removed 18 selfloop flow, removed 3 redundant places. [2022-11-25 17:47:43,357 INFO L231 Difference]: Finished difference. Result has 110 places, 186 transitions, 2356 flow [2022-11-25 17:47:43,357 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=1093, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2356, PETRI_PLACES=110, PETRI_TRANSITIONS=186} [2022-11-25 17:47:43,357 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 74 predicate places. [2022-11-25 17:47:43,358 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 186 transitions, 2356 flow [2022-11-25 17:47:43,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 149.11764705882354) internal successors, (2535), 17 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:43,359 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:43,359 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:43,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 17:47:43,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 17:47:43,564 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-25 17:47:43,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:43,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1785011817, now seen corresponding path program 2 times [2022-11-25 17:47:43,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:43,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454021142] [2022-11-25 17:47:43,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:43,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:43,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:44,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:47:44,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:44,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454021142] [2022-11-25 17:47:44,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454021142] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:47:44,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767110353] [2022-11-25 17:47:44,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:47:44,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:47:44,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:47:44,963 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:47:44,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 17:47:45,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 17:47:45,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:47:45,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 17:47:45,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:47:45,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:47:45,256 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 [2022-11-25 17:47:45,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 17:47:45,285 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:47:45,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767110353] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:45,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:47:45,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2022-11-25 17:47:45,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437438731] [2022-11-25 17:47:45,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:45,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:47:45,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:45,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:47:45,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-11-25 17:47:45,462 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 395 [2022-11-25 17:47:45,463 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 186 transitions, 2356 flow. Second operand has 7 states, 7 states have (on average 159.57142857142858) internal successors, (1117), 7 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:45,464 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:45,464 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 395 [2022-11-25 17:47:45,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:46,821 INFO L130 PetriNetUnfolder]: 3687/6964 cut-off events. [2022-11-25 17:47:46,821 INFO L131 PetriNetUnfolder]: For 71074/71074 co-relation queries the response was YES. [2022-11-25 17:47:46,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40011 conditions, 6964 events. 3687/6964 cut-off events. For 71074/71074 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 50997 event pairs, 840 based on Foata normal form. 706/7665 useless extension candidates. Maximal degree in co-relation 39965. Up to 3796 conditions per place. [2022-11-25 17:47:46,877 INFO L137 encePairwiseOnDemand]: 391/395 looper letters, 113 selfloop transitions, 64 changer transitions 5/182 dead transitions. [2022-11-25 17:47:46,877 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 182 transitions, 2452 flow [2022-11-25 17:47:46,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:47:46,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:47:46,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 675 transitions. [2022-11-25 17:47:46,880 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4272151898734177 [2022-11-25 17:47:46,880 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 675 transitions. [2022-11-25 17:47:46,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 675 transitions. [2022-11-25 17:47:46,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:46,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 675 transitions. [2022-11-25 17:47:46,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 168.75) internal successors, (675), 4 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:46,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 395.0) internal successors, (1975), 5 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:46,885 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 395.0) internal successors, (1975), 5 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:46,886 INFO L175 Difference]: Start difference. First operand has 110 places, 186 transitions, 2356 flow. Second operand 4 states and 675 transitions. [2022-11-25 17:47:46,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 182 transitions, 2452 flow [2022-11-25 17:47:47,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 182 transitions, 2244 flow, removed 80 selfloop flow, removed 8 redundant places. [2022-11-25 17:47:47,314 INFO L231 Difference]: Finished difference. Result has 102 places, 161 transitions, 1859 flow [2022-11-25 17:47:47,314 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=1731, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1859, PETRI_PLACES=102, PETRI_TRANSITIONS=161} [2022-11-25 17:47:47,315 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 66 predicate places. [2022-11-25 17:47:47,315 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 161 transitions, 1859 flow [2022-11-25 17:47:47,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 159.57142857142858) internal successors, (1117), 7 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:47,316 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:47,316 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:47,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 17:47:47,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:47:47,522 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-25 17:47:47,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:47,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1599698943, now seen corresponding path program 1 times [2022-11-25 17:47:47,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:47,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852183368] [2022-11-25 17:47:47,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:47,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:47,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:48,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:47:48,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:48,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852183368] [2022-11-25 17:47:48,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852183368] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:47:48,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632455098] [2022-11-25 17:47:48,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:48,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:47:48,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:47:48,815 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:47:48,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 17:47:48,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:48,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 17:47:48,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:47:49,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 17:47:49,024 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:47:49,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632455098] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:49,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:47:49,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 10 [2022-11-25 17:47:49,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567736397] [2022-11-25 17:47:49,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:49,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:47:49,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:49,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:47:49,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:47:49,065 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 395 [2022-11-25 17:47:49,066 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 161 transitions, 1859 flow. Second operand has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:49,066 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:49,066 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 395 [2022-11-25 17:47:49,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:50,114 INFO L130 PetriNetUnfolder]: 3508/6767 cut-off events. [2022-11-25 17:47:50,114 INFO L131 PetriNetUnfolder]: For 43749/43749 co-relation queries the response was YES. [2022-11-25 17:47:50,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36949 conditions, 6767 events. 