./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version e04fb08f 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_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8 --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 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 --- 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-e04fb08 [2022-11-16 12:41:05,997 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:41:05,999 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:41:06,030 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:41:06,031 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:41:06,034 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:41:06,037 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:41:06,040 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:41:06,043 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:41:06,051 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:41:06,052 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:41:06,054 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:41:06,055 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:41:06,057 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:41:06,059 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:41:06,061 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:41:06,063 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:41:06,064 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:41:06,065 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:41:06,071 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:41:06,074 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:41:06,075 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:41:06,078 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:41:06,079 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:41:06,088 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:41:06,089 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:41:06,089 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:41:06,090 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:41:06,092 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:41:06,093 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:41:06,093 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:41:06,095 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:41:06,096 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:41:06,098 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:41:06,100 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:41:06,100 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:41:06,101 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:41:06,101 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:41:06,101 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:41:06,102 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:41:06,103 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:41:06,104 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-16 12:41:06,141 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:41:06,145 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:41:06,146 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:41:06,146 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:41:06,147 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:41:06,147 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:41:06,148 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:41:06,148 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:41:06,149 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:41:06,149 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:41:06,150 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:41:06,150 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 12:41:06,150 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:41:06,151 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:41:06,151 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:41:06,151 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:41:06,151 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:41:06,152 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:41:06,152 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-16 12:41:06,152 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:41:06,152 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:41:06,152 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:41:06,153 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:41:06,153 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:41:06,153 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:41:06,153 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:41:06,154 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:41:06,154 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:41:06,154 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:41:06,154 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:41:06,155 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:41:06,155 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:41:06,155 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:41:06,156 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:41:06,156 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:41:06,156 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 [2022-11-16 12:41:06,529 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:41:06,557 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:41:06,560 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:41:06,561 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:41:06,562 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:41:06,564 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2022-11-16 12:41:06,645 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/data/ce38a1ea0/61b757a4ba2f4ffaa3e94aa72765e103/FLAG6c72bcea8 [2022-11-16 12:41:07,294 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:41:07,294 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2022-11-16 12:41:07,306 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/data/ce38a1ea0/61b757a4ba2f4ffaa3e94aa72765e103/FLAG6c72bcea8 [2022-11-16 12:41:07,637 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/data/ce38a1ea0/61b757a4ba2f4ffaa3e94aa72765e103 [2022-11-16 12:41:07,640 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:41:07,643 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:41:07,648 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:41:07,649 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:41:07,653 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:41:07,654 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:41:07" (1/1) ... [2022-11-16 12:41:07,655 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@279bc75f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:41:07, skipping insertion in model container [2022-11-16 12:41:07,655 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:41:07" (1/1) ... [2022-11-16 12:41:07,664 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:41:07,689 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:41:07,951 WARN L229 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_3a061258-102a-4cf5-8082-7c91fd6601c8/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c[2271,2284] [2022-11-16 12:41:07,962 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:41:07,971 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:41:07,994 WARN L229 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_3a061258-102a-4cf5-8082-7c91fd6601c8/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c[2271,2284] [2022-11-16 12:41:08,001 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:41:08,016 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:41:08,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:41:08 WrapperNode [2022-11-16 12:41:08,017 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:41:08,018 