3508/6767 cut-off events. For 43749/43749 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 50340 event pairs, 560 based on Foata normal form. 165/6932 useless extension candidates. Maximal degree in co-relation 36906. Up to 4409 conditions per place. [2022-11-25 17:47:50,173 INFO L137 encePairwiseOnDemand]: 391/395 looper letters, 150 selfloop transitions, 19 changer transitions 7/176 dead transitions. [2022-11-25 17:47:50,173 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 176 transitions, 2323 flow [2022-11-25 17:47:50,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:47:50,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:47:50,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 701 transitions. [2022-11-25 17:47:50,175 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44367088607594934 [2022-11-25 17:47:50,176 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 701 transitions. [2022-11-25 17:47:50,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 701 transitions. [2022-11-25 17:47:50,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:50,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 701 transitions. [2022-11-25 17:47:50,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 175.25) internal successors, (701), 4 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:50,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 395.0) internal successors, (1975), 5 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:50,181 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 395.0) internal successors, (1975), 5 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:50,181 INFO L175 Difference]: Start difference. First operand has 102 places, 161 transitions, 1859 flow. Second operand 4 states and 701 transitions. [2022-11-25 17:47:50,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 176 transitions, 2323 flow [2022-11-25 17:47:50,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 176 transitions, 2155 flow, removed 10 selfloop flow, removed 4 redundant places. [2022-11-25 17:47:50,362 INFO L231 Difference]: Finished difference. Result has 99 places, 153 transitions, 1644 flow [2022-11-25 17:47:50,363 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=1606, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1644, PETRI_PLACES=99, PETRI_TRANSITIONS=153} [2022-11-25 17:47:50,363 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 63 predicate places. [2022-11-25 17:47:50,363 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 153 transitions, 1644 flow [2022-11-25 17:47:50,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:50,364 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:50,364 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:50,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 17:47:50,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 17:47:50,570 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-25 17:47:50,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:50,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1696759731, now seen corresponding path program 1 times [2022-11-25 17:47:50,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:50,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242681789] [2022-11-25 17:47:50,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:50,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:50,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:50,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:47:50,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:50,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242681789] [2022-11-25 17:47:50,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242681789] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:47:50,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204082788] [2022-11-25 17:47:50,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:50,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:47:50,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:47:50,711 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:47:50,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 17:47:50,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:50,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 17:47:50,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:47:50,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:47:50,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:47:50,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:47:50,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204082788] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:47:50,999 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:47:50,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-25 17:47:50,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303262109] [2022-11-25 17:47:50,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:47:51,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:47:51,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:51,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:47:51,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:47:51,200 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 395 [2022-11-25 17:47:51,203 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 153 transitions, 1644 flow. Second operand has 12 states, 12 states have (on average 161.08333333333334) internal successors, (1933), 12 states have internal predecessors, (1933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:51,203 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:51,203 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 395 [2022-11-25 17:47:51,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:52,726 INFO L130 PetriNetUnfolder]: 3718/7317 cut-off events. [2022-11-25 17:47:52,726 INFO L131 PetriNetUnfolder]: For 37405/37405 co-relation queries the response was YES. [2022-11-25 17:47:52,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37666 conditions, 7317 events. 3718/7317 cut-off events. For 37405/37405 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 56152 event pairs, 1772 based on Foata normal form. 220/7537 useless extension candidates. Maximal degree in co-relation 37624. Up to 4305 conditions per place. [2022-11-25 17:47:52,777 INFO L137 encePairwiseOnDemand]: 389/395 looper letters, 196 selfloop transitions, 10 changer transitions 36/242 dead transitions. [2022-11-25 17:47:52,777 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 242 transitions, 2727 flow [2022-11-25 17:47:52,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 17:47:52,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 17:47:52,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1664 transitions. [2022-11-25 17:47:52,782 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4212658227848101 [2022-11-25 17:47:52,782 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1664 transitions. [2022-11-25 17:47:52,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1664 transitions. [2022-11-25 17:47:52,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:52,783 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1664 transitions. [2022-11-25 17:47:52,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 166.4) internal successors, (1664), 10 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:52,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 395.0) internal successors, (4345), 11 states have internal predecessors, (4345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:52,792 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 395.0) internal successors, (4345), 11 states have internal predecessors, (4345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:52,792 INFO L175 Difference]: Start difference. First operand has 99 places, 153 transitions, 1644 flow. Second operand 10 states and 1664 transitions. [2022-11-25 17:47:52,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 242 transitions, 2727 flow [2022-11-25 17:47:52,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 242 transitions, 2685 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-25 17:47:52,958 INFO L231 Difference]: Finished difference. Result has 107 places, 154 transitions, 1655 flow [2022-11-25 17:47:52,958 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=1602, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1655, PETRI_PLACES=107, PETRI_TRANSITIONS=154} [2022-11-25 17:47:52,959 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 71 predicate places. [2022-11-25 17:47:52,959 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 154 transitions, 1655 flow [2022-11-25 17:47:52,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 161.08333333333334) internal successors, (1933), 12 states have internal predecessors, (1933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:52,960 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:52,960 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:52,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 17:47:53,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 17:47:53,165 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-25 17:47:53,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:53,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1696754694, now seen corresponding path program 1 times [2022-11-25 17:47:53,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:53,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030632721] [2022-11-25 17:47:53,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:53,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:53,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:53,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:47:53,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:53,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030632721] [2022-11-25 17:47:53,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030632721] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:47:53,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745790898] [2022-11-25 17:47:53,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:53,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:47:53,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:47:53,299 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:47:53,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 17:47:53,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:53,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 17:47:53,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:47:53,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:47:53,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:47:53,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:47:53,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745790898] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:47:53,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:47:53,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-25 17:47:53,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724077865] [2022-11-25 17:47:53,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:47:53,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:47:53,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:53,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:47:53,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:47:53,794 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 395 [2022-11-25 17:47:53,796 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 154 transitions, 1655 flow. Second operand has 12 states, 12 states have (on average 161.25) internal successors, (1935), 12 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:53,796 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:53,796 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 395 [2022-11-25 17:47:53,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:54,966 INFO L130 PetriNetUnfolder]: 3562/7069 cut-off events. [2022-11-25 17:47:54,966 INFO L131 PetriNetUnfolder]: For 36963/36963 co-relation queries the response was YES. [2022-11-25 17:47:54,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35946 conditions, 7069 events. 