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:41:08,019 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:41:08,019 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:41:08,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:41:08" (1/1) ... [2022-11-16 12:41:08,037 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:41:08" (1/1) ... [2022-11-16 12:41:08,069 INFO L138 Inliner]: procedures = 26, calls = 36, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 172 [2022-11-16 12:41:08,069 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:41:08,070 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:41:08,070 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:41:08,070 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:41:08,080 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:41:08" (1/1) ... [2022-11-16 12:41:08,080 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:41:08" (1/1) ... [2022-11-16 12:41:08,084 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:41:08" (1/1) ... [2022-11-16 12:41:08,086 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:41:08" (1/1) ... [2022-11-16 12:41:08,096 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:41:08" (1/1) ... [2022-11-16 12:41:08,110 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:41:08" (1/1) ... [2022-11-16 12:41:08,112 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:41:08" (1/1) ... [2022-11-16 12:41:08,113 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:41:08" (1/1) ... [2022-11-16 12:41:08,116 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:41:08,119 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:41:08,119 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:41:08,129 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:41:08,132 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:41:08" (1/1) ... [2022-11-16 12:41:08,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:41:08,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:41:08,170 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:41:08,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:41:08,225 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:41:08,225 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:41:08,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 12:41:08,226 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 12:41:08,226 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 12:41:08,227 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 12:41:08,227 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 12:41:08,227 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 12:41:08,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:41:08,227 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 12:41:08,228 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 12:41:08,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 12:41:08,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:41:08,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:41:08,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:41:08,230 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 12:41:08,393 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:41:08,396 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:41:08,946 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:41:09,235 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:41:09,235 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-16 12:41:09,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:41:09 BoogieIcfgContainer [2022-11-16 12:41:09,238 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:41:09,241 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:41:09,242 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:41:09,246 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:41:09,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:41:07" (1/3) ... [2022-11-16 12:41:09,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57bc4b46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:41:09, skipping insertion in model container [2022-11-16 12:41:09,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:41:08" (2/3) ... [2022-11-16 12:41:09,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57bc4b46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:41:09, skipping insertion in model container [2022-11-16 12:41:09,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:41:09" (3/3) ... [2022-11-16 12:41:09,250 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue2.wvr.c [2022-11-16 12:41:09,260 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 12:41:09,272 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:41:09,272 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2022-11-16 12:41:09,272 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 12:41:09,510 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 12:41:09,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 140 transitions, 296 flow [2022-11-16 12:41:09,703 INFO L130 PetriNetUnfolder]: 9/138 cut-off events. [2022-11-16 12:41:09,703 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 12:41:09,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 138 events. 9/138 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 166 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 94. Up to 2 conditions per place. [2022-11-16 12:41:09,710 INFO L82 GeneralOperation]: Start removeDead. Operand has 138 places, 140 transitions, 296 flow [2022-11-16 12:41:09,718 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 118 places, 119 transitions, 247 flow [2022-11-16 12:41:09,728 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:41:09,739 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;@32beca28, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:41:09,739 INFO L358 AbstractCegarLoop]: Starting to check reachability of 36 error locations. [2022-11-16 12:41:09,771 INFO L130 PetriNetUnfolder]: 3/57 cut-off events. [2022-11-16 12:41:09,771 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 12:41:09,772 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:41:09,773 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:41:09,778 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:41:09,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:41:09,786 INFO L85 PathProgramCache]: Analyzing trace with hash -857656626, now seen corresponding path program 1 times [2022-11-16 12:41:09,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:41:09,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132245005] [2022-11-16 12:41:09,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:41:09,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:41:09,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:10,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:10,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:41:10,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132245005] [2022-11-16 12:41:10,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132245005] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:41:10,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:41:10,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:41:10,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298608831] [2022-11-16 12:41:10,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:41:10,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:41:10,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:41:10,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:41:10,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:41:10,294 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 140 [2022-11-16 12:41:10,298 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 119 transitions, 247 flow. Second operand has 4 states, 4 states have (on average 104.5) internal successors, (418), 4 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:10,298 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:41:10,298 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 140 [2022-11-16 12:41:10,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:41:10,777 INFO L130 PetriNetUnfolder]: 157/551 cut-off events. [2022-11-16 12:41:10,777 INFO L131 PetriNetUnfolder]: For 96/106 co-relation queries the response was YES. [2022-11-16 12:41:10,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 875 conditions, 551 events. 