3562/7069 cut-off events. For 36963/36963 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 54337 event pairs, 2018 based on Foata normal form. 40/7109 useless extension candidates. Maximal degree in co-relation 35902. Up to 6578 conditions per place. [2022-11-25 17:47:55,012 INFO L137 encePairwiseOnDemand]: 390/395 looper letters, 135 selfloop transitions, 19 changer transitions 19/173 dead transitions. [2022-11-25 17:47:55,012 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 173 transitions, 2118 flow [2022-11-25 17:47:55,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:47:55,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 17:47:55,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1161 transitions. [2022-11-25 17:47:55,014 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4198915009041591 [2022-11-25 17:47:55,015 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1161 transitions. [2022-11-25 17:47:55,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1161 transitions. [2022-11-25 17:47:55,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:55,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1161 transitions. [2022-11-25 17:47:55,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 165.85714285714286) internal successors, (1161), 7 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:55,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 395.0) internal successors, (3160), 8 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:55,021 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 395.0) internal successors, (3160), 8 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:55,022 INFO L175 Difference]: Start difference. First operand has 107 places, 154 transitions, 1655 flow. Second operand 7 states and 1161 transitions. [2022-11-25 17:47:55,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 173 transitions, 2118 flow [2022-11-25 17:47:55,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 173 transitions, 2090 flow, removed 5 selfloop flow, removed 6 redundant places. [2022-11-25 17:47:55,159 INFO L231 Difference]: Finished difference. Result has 107 places, 133 transitions, 1421 flow [2022-11-25 17:47:55,159 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=1519, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1421, PETRI_PLACES=107, PETRI_TRANSITIONS=133} [2022-11-25 17:47:55,159 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 71 predicate places. [2022-11-25 17:47:55,159 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 133 transitions, 1421 flow [2022-11-25 17:47:55,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 161.25) internal successors, (1935), 12 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:55,160 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:55,160 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2022-11-25 17:47:55,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-25 17:47:55,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:47:55,361 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-25 17:47:55,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:55,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1531104202, now seen corresponding path program 2 times [2022-11-25 17:47:55,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:55,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581469223] [2022-11-25 17:47:55,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:55,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:55,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:55,556 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:47:55,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:55,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581469223] [2022-11-25 17:47:55,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581469223] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:47:55,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668680723] [2022-11-25 17:47:55,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:47:55,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:47:55,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:47:55,558 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:47:55,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 17:47:55,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 17:47:55,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:47:55,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 17:47:55,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:47:55,718 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 17:47:55,718 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:47:55,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668680723] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:55,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:47:55,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [12] total 14 [2022-11-25 17:47:55,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428947819] [2022-11-25 17:47:55,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:55,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:47:55,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:55,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:47:55,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:47:55,761 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 395 [2022-11-25 17:47:55,762 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 133 transitions, 1421 flow. Second operand has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:55,762 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:55,762 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 395 [2022-11-25 17:47:55,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:56,864 INFO L130 PetriNetUnfolder]: 3514/6972 cut-off events. [2022-11-25 17:47:56,864 INFO L131 PetriNetUnfolder]: For 36641/36641 co-relation queries the response was YES. [2022-11-25 17:47:56,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35650 conditions, 6972 events. 3514/6972 cut-off events. For 36641/36641 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 53629 event pairs, 2038 based on Foata normal form. 3/6975 useless extension candidates. Maximal degree in co-relation 35606. Up to 6972 conditions per place. [2022-11-25 17:47:56,915 INFO L137 encePairwiseOnDemand]: 393/395 looper letters, 127 selfloop transitions, 1 changer transitions 3/131 dead transitions. [2022-11-25 17:47:56,915 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 131 transitions, 1626 flow [2022-11-25 17:47:56,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:47:56,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:47:56,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 529 transitions. [2022-11-25 17:47:56,916 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44641350210970465 [2022-11-25 17:47:56,916 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 529 transitions. [2022-11-25 17:47:56,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 529 transitions. [2022-11-25 17:47:56,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:56,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 529 transitions. [2022-11-25 17:47:56,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 176.33333333333334) internal successors, (529), 3 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:56,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:56,918 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:56,918 INFO L175 Difference]: Start difference. First operand has 107 places, 133 transitions, 1421 flow. Second operand 3 states and 529 transitions. [2022-11-25 17:47:56,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 131 transitions, 1626 flow [2022-11-25 17:47:57,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 131 transitions, 1506 flow, removed 7 selfloop flow, removed 17 redundant places. [2022-11-25 17:47:57,060 INFO L231 Difference]: Finished difference. Result has 89 places, 128 transitions, 1225 flow [2022-11-25 17:47:57,060 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=1244, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1225, PETRI_PLACES=89, PETRI_TRANSITIONS=128} [2022-11-25 17:47:57,061 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 53 predicate places. [2022-11-25 17:47:57,061 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 128 transitions, 1225 flow [2022-11-25 17:47:57,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:57,061 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:57,061 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:57,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-25 17:47:57,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:47:57,262 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-25 17:47:57,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:57,262 INFO L85 PathProgramCache]: Analyzing trace with hash 898521314, now seen corresponding path program 2 times [2022-11-25 17:47:57,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:57,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697439525] [2022-11-25 17:47:57,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:57,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:57,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:57,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 17:47:57,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:57,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697439525] [2022-11-25 17:47:57,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697439525] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:57,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:57,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:47:57,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802225326] [2022-11-25 17:47:57,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:57,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:47:57,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:57,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:47:57,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:47:57,382 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 395 [2022-11-25 17:47:57,383 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 128 transitions, 1225 flow. Second operand has 4 states, 4 states have (on average 174.25) internal successors, (697), 4 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:57,383 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:57,383 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 395 [2022-11-25 17:47:57,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:47:58,924 INFO L130 PetriNetUnfolder]: 4634/8945 cut-off events. [2022-11-25 17:47:58,924 INFO L131 PetriNetUnfolder]: For 61647/61647 co-relation queries the response was YES. [2022-11-25 17:47:58,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45592 conditions, 8945 events. 4634/8945 cut-off events. For 61647/61647 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 69325 event pairs, 1515 based on Foata normal form. 702/9647 useless extension candidates. Maximal degree in co-relation 45560. Up to 4333 conditions per place. [2022-11-25 17:47:58,994 INFO L137 encePairwiseOnDemand]: 390/395 looper letters, 123 selfloop transitions, 14 changer transitions 27/164 dead transitions. [2022-11-25 17:47:58,995 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 164 transitions, 1917 flow [2022-11-25 17:47:58,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:47:58,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:47:58,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 731 transitions. [2022-11-25 17:47:58,997 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4626582278481013 [2022-11-25 17:47:58,998 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 731 transitions. [2022-11-25 17:47:58,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 731 transitions. [2022-11-25 17:47:58,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:47:58,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 731 transitions. [2022-11-25 17:47:59,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 182.75) internal successors, (731), 4 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:59,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 395.0) internal successors, (1975), 5 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:59,003 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 395.0) internal successors, (1975), 5 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:59,003 INFO L175 Difference]: Start difference. First operand has 89 places, 128 transitions, 1225 flow. Second operand 4 states and 731 transitions. [2022-11-25 17:47:59,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 164 transitions, 1917 