157/551 cut-off events. For 96/106 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2778 event pairs, 70 based on Foata normal form. 44/357 useless extension candidates. Maximal degree in co-relation 335. Up to 137 conditions per place. [2022-11-16 12:41:10,788 INFO L137 encePairwiseOnDemand]: 125/140 looper letters, 42 selfloop transitions, 4 changer transitions 2/131 dead transitions. [2022-11-16 12:41:10,788 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 131 transitions, 372 flow [2022-11-16 12:41:10,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:41:10,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 12:41:10,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 579 transitions. [2022-11-16 12:41:10,814 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8271428571428572 [2022-11-16 12:41:10,815 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 579 transitions. [2022-11-16 12:41:10,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 579 transitions. [2022-11-16 12:41:10,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:41:10,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 579 transitions. [2022-11-16 12:41:10,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 115.8) internal successors, (579), 5 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:10,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 140.0) internal successors, (840), 6 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:10,839 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 140.0) internal successors, (840), 6 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:10,842 INFO L175 Difference]: Start difference. First operand has 118 places, 119 transitions, 247 flow. Second operand 5 states and 579 transitions. [2022-11-16 12:41:10,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 131 transitions, 372 flow [2022-11-16 12:41:10,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 131 transitions, 362 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-16 12:41:10,855 INFO L231 Difference]: Finished difference. Result has 118 places, 111 transitions, 250 flow [2022-11-16 12:41:10,857 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=250, PETRI_PLACES=118, PETRI_TRANSITIONS=111} [2022-11-16 12:41:10,863 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 0 predicate places. [2022-11-16 12:41:10,864 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 111 transitions, 250 flow [2022-11-16 12:41:10,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 104.5) internal successors, (418), 4 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:10,864 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:41:10,865 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:41:10,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:41:10,866 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:41:10,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:41:10,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1570965866, now seen corresponding path program 1 times [2022-11-16 12:41:10,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:41:10,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379732839] [2022-11-16 12:41:10,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:41:10,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:41:10,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:11,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:11,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:41:11,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379732839] [2022-11-16 12:41:11,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379732839] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:41:11,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:41:11,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 12:41:11,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149253530] [2022-11-16 12:41:11,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:41:11,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:41:11,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:41:11,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:41:11,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:41:11,118 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 140 [2022-11-16 12:41:11,120 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 111 transitions, 250 flow. Second operand has 7 states, 7 states have (on average 96.0) internal successors, (672), 7 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) [2022-11-16 12:41:11,120 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:41:11,120 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 140 [2022-11-16 12:41:11,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:41:11,515 INFO L130 PetriNetUnfolder]: 144/545 cut-off events. [2022-11-16 12:41:11,515 INFO L131 PetriNetUnfolder]: For 27/32 co-relation queries the response was YES. [2022-11-16 12:41:11,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 890 conditions, 545 events. 144/545 cut-off events. For 27/32 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2818 event pairs, 102 based on Foata normal form. 0/339 useless extension candidates. Maximal degree in co-relation 614. Up to 226 conditions per place. [2022-11-16 12:41:11,519 INFO L137 encePairwiseOnDemand]: 131/140 looper letters, 49 selfloop transitions, 8 changer transitions 2/134 dead transitions. [2022-11-16 12:41:11,520 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 134 transitions, 420 flow [2022-11-16 12:41:11,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:41:11,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-16 12:41:11,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 812 transitions. [2022-11-16 12:41:11,523 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.725 [2022-11-16 12:41:11,523 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 812 transitions. [2022-11-16 12:41:11,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 812 transitions. [2022-11-16 12:41:11,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:41:11,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 812 transitions. [2022-11-16 12:41:11,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 101.5) internal successors, (812), 8 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:11,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 140.0) internal successors, (1260), 9 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:11,530 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 140.0) internal successors, (1260), 9 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:11,530 INFO L175 Difference]: Start difference. First operand has 118 places, 111 transitions, 250 flow. Second operand 8 states and 812 transitions. [2022-11-16 12:41:11,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 134 transitions, 420 flow [2022-11-16 12:41:11,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 134 transitions, 418 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:41:11,534 INFO L231 Difference]: Finished difference. Result has 125 places, 113 transitions, 280 flow [2022-11-16 12:41:11,535 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=280, PETRI_PLACES=125, PETRI_TRANSITIONS=113} [2022-11-16 12:41:11,536 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 7 predicate places. [2022-11-16 12:41:11,536 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 113 transitions, 280 flow [2022-11-16 12:41:11,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 96.0) internal successors, (672), 7 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) [2022-11-16 12:41:11,537 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:41:11,537 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:41:11,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:41:11,538 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:41:11,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:41:11,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1992461929, now seen corresponding path program 1 times [2022-11-16 12:41:11,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:41:11,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522359392] [2022-11-16 12:41:11,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:41:11,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:41:11,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:11,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:11,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:41:11,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522359392] [2022-11-16 12:41:11,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522359392] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:41:11,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485340250] [2022-11-16 12:41:11,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:41:11,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:41:11,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:41:11,802 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:41:11,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:41:11,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:11,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:41:11,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:41:12,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:12,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:41:12,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:12,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485340250] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:41:12,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:41:12,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-16 12:41:12,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040837352] [2022-11-16 12:41:12,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:41:12,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:41:12,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:41:12,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:41:12,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:41:12,194 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 140 [2022-11-16 12:41:12,196 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 113 transitions, 280 flow. Second operand has 12 states, 12 states have (on average 105.66666666666667) internal successors, (1268), 12 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:12,197 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:41:12,197 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 140 [2022-11-16 12:41:12,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:41:13,008 INFO L130 PetriNetUnfolder]: 324/1135 cut-off events. [2022-11-16 12:41:13,008 INFO L131 PetriNetUnfolder]: For 71/71 co-relation queries the response was YES. [2022-11-16 12:41:13,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1833 conditions, 1135 events. 324/1135 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 6525 event pairs, 145 based on Foata normal form. 3/684 useless extension candidates. Maximal degree in co-relation 1655. Up to 132 conditions per place. [2022-11-16 12:41:13,019 INFO L137 encePairwiseOnDemand]: 133/140 looper letters, 88 selfloop transitions, 18 changer transitions 0/190 dead transitions. [2022-11-16 12:41:13,020 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 190 transitions, 690 flow [2022-11-16 12:41:13,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 12:41:13,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-16 12:41:13,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1963 transitions. [2022-11-16 12:41:13,028 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.778968253968254 [2022-11-16 12:41:13,028 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1963 transitions. [2022-11-16 12:41:13,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1963 transitions. [2022-11-16 12:41:13,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:41:13,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1963 transitions. [2022-11-16 12:41:13,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 109.05555555555556) internal successors, (1963), 18 states have internal predecessors, (1963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:13,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 140.0) internal successors, (2660), 19 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:13,045 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 140.0) internal successors, (2660), 19 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:13,045 INFO L175 Difference]: Start difference. First operand has 125 places, 113 transitions, 280 flow. Second operand 18 states and 1963 transitions. [2022-11-16 12:41:13,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 190 transitions, 690 flow [2022-11-16 12:41:13,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 190 transitions, 680 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-16 12:41:13,052 INFO L231 Difference]: Finished difference. Result has 142 places, 125 transitions, 376 flow [2022-11-16 12:41:13,053 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=376, PETRI_PLACES=142, PETRI_TRANSITIONS=125} [2022-11-16 12:41:13,054 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 24 predicate places. [2022-11-16 12:41:13,054 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 125 transitions, 376 flow [2022-11-16 12:41:13,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 105.66666666666667) internal successors, (1268), 12 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:13,055 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:41:13,055 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:41:13,068 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-16 12:41:13,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:41:13,261 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:41:13,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:41:13,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1636778114, now seen corresponding path program 1 times [2022-11-16 12:41:13,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:41:13,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4781016] [2022-11-16 12:41:13,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:41:13,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:41:13,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:13,451 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:13,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:41:13,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4781016] [2022-11-16 12:41:13,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4781016] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:41:13,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709662495] [2022-11-16 12:41:13,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:41:13,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:41:13,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:41:13,454 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:41:13,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:41:13,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:13,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:41:13,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:41:13,614 