flow [2022-11-25 17:47:59,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 164 transitions, 1908 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-11-25 17:47:59,200 INFO L231 Difference]: Finished difference. Result has 87 places, 102 transitions, 948 flow [2022-11-25 17:47:59,201 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=1140, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=948, PETRI_PLACES=87, PETRI_TRANSITIONS=102} [2022-11-25 17:47:59,201 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 51 predicate places. [2022-11-25 17:47:59,201 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 102 transitions, 948 flow [2022-11-25 17:47:59,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 174.25) internal successors, (697), 4 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:59,202 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:47:59,202 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:59,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-25 17:47:59,202 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-25 17:47:59,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:59,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1393516079, now seen corresponding path program 1 times [2022-11-25 17:47:59,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:59,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748858909] [2022-11-25 17:47:59,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:59,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:59,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:59,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:47:59,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:59,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748858909] [2022-11-25 17:47:59,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748858909] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:47:59,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149498961] [2022-11-25 17:47:59,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:59,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:47:59,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:47:59,472 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:47:59,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 17:47:59,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:59,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 17:47:59,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:47:59,672 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 17:47:59,672 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:47:59,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149498961] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:59,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:47:59,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2022-11-25 17:47:59,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351955359] [2022-11-25 17:47:59,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:59,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:47:59,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:59,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:47:59,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-25 17:47:59,681 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 395 [2022-11-25 17:47:59,683 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 102 transitions, 948 flow. Second operand has 4 states, 4 states have (on average 174.5) internal successors, (698), 4 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:59,683 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:59,683 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 395 [2022-11-25 17:47:59,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:48:01,227 INFO L130 PetriNetUnfolder]: 5919/11589 cut-off events. [2022-11-25 17:48:01,227 INFO L131 PetriNetUnfolder]: For 120000/120000 co-relation queries the response was YES. [2022-11-25 17:48:01,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62223 conditions, 11589 events. 5919/11589 cut-off events. For 120000/120000 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 96335 event pairs, 2197 based on Foata normal form. 1140/12729 useless extension candidates. Maximal degree in co-relation 62190. Up to 5724 conditions per place. [2022-11-25 17:48:01,315 INFO L137 encePairwiseOnDemand]: 390/395 looper letters, 104 selfloop transitions, 28 changer transitions 15/147 dead transitions. [2022-11-25 17:48:01,315 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 147 transitions, 1761 flow [2022-11-25 17:48:01,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:48:01,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:48:01,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 733 transitions. [2022-11-25 17:48:01,317 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46392405063291137 [2022-11-25 17:48:01,318 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 733 transitions. [2022-11-25 17:48:01,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 733 transitions. [2022-11-25 17:48:01,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:48:01,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 733 transitions. [2022-11-25 17:48:01,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 183.25) internal successors, (733), 4 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:48:01,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 395.0) internal successors, (1975), 5 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:48:01,321 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 395.0) internal successors, (1975), 5 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:48:01,321 INFO L175 Difference]: Start difference. First operand has 87 places, 102 transitions, 948 flow. Second operand 4 states and 733 transitions. [2022-11-25 17:48:01,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 147 transitions, 1761 flow [2022-11-25 17:48:01,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 147 transitions, 1589 flow, removed 86 selfloop flow, removed 3 redundant places. [2022-11-25 17:48:01,775 INFO L231 Difference]: Finished difference. Result has 84 places, 102 transitions, 1013 flow [2022-11-25 17:48:01,775 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=852, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1013, PETRI_PLACES=84, PETRI_TRANSITIONS=102} [2022-11-25 17:48:01,776 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 48 predicate places. [2022-11-25 17:48:01,776 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 102 transitions, 1013 flow [2022-11-25 17:48:01,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 174.5) internal successors, (698), 4 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:48:01,777 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:48:01,777 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:48:01,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-11-25 17:48:01,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-25 17:48:01,982 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-25 17:48:01,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:48:01,983 INFO L85 PathProgramCache]: Analyzing trace with hash 299724817, now seen corresponding path program 1 times [2022-11-25 17:48:01,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:48:01,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925561338] [2022-11-25 17:48:01,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:48:01,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:48:02,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:48:02,638 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:48:02,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:48:02,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925561338] [2022-11-25 17:48:02,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925561338] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:48:02,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520711576] [2022-11-25 17:48:02,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:48:02,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:48:02,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:48:02,643 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:48:02,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-25 17:48:02,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:48:02,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-25 17:48:02,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:48:02,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:48:02,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:48:02,859 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 17:48:02,859 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 [2022-11-25 17:48:02,918 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 16 treesize of output 12 [2022-11-25 17:48:02,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 29 [2022-11-25 17:48:03,111 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 17:48:03,112 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 [2022-11-25 17:48:03,180 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 21 treesize of output 23 [2022-11-25 17:48:03,263 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 21 treesize of output 23 [2022-11-25 17:48:03,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:48:03,343 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 21 treesize of output 23 [2022-11-25 17:48:03,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:48:03,435 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 21 treesize of output 23 [2022-11-25 17:48:03,922 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:48:03,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:48:15,049 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:48:15,050 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 125 treesize of output 90 [2022-11-25 17:48:15,225 INFO L321 Elim1Store]: treesize reduction 4, result has 96.2 percent of original size [2022-11-25 17:48:15,226 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 61121 treesize of output 56825 [2022-11-25 17:48:15,590 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:48:15,592 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 56720 treesize of output 50054 [2022-11-25 17:48:15,851 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:48:15,852 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 50008 treesize of output 46698 [2022-11-25 17:48:16,066 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:48:16,067 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 46652 treesize of output 33274 [2022-11-25 17:49:24,339 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 1 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:49:24,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520711576] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:49:24,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:49:24,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 35 [2022-11-25 17:49:24,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503374893] [2022-11-25 17:49:24,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:49:24,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-25 17:49:24,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:49:24,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-25 17:49:24,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1175, Unknown=13, NotChecked=0, Total=1332 [2022-11-25 17:49:26,719 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 395 [2022-11-25 17:49:26,721 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 102 transitions, 1013 flow. Second