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:13,614 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:41:13,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709662495] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:41:13,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:41:13,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-16 12:41:13,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645258275] [2022-11-16 12:41:13,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:41:13,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:41:13,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:41:13,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:41:13,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:41:13,617 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 140 [2022-11-16 12:41:13,618 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 125 transitions, 376 flow. Second operand has 6 states, 6 states have (on average 105.33333333333333) internal successors, (632), 6 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:13,618 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:41:13,618 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 140 [2022-11-16 12:41:13,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:41:14,060 INFO L130 PetriNetUnfolder]: 324/1131 cut-off events. [2022-11-16 12:41:14,060 INFO L131 PetriNetUnfolder]: For 108/108 co-relation queries the response was YES. [2022-11-16 12:41:14,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1847 conditions, 1131 events. 324/1131 cut-off events. For 108/108 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 6507 event pairs, 145 based on Foata normal form. 4/681 useless extension candidates. Maximal degree in co-relation 1400. Up to 512 conditions per place. [2022-11-16 12:41:14,072 INFO L137 encePairwiseOnDemand]: 135/140 looper letters, 38 selfloop transitions, 11 changer transitions 0/133 dead transitions. [2022-11-16 12:41:14,072 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 133 transitions, 477 flow [2022-11-16 12:41:14,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:41:14,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 12:41:14,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 762 transitions. [2022-11-16 12:41:14,075 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7775510204081633 [2022-11-16 12:41:14,076 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 762 transitions. [2022-11-16 12:41:14,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 762 transitions. [2022-11-16 12:41:14,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:41:14,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 762 transitions. [2022-11-16 12:41:14,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 108.85714285714286) internal successors, (762), 7 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:14,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 140.0) internal successors, (1120), 8 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:14,082 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 140.0) internal successors, (1120), 8 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:14,082 INFO L175 Difference]: Start difference. First operand has 142 places, 125 transitions, 376 flow. Second operand 7 states and 762 transitions. [2022-11-16 12:41:14,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 133 transitions, 477 flow [2022-11-16 12:41:14,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 133 transitions, 445 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-11-16 12:41:14,091 INFO L231 Difference]: Finished difference. Result has 138 places, 121 transitions, 339 flow [2022-11-16 12:41:14,091 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=339, PETRI_PLACES=138, PETRI_TRANSITIONS=121} [2022-11-16 12:41:14,093 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 20 predicate places. [2022-11-16 12:41:14,094 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 121 transitions, 339 flow [2022-11-16 12:41:14,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 105.33333333333333) internal successors, (632), 6 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:14,094 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:41:14,095 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:41:14,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:41:14,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:41:14,301 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:41:14,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:41:14,301 INFO L85 PathProgramCache]: Analyzing trace with hash -703405267, now seen corresponding path program 1 times [2022-11-16 12:41:14,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:41:14,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365520016] [2022-11-16 12:41:14,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:41:14,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:41:14,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:14,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:14,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:41:14,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365520016] [2022-11-16 12:41:14,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365520016] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:41:14,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:41:14,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 12:41:14,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801906165] [2022-11-16 12:41:14,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:41:14,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:41:14,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:41:14,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:41:14,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:41:14,431 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 140 [2022-11-16 12:41:14,432 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 121 transitions, 339 flow. Second operand has 7 states, 7 states have (on average 96.14285714285714) internal successors, (673), 7 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:14,432 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:41:14,433 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 140 [2022-11-16 12:41:14,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:41:14,974 INFO L130 PetriNetUnfolder]: 482/1402 cut-off events. [2022-11-16 12:41:14,974 INFO L131 PetriNetUnfolder]: For 194/197 co-relation queries the response was YES. [2022-11-16 12:41:14,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2547 conditions, 1402 events. 