operand has 37 states, 37 states have (on average 110.35135135135135) internal successors, (4083), 37 states have internal predecessors, (4083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:49:26,721 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:49:26,722 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 395 [2022-11-25 17:49:26,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:49:33,108 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] [2022-11-25 17:49:38,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:49:40,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:49:42,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:49:51,683 WARN L233 SmtUtils]: Spent 5.46s on a formula simplification. DAG size of input: 192 DAG size of output: 152 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:49:55,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:49:56,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:50:01,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:50:03,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:50:11,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:50:13,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:50:15,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:50:17,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:50:19,519 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:50:26,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:50:28,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:50:31,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-25 17:50:34,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:50:36,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:50:38,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:50:40,753 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:50:42,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:51:04,340 WARN L233 SmtUtils]: Spent 16.55s on a formula simplification. DAG size of input: 198 DAG size of output: 169 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:51:07,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:51:09,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:51:42,283 WARN L233 SmtUtils]: Spent 30.92s on a formula simplification. DAG size of input: 208 DAG size of output: 172 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:51:57,526 WARN L233 SmtUtils]: Spent 6.08s on a formula simplification. DAG size of input: 175 DAG size of output: 172 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:52:00,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:52:02,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:52:04,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:52:10,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:52:32,038 WARN L233 SmtUtils]: Spent 18.87s on a formula simplification. DAG size of input: 190 DAG size of output: 164 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:52:40,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:52:42,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:52:44,667 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:52:47,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:52:49,074 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:52:51,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:52:53,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:52:59,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:53:01,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:53:10,923 WARN L233 SmtUtils]: Spent 8.29s on a formula simplification. DAG size of input: 184 DAG size of output: 165 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:53:13,429 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:53:15,433 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] [2022-11-25 17:53:17,107 INFO L130 PetriNetUnfolder]: 9044/17221 cut-off events. [2022-11-25 17:53:17,107 INFO L131 PetriNetUnfolder]: For 159971/159971 co-relation queries the response was YES. [2022-11-25 17:53:17,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96397 conditions, 17221 events. 9044/17221 cut-off events. For 159971/159971 co-relation queries the response was YES. Maximal size of possible extension queue 867. Compared 149550 event pairs, 1994 based on Foata normal form. 690/17911 useless extension candidates. Maximal degree in co-relation 96363. Up to 12309 conditions per place. [2022-11-25 17:53:17,245 INFO L137 encePairwiseOnDemand]: 380/395 looper letters, 266 selfloop transitions, 218 changer transitions 87/571 dead transitions. [2022-11-25 17:53:17,245 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 571 transitions, 6135 flow [2022-11-25 17:53:17,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-11-25 17:53:17,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2022-11-25 17:53:17,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 9711 transitions. [2022-11-25 17:53:17,452 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2892330603127327 [2022-11-25 17:53:17,453 INFO L72 ComplementDD]: Start complementDD. Operand 85 states and 9711 transitions. [2022-11-25 17:53:17,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 85 states and 9711 transitions. [2022-11-25 17:53:17,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:53:17,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 85 states and 9711 transitions. [2022-11-25 17:53:17,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 86 states, 85 states have (on average 114.24705882352941) internal successors, (9711), 85 states have internal predecessors, (9711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:17,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 86 states, 86 states have (on average 395.0) internal successors, (33970), 86 states have internal predecessors, (33970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:17,510 INFO L81 ComplementDD]: Finished complementDD. Result has 86 states, 86 states have (on average 395.0) internal successors, (33970), 86 states have internal predecessors, (33970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:17,510 INFO L175 Difference]: Start difference. First operand has 84 places, 102 transitions, 1013 flow. Second operand 85 states and 9711 transitions. [2022-11-25 17:53:17,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 571 transitions, 6135 flow [2022-11-25 17:53:17,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 571 transitions, 5885 flow, removed 125 selfloop flow, removed 2 redundant places. [2022-11-25 17:53:18,004 INFO L231 Difference]: Finished difference. Result has 187 places, 310 transitions, 4424 flow [2022-11-25 17:53:18,004 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=969, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=85, PETRI_FLOW=4424, PETRI_PLACES=187, PETRI_TRANSITIONS=310} [2022-11-25 17:53:18,005 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 151 predicate places. [2022-11-25 17:53:18,005 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 310 transitions, 4424 flow [2022-11-25 17:53:18,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 110.35135135135135) internal successors, (4083), 37 states have internal predecessors, (4083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:18,006 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:53:18,006 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:53:18,011 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-11-25 17:53:18,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:53:18,207 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-25 17:53:18,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:18,207 INFO L85 PathProgramCache]: Analyzing trace with hash 306269446, now seen corresponding path program 2 times [2022-11-25 17:53:18,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:53:18,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472175398] [2022-11-25 17:53:18,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:18,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:53:18,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:22,235 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:53:22,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:53:22,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472175398] [2022-11-25 17:53:22,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472175398] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:53:22,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005467073] [2022-11-25 17:53:22,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:53:22,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:53:22,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:53:22,237 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:53:22,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-25 17:53:22,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:53:22,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:53:22,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-25 17:53:22,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:53:23,788 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:53:23,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:53:23,998 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:53:23,999 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 20 [2022-11-25 17:53:25,812 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:53:25,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005467073] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:53:25,812 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:53:25,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 30 [2022-11-25 17:53:25,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955955680] [2022-11-25 17:53:25,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:53:25,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-25 17:53:25,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:53:25,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-25 17:53:25,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2022-11-25 17:53:40,104 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 395 [2022-11-25 17:53:40,106 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 310 transitions, 4424 flow. Second operand has 32 states, 32 states have (on average 136.53125) internal successors, (4369), 32 states have internal predecessors, (4369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:40,106 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:53:40,106 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 395 [2022-11-25 17:53:40,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:53:54,738 INFO L130 PetriNetUnfolder]: 9260/17702 cut-off events. [2022-11-25 17:53:54,738 INFO L131 PetriNetUnfolder]: For 214925/214925 co-relation queries the response was YES. [2022-11-25 17:53:54,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112488 conditions, 17702 events. 