482/1402 cut-off events. For 194/197 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 8349 event pairs, 350 based on Foata normal form. 3/840 useless extension candidates. Maximal degree in co-relation 2384. Up to 889 conditions per place. [2022-11-16 12:41:15,009 INFO L137 encePairwiseOnDemand]: 131/140 looper letters, 38 selfloop transitions, 6 changer transitions 10/131 dead transitions. [2022-11-16 12:41:15,009 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 131 transitions, 470 flow [2022-11-16 12:41:15,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:41:15,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-16 12:41:15,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 800 transitions. [2022-11-16 12:41:15,013 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7142857142857143 [2022-11-16 12:41:15,014 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 800 transitions. [2022-11-16 12:41:15,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 800 transitions. [2022-11-16 12:41:15,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:41:15,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 800 transitions. [2022-11-16 12:41:15,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 100.0) internal successors, (800), 8 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:15,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 140.0) internal successors, (1260), 9 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:15,021 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 140.0) internal successors, (1260), 9 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:15,022 INFO L175 Difference]: Start difference. First operand has 138 places, 121 transitions, 339 flow. Second operand 8 states and 800 transitions. [2022-11-16 12:41:15,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 131 transitions, 470 flow [2022-11-16 12:41:15,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 131 transitions, 456 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-16 12:41:15,030 INFO L231 Difference]: Finished difference. Result has 142 places, 119 transitions, 329 flow [2022-11-16 12:41:15,031 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=329, PETRI_PLACES=142, PETRI_TRANSITIONS=119} [2022-11-16 12:41:15,035 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 24 predicate places. [2022-11-16 12:41:15,036 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 119 transitions, 329 flow [2022-11-16 12:41:15,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 96.14285714285714) internal successors, (673), 7 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:15,037 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:41:15,037 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:41:15,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 12:41:15,038 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:41:15,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:41:15,039 INFO L85 PathProgramCache]: Analyzing trace with hash -185894540, now seen corresponding path program 1 times [2022-11-16 12:41:15,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:41:15,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753480905] [2022-11-16 12:41:15,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:41:15,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:41:15,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:15,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:41:15,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:41:15,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753480905] [2022-11-16 12:41:15,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753480905] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:41:15,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:41:15,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:41:15,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250472200] [2022-11-16 12:41:15,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:41:15,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:41:15,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:41:15,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:41:15,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:41:15,468 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 140 [2022-11-16 12:41:15,470 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 119 transitions, 329 flow. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:15,471 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:41:15,471 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 140 [2022-11-16 12:41:15,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:41:15,920 INFO L130 PetriNetUnfolder]: 397/1214 cut-off events. [2022-11-16 12:41:15,920 INFO L131 PetriNetUnfolder]: For 79/87 co-relation queries the response was YES. [2022-11-16 12:41:15,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2038 conditions, 1214 events. 397/1214 cut-off events. For 79/87 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 7938 event pairs, 128 based on Foata normal form. 0/730 useless extension candidates. Maximal degree in co-relation 1961. Up to 537 conditions per place. [2022-11-16 12:41:15,931 INFO L137 encePairwiseOnDemand]: 133/140 looper letters, 19 selfloop transitions, 3 changer transitions 0/127 dead transitions. [2022-11-16 12:41:15,931 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 127 transitions, 392 flow [2022-11-16 12:41:15,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:41:15,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:41:15,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 365 transitions. [2022-11-16 12:41:15,934 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8690476190476191 [2022-11-16 12:41:15,935 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 365 transitions. [2022-11-16 12:41:15,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 365 transitions. [2022-11-16 12:41:15,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:41:15,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 365 transitions. [2022-11-16 12:41:15,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:15,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:15,939 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:15,940 INFO L175 Difference]: Start difference. First operand has 142 places, 119 transitions, 329 flow. Second operand 3 states and 365 transitions. [2022-11-16 12:41:15,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 127 transitions, 392 flow [2022-11-16 12:41:15,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 127 transitions, 370 flow, removed 4 selfloop flow, removed 10 redundant places. [2022-11-16 12:41:15,952 INFO L231 Difference]: Finished difference. Result has 131 places, 121 transitions, 332 flow [2022-11-16 12:41:15,952 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=332, PETRI_PLACES=131, PETRI_TRANSITIONS=121} [2022-11-16 12:41:15,957 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 13 predicate places. [2022-11-16 12:41:15,957 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 121 transitions, 332 flow [2022-11-16 12:41:15,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:15,959 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:41:15,960 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:41:15,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 12:41:15,960 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:41:15,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:41:15,961 INFO L85 PathProgramCache]: Analyzing trace with hash -185894545, now seen corresponding path program 1 times [2022-11-16 12:41:15,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:41:15,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083636652] [2022-11-16 12:41:15,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:41:15,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:41:16,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:16,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:16,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:41:16,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083636652] [2022-11-16 12:41:16,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083636652] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:41:16,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010909429] [2022-11-16 12:41:16,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:41:16,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:41:16,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:41:16,803 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:41:16,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:41:16,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:16,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 12:41:16,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:41:17,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 12:41:17,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:41:17,440 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 16 treesize of output 18 [2022-11-16 12:41:17,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:17,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:41:17,741 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_99 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_99) |c_ULTIMATE.start_main_#t~ret8#1.base|) |c_ULTIMATE.start_main_#t~ret8#1.offset|) 9223372039002259456))) is different from false [2022-11-16 12:41:17,758 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_99 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_99) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|) 9223372039002259456))) is different from false [2022-11-16 12:41:17,924 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:41:17,924 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 24 treesize of output 25 [2022-11-16 12:41:17,945 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:41:17,946 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 38 treesize of output 36 [2022-11-16 12:41:18,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:18,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010909429] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:41:18,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:41:18,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 34 [2022-11-16 12:41:18,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720779801] [2022-11-16 12:41:18,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:41:18,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-16 12:41:18,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:41:18,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-16 12:41:18,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=929, Unknown=14, NotChecked=126, Total=1190 [2022-11-16 12:41:18,279 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 140 [2022-11-16 12:41:18,284 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 121 transitions, 332 flow. Second operand has 35 states, 35 states have (on average 82.08571428571429) internal successors, (2873), 35 states have internal predecessors, (2873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:18,284 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:41:18,284 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 140 [2022-11-16 12:41:18,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:41:21,544 INFO L130 PetriNetUnfolder]: 1783/4589 cut-off events. [2022-11-16 12:41:21,544 INFO L131 PetriNetUnfolder]: For 358/464 co-relation queries the response was YES. [2022-11-16 12:41:21,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8803 conditions, 4589 events. 1783/4589 cut-off events. For 358/464 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 36421 event pairs, 668 based on Foata normal form. 4/2997 useless extension candidates. Maximal degree in co-relation 8712. Up to 2002 conditions per place. [2022-11-16 12:41:21,580 INFO L137 encePairwiseOnDemand]: 118/140 looper letters, 70 selfloop transitions, 38 changer transitions 0/173 dead transitions. [2022-11-16 12:41:21,580 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 173 transitions, 681 flow [2022-11-16 12:41:21,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 12:41:21,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-16 12:41:21,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1620 transitions. [2022-11-16 12:41:21,586 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6090225563909775 [2022-11-16 12:41:21,586 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1620 transitions. [2022-11-16 12:41:21,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1620 transitions. [2022-11-16 12:41:21,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:41:21,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1620 transitions. [2022-11-16 12:41:21,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 85.26315789473684) internal successors, (1620), 19 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:21,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 140.0) internal successors, (2800), 20 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:21,599 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 140.0) internal successors, (2800), 20 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:21,600 INFO L175 Difference]: Start difference. First operand has 131 places, 121 transitions, 332 flow. Second operand 19 states and 1620 transitions. [2022-11-16 12:41:21,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 173 transitions, 681 flow [2022-11-16 12:41:21,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 173 transitions, 676 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:41:21,606 INFO L231 Difference]: Finished difference. Result has 158 places, 150 transitions, 555 flow [2022-11-16 12:41:21,607 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=555, PETRI_PLACES=158, PETRI_TRANSITIONS=150} [2022-11-16 12:41:21,607 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 40 predicate places. [2022-11-16 12:41:21,608 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 150 transitions, 555 flow [2022-11-16 12:41:21,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 82.08571428571429) internal successors, (2873), 35 states have internal predecessors, (2873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:21,609 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:41:21,610 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:41:21,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:41:21,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:41:21,816 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:41:21,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:41:21,817 INFO L85 PathProgramCache]: Analyzing trace with hash -185894542, now seen corresponding path program 1 times [2022-11-16 12:41:21,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:41:21,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76900138] [2022-11-16 12:41:21,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:41:21,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:41:21,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:22,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:22,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:41:22,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76900138] [2022-11-16 12:41:22,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76900138] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:41:22,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557621606] [2022-11-16 12:41:22,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:41:22,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:41:22,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:41:22,713 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:41:22,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:41:22,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:22,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 12:41:22,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:41:23,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 12:41:23,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:41:23,375 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 14 treesize of output 16 [2022-11-16 12:41:23,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:23,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:41:23,574 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_122 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_122) c_~A~0.base) c_~A~0.offset) 4294967295)) is different from false [2022-11-16 12:41:23,598 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_122 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_122) |c_ULTIMATE.start_main_#t~ret8#1.base|) |c_ULTIMATE.start_main_#t~ret8#1.offset|) 4294967295)) is different from false [2022-11-16 12:41:23,623 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_122 