9260/17702 cut-off events. For 214925/214925 co-relation queries the response was YES. Maximal size of possible extension queue 962. Compared 155887 event pairs, 2256 based on Foata normal form. 346/18048 useless extension candidates. Maximal degree in co-relation 112427. Up to 13200 conditions per place. [2022-11-25 17:53:55,025 INFO L137 encePairwiseOnDemand]: 382/395 looper letters, 296 selfloop transitions, 152 changer transitions 41/489 dead transitions. [2022-11-25 17:53:55,025 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 489 transitions, 7128 flow [2022-11-25 17:53:55,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-25 17:53:55,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-11-25 17:53:55,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 4805 transitions. [2022-11-25 17:53:55,034 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3577810871183917 [2022-11-25 17:53:55,034 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 4805 transitions. [2022-11-25 17:53:55,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 4805 transitions. [2022-11-25 17:53:55,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:53:55,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 4805 transitions. [2022-11-25 17:53:55,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 141.3235294117647) internal successors, (4805), 34 states have internal predecessors, (4805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:55,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 395.0) internal successors, (13825), 35 states have internal predecessors, (13825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:55,058 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 395.0) internal successors, (13825), 35 states have internal predecessors, (13825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:55,058 INFO L175 Difference]: Start difference. First operand has 187 places, 310 transitions, 4424 flow. Second operand 34 states and 4805 transitions. [2022-11-25 17:53:55,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 489 transitions, 7128 flow [2022-11-25 17:53:56,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 489 transitions, 6391 flow, removed 331 selfloop flow, removed 9 redundant places. [2022-11-25 17:53:56,868 INFO L231 Difference]: Finished difference. Result has 222 places, 345 transitions, 4760 flow [2022-11-25 17:53:56,869 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=3429, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=4760, PETRI_PLACES=222, PETRI_TRANSITIONS=345} [2022-11-25 17:53:56,869 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 186 predicate places. [2022-11-25 17:53:56,869 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 345 transitions, 4760 flow [2022-11-25 17:53:56,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 136.53125) internal successors, (4369), 32 states have internal predecessors, (4369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:53:56,870 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:53:56,870 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:53:56,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-25 17:53:57,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-25 17:53:57,071 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-25 17:53:57,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:57,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1374495698, now seen corresponding path program 1 times [2022-11-25 17:53:57,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:53:57,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916966418] [2022-11-25 17:53:57,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:57,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:53:57,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:58,262 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:53:58,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:53:58,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916966418] [2022-11-25 17:53:58,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916966418] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:53:58,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124615421] [2022-11-25 17:53:58,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:58,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:53:58,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:53:58,264 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:53:58,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-25 17:53:58,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:58,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-25 17:53:58,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:53:58,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:53:58,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:53:58,521 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 17:53:58,522 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 [2022-11-25 17:53:58,826 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 [2022-11-25 17:53:58,980 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 17:53:58,980 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 [2022-11-25 17:53:59,138 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 [2022-11-25 17:53:59,186 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 [2022-11-25 17:53:59,321 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 [2022-11-25 17:53:59,482 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 [2022-11-25 17:54:00,027 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:54:00,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:54:01,348 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:54:01,349 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 55 [2022-11-25 17:54:01,379 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:54:01,380 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 297 [2022-11-25 17:54:01,412 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:54:01,412 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 241 [2022-11-25 17:54:01,446 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:54:01,447 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 213 [2022-11-25 17:54:01,492 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:54:01,492 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 105 [2022-11-25 17:54:03,390 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 2 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:54:03,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124615421] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:54:03,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:54:03,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 27 [2022-11-25 17:54:03,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909328373] [2022-11-25 17:54:03,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:54:03,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-25 17:54:03,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:54:03,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-25 17:54:03,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=605, Unknown=13, NotChecked=0, Total=812 [2022-11-25 17:54:06,780 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 395 [2022-11-25 17:54:06,782 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 345 transitions, 4760 flow. Second operand has 29 states, 29 states have (on average 119.72413793103448) internal successors, (3472), 29 states have internal predecessors, (3472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:06,782 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:54:06,782 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 395 [2022-11-25 17:54:06,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:54:15,429 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:54:28,614 INFO L130 PetriNetUnfolder]: 14175/27807 cut-off events. [2022-11-25 17:54:28,614 INFO L131 PetriNetUnfolder]: For 470676/470676 co-relation queries the response was YES. [2022-11-25 17:54:28,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185522 conditions, 27807 events. 14175/27807 cut-off events. For 470676/470676 co-relation queries the response was YES. Maximal size of possible extension queue 1414. Compared 266563 event pairs, 2689 based on Foata normal form. 1600/29385 useless extension candidates. Maximal degree in co-relation 185450. Up to 14571 conditions per place. [2022-11-25 17:54:29,006 INFO L137 encePairwiseOnDemand]: 385/395 looper letters, 380 selfloop transitions, 128 changer transitions 57/565 dead transitions. [2022-11-25 17:54:29,006 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 565 transitions, 9016 flow [2022-11-25 17:54:29,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-25 17:54:29,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-11-25 17:54:29,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3099 transitions. [2022-11-25 17:54:29,150 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3138227848101266 [2022-11-25 17:54:29,150 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3099 transitions. [2022-11-25 17:54:29,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3099 transitions. [2022-11-25 17:54:29,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:54:29,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3099 transitions. [2022-11-25 17:54:29,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 123.96) internal successors, (3099), 25 states have internal predecessors, (3099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:29,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 395.0) internal successors, (10270), 26 states have internal predecessors, (10270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:29,171 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 395.0) internal successors, (10270), 26 states have internal predecessors, (10270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:29,172 INFO L175 Difference]: Start difference. First operand has 222 places, 345 transitions, 4760 flow. Second operand 25 states and 3099 transitions. [2022-11-25 17:54:29,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 565 transitions, 9016 flow [2022-11-25 17:54:34,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 565 transitions, 8573 flow, removed 178 selfloop flow, removed 17 redundant places. [2022-11-25 17:54:34,575 INFO L231 Difference]: Finished difference. Result has 230 places, 322 transitions, 4671 flow [2022-11-25 17:54:34,575 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=3978, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=4671, PETRI_PLACES=230, PETRI_TRANSITIONS=322} [2022-11-25 17:54:34,575 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 194 predicate places. [2022-11-25 17:54:34,576 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 322 transitions, 4671 flow [2022-11-25 17:54:34,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 119.72413793103448) internal successors, (3472), 29 states have internal predecessors, (3472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:34,576 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:54:34,577 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:54:34,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-25 17:54:34,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-25 17:54:34,777 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-25 17:54:34,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:54:34,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1376283158, now seen corresponding path program 2 times [2022-11-25 17:54:34,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:54:34,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418702850] [2022-11-25 17:54:34,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:54:34,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:54:34,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:54:35,891 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:54:35,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:54:35,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418702850] [2022-11-25 17:54:35,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418702850] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:54:35,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485336394] [2022-11-25 17:54:35,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:54:35,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:54:35,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:54:35,894 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:54:35,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-25 17:54:36,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:54:36,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:54:36,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 17:54:36,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:54:36,581 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 17:54:36,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:54:36,694 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:54:36,694 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 25 treesize of output 22 [2022-11-25 17:54:36,936 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:54:36,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485336394] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:54:36,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:54:36,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 4] total 12 [2022-11-25 17:54:36,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825365907] [2022-11-25 17:54:36,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:54:36,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 17:54:36,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:54:36,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 17:54:36,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-25 17:54:41,488 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 395 [2022-11-25 17:54:41,490 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 322 transitions, 4671 flow. Second operand has 14 states, 14 states have (on average 154.35714285714286) internal successors, (2161), 14 states have internal predecessors, (2161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:41,490 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:54:41,491 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 395 [2022-11-25 17:54:41,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:54:52,088 INFO L130 PetriNetUnfolder]: 15252/29266 cut-off events. [2022-11-25 17:54:52,088 INFO L131 PetriNetUnfolder]: For 553447/553447 co-relation queries the response was YES. [2022-11-25 17:54:52,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203231 conditions, 29266 events. 15252/29266 cut-off events. For 553447/553447 co-relation queries the response was YES. Maximal size of possible extension queue 1418. Compared 275426 event pairs, 3691 based on Foata normal form. 716/29960 useless extension candidates. Maximal degree in co-relation 203153. Up to 15006 conditions per place. [2022-11-25 17:54:52,588 INFO L137 encePairwiseOnDemand]: 387/395 looper letters, 359 selfloop transitions, 129 changer transitions 13/501 dead transitions. [2022-11-25 17:54:52,588 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 501 transitions, 8157 flow [2022-11-25 17:54:52,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 17:54:52,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-25 17:54:52,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2391 transitions. [2022-11-25 17:54:52,750 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40354430379746836 [2022-11-25 17:54:52,750 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2391 transitions. [2022-11-25 17:54:52,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2391 transitions. [2022-11-25 17:54:52,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:54:52,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2391 transitions. [2022-11-25 17:54:52,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 159.4) internal successors, (2391), 15 states have internal predecessors, (2391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:52,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 395.0) internal successors, (6320), 16 states have internal predecessors, (6320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:52,767 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 395.0) internal successors, (6320), 16 states have internal predecessors, (6320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:52,769 INFO L175 Difference]: Start difference. First operand has 230 places, 322 transitions, 4671 flow. Second operand 15 states and 2391 transitions. [2022-11-25 17:54:52,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 501 transitions, 8157 flow [2022-11-25 17:54:57,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 501 transitions, 7856 flow, removed 97 selfloop flow, removed 12 redundant places. [2022-11-25 17:54:57,172 INFO L231 Difference]: Finished difference. Result has 230 places, 325 transitions, 4794 flow [2022-11-25 17:54:57,172 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=4286, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4794, PETRI_PLACES=230, PETRI_TRANSITIONS=325} [2022-11-25 17:54:57,173 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 194 predicate places. [2022-11-25 17:54:57,173 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 325 transitions, 4794 flow [2022-11-25 17:54:57,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 154.35714285714286) internal successors, (2161), 14 states have internal predecessors, (2161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:54:57,173 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:54:57,174 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:54:57,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-25 17:54:57,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:54:57,374 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-25 17:54:57,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:54:57,375 INFO L85 PathProgramCache]: Analyzing trace with hash 294844163, now seen corresponding path program 1 times [2022-11-25 17:54:57,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:54:57,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887518181] [2022-11-25 17:54:57,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:54:57,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:54:57,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:55:01,393 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:55:01,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:55:01,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887518181] [2022-11-25 17:55:01,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887518181] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:55:01,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864515302] [2022-11-25 17:55:01,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:55:01,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:55:01,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:55:01,396 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:55:01,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-25 17:55:01,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:55:01,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-25 17:55:01,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:55:01,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:55:01,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:55:01,631 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 17:55:01,631 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 [2022-11-25 17:55:02,013 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 [2022-11-25 17:55:02,267 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 17:55:02,268 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 [2022-11-25 17:55:02,476 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 [2022-11-25 17:55:02,544 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 [2022-11-25 17:55:02,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:55:02,735 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 [2022-11-25 17:55:02,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:55:02,998 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 [2022-11-25 17:55:04,073 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:55:04,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:55:06,067 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:55:06,067 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 [2022-11-25 17:55:06,112 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:55:06,113 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 1427 treesize of output 1361 [2022-11-25 17:55:06,162 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 1342 treesize of output 1286 [2022-11-25 17:55:06,192 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 643 treesize of output 531 [2022-11-25 17:55:06,217 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 1174 treesize of output 950 [2022-11-25 17:55:09,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:55:09,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864515302] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:55:09,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:55:09,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 34 [2022-11-25 17:55:09,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758764843] [2022-11-25 17:55:09,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:55:09,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-25 17:55:09,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:55:09,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-25 17:55:09,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1128, Unknown=5, NotChecked=0, Total=1260 [2022-11-25 17:55:21,975 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 395 [2022-11-25 17:55:21,977 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 325 transitions, 4794 flow. Second operand has 36 states, 36 states have (on average 109.41666666666667) internal successors, (3939), 36 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:21,977 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:55:21,977 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 395 [2022-11-25 17:55:21,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:55:44,803 INFO L130 PetriNetUnfolder]: 15978/30786 cut-off events. [2022-11-25 17:55:44,803 INFO L131 PetriNetUnfolder]: For 544119/544119 co-relation queries the response was YES. [2022-11-25 17:55:45,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212448 conditions, 30786 events. 