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_122) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|) 4294967295)) is different from false [2022-11-16 12:41:23,631 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_122 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_122) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 4294967295)) is different from false [2022-11-16 12:41:23,687 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:41:23,687 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 22 treesize of output 23 [2022-11-16 12:41:23,699 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:41:23,700 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 34 treesize of output 32 [2022-11-16 12:41:23,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-16 12:41:23,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557621606] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:41:23,963 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:41:23,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 34 [2022-11-16 12:41:23,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769445936] [2022-11-16 12:41:23,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:41:23,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-16 12:41:23,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:41:23,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-16 12:41:23,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=827, Unknown=4, NotChecked=244, Total=1190 [2022-11-16 12:41:23,971 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 140 [2022-11-16 12:41:23,975 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 150 transitions, 555 flow. Second operand has 35 states, 35 states have (on average 82.08571428571429) internal successors, (2873), 35 states have internal predecessors, (2873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:23,976 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:41:23,976 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 140 [2022-11-16 12:41:23,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:41:27,423 INFO L130 PetriNetUnfolder]: 1861/4845 cut-off events. [2022-11-16 12:41:27,424 INFO L131 PetriNetUnfolder]: For 1074/1239 co-relation queries the response was YES. [2022-11-16 12:41:27,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10253 conditions, 4845 events. 1861/4845 cut-off events. For 1074/1239 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 39197 event pairs, 677 based on Foata normal form. 7/3262 useless extension candidates. Maximal degree in co-relation 10140. Up to 2129 conditions per place. [2022-11-16 12:41:27,466 INFO L137 encePairwiseOnDemand]: 119/140 looper letters, 70 selfloop transitions, 39 changer transitions 0/174 dead transitions. [2022-11-16 12:41:27,466 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 174 transitions, 850 flow [2022-11-16 12:41:27,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 12:41:27,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-16 12:41:27,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1531 transitions. [2022-11-16 12:41:27,471 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6075396825396825 [2022-11-16 12:41:27,472 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1531 transitions. [2022-11-16 12:41:27,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1531 transitions. [2022-11-16 12:41:27,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:41:27,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1531 transitions. [2022-11-16 12:41:27,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 85.05555555555556) internal successors, (1531), 18 states have internal predecessors, (1531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:27,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 140.0) internal successors, (2660), 19 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:27,483 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 140.0) internal successors, (2660), 19 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:27,483 INFO L175 Difference]: Start difference. First operand has 158 places, 150 transitions, 555 flow. Second operand 18 states and 1531 transitions. [2022-11-16 12:41:27,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 174 transitions, 850 flow [2022-11-16 12:41:27,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 174 transitions, 841 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-16 12:41:27,490 INFO L231 Difference]: Finished difference. Result has 171 places, 154 transitions, 658 flow [2022-11-16 12:41:27,491 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=542, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=658, PETRI_PLACES=171, PETRI_TRANSITIONS=154} [2022-11-16 12:41:27,492 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 53 predicate places. [2022-11-16 12:41:27,492 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 154 transitions, 658 flow [2022-11-16 12:41:27,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 82.08571428571429) internal successors, (2873), 35 states have internal predecessors, (2873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:27,493 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:41:27,494 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:41:27,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:41:27,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-16 12:41:27,700 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:41:27,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:41:27,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1743992822, now seen corresponding path program 1 times [2022-11-16 12:41:27,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:41:27,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180366114] [2022-11-16 12:41:27,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:41:27,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:41:27,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:27,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:41:27,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:41:27,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180366114] [2022-11-16 12:41:27,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180366114] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:41:27,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:41:27,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:41:27,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932477034] [2022-11-16 12:41:27,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:41:27,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:41:27,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:41:27,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:41:27,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:41:27,772 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 140 [2022-11-16 12:41:27,772 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 154 transitions, 658 flow. Second operand has 4 states, 4 states have (on average 106.5) internal successors, (426), 4 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:27,773 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:41:27,773 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 140 [2022-11-16 12:41:27,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:41:28,918 INFO L130 PetriNetUnfolder]: 1171/3565 cut-off events. [2022-11-16 12:41:28,918 INFO L131 PetriNetUnfolder]: For 1586/1799 co-relation queries the response was YES. [2022-11-16 12:41:28,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8578 conditions, 3565 events. 1171/3565 cut-off events. For 1586/1799 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 31991 event pairs, 544 based on Foata normal form. 17/2369 useless extension candidates. Maximal degree in co-relation 8478. Up to 1