15978/30786 cut-off events. For 544119/544119 co-relation queries the response was YES. Maximal size of possible extension queue 1472. Compared 292607 event pairs, 4482 based on Foata normal form. 890/31648 useless extension candidates. Maximal degree in co-relation 212370. Up to 17308 conditions per place. [2022-11-25 17:55:45,266 INFO L137 encePairwiseOnDemand]: 383/395 looper letters, 407 selfloop transitions, 100 changer transitions 77/584 dead transitions. [2022-11-25 17:55:45,266 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 584 transitions, 8958 flow [2022-11-25 17:55:45,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-25 17:55:45,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-25 17:55:45,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3760 transitions. [2022-11-25 17:55:45,273 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2884541618718834 [2022-11-25 17:55:45,273 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3760 transitions. [2022-11-25 17:55:45,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3760 transitions. [2022-11-25 17:55:45,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:55:45,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3760 transitions. [2022-11-25 17:55:45,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 113.93939393939394) internal successors, (3760), 33 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:45,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 395.0) internal successors, (13430), 34 states have internal predecessors, (13430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:45,294 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 395.0) internal successors, (13430), 34 states have internal predecessors, (13430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:45,294 INFO L175 Difference]: Start difference. First operand has 230 places, 325 transitions, 4794 flow. Second operand 33 states and 3760 transitions. [2022-11-25 17:55:45,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 584 transitions, 8958 flow [2022-11-25 17:55:56,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 584 transitions, 8504 flow, removed 98 selfloop flow, removed 16 redundant places. [2022-11-25 17:55:56,523 INFO L231 Difference]: Finished difference. Result has 245 places, 313 transitions, 4658 flow [2022-11-25 17:55:56,524 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=4128, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=4658, PETRI_PLACES=245, PETRI_TRANSITIONS=313} [2022-11-25 17:55:56,524 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 209 predicate places. [2022-11-25 17:55:56,525 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 313 transitions, 4658 flow [2022-11-25 17:55:56,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 109.41666666666667) internal successors, (3939), 36 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:55:56,526 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:55:56,526 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:55:56,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-25 17:55:56,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-25 17:55:56,728 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-25 17:55:56,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:55:56,729 INFO L85 PathProgramCache]: Analyzing trace with hash 345079042, now seen corresponding path program 3 times [2022-11-25 17:55:56,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:55:56,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461986151] [2022-11-25 17:55:56,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:55:56,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:55:56,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:56:04,016 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:56:04,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:56:04,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461986151] [2022-11-25 17:56:04,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461986151] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:56:04,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118069109] [2022-11-25 17:56:04,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:56:04,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:56:04,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:56:04,018 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:56:04,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c1b18d-b5a1-4b8e-8b73-592430d9b166/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-25 17:56:04,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 17:56:04,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:56:04,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-25 17:56:04,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:56:06,781 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:56:06,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:56:12,486 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:56:12,487 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 118 [2022-11-25 17:56:14,181 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:56:14,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118069109] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:56:14,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:56:14,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 10] total 35 [2022-11-25 17:56:14,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971356400] [2022-11-25 17:56:14,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:56:14,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-25 17:56:14,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:56:14,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-25 17:56:14,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1185, Unknown=2, NotChecked=0, Total=1332 [2022-11-25 17:56:17,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:56:20,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:56:23,541 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:56:26,352 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:56:29,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:56:31,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:56:35,287 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:56:38,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:56:41,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:56:44,861 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:56:47,696 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:56:51,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:56:53,948 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:56:56,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:00,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:03,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:05,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:08,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:11,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:14,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:16,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:19,071 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:21,374 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:23,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:26,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:29,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:32,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:57:32,782 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 395 [2022-11-25 17:57:32,784 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 313 transitions, 4658 flow. Second operand has 37 states, 37 states have (on average 107.37837837837837) internal successors, (3973), 37 states have internal predecessors, (3973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:57:32,785 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:57:32,785 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 395 [2022-11-25 17:57:32,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:57:58,936 WARN L233 SmtUtils]: Spent 16.09s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:58:03,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:58:25,343 WARN L233 SmtUtils]: Spent 21.06s on a formula simplification. DAG size of input: 143 DAG size of output: 117 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:58:27,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:58:29,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:58:31,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:58:34,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:58:51,390 WARN L233 SmtUtils]: Spent 12.89s on a formula simplification. DAG size of input: 101 DAG size of output: 88 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:59:06,630 WARN L233 SmtUtils]: Spent 10.88s on a formula simplification. DAG size of input: 92 DAG size of output: 87 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:59:32,919 WARN L233 SmtUtils]: Spent 25.44s on a formula simplification. DAG size of input: 104 DAG size of output: 99 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:59:58,155 WARN L233 SmtUtils]: Spent 16.31s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:00:01,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:00:04,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:00:07,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-25 18:00:38,415 WARN L233 SmtUtils]: Spent 16.30s on a formula simplification that was a NOOP. DAG size: 79 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:00:42,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:00:44,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:00:47,734 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-25 18:00:51,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:00:53,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:00:56,908 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:00:58,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:01:00,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:01:02,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:01:05,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:01:07,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:01:09,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:01:11,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:01:13,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:01:15,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:01:18,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:01:20,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:01:22,297 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] [2022-11-25 18:01:30,750 INFO L130 PetriNetUnfolder]: 18311/35722 cut-off events. [2022-11-25 18:01:30,751 INFO L131 PetriNetUnfolder]: For 562224/562224 co-relation queries the response was YES. [2022-11-25 18:01:31,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 241884 conditions, 35722 events. 18311/35722 cut-off events. For 562224/562224 co-relation queries the response was YES. Maximal size of possible extension queue 1800. Compared 353542 event pairs, 6162 based on Foata normal form. 192/35894 useless extension candidates. Maximal degree in co-relation 241804. Up to 27550 conditions per place. [2022-11-25 18:01:31,546 INFO L137 encePairwiseOnDemand]: 382/395 looper letters, 324 selfloop transitions, 188 changer transitions 90/602 dead transitions. [2022-11-25 18:01:31,546 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 602 transitions, 9051 flow [2022-11-25 18:01:31,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-25 18:01:31,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-11-25 18:01:31,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 5346 transitions. [2022-11-25 18:01:31,557 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2819620253164557 [2022-11-25 18:01:31,557 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 5346 transitions. [2022-11-25 18:01:31,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 5346 transitions. [2022-11-25 18:01:31,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:01:31,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 5346 transitions. [2022-11-25 18:01:31,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 111.375) internal successors, (5346), 48 states have internal predecessors, (5346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:01:31,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 395.0) internal successors, (19355), 49 states have internal predecessors, (19355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:01:31,588 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 395.0) internal successors, (19355), 49 states have internal predecessors, (19355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:01:31,588 INFO L175 Difference]: Start difference. First operand has 245 places, 313 transitions, 4658 flow. Second operand 48 states and 5346 transitions. [2022-11-25 18:01:31,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 602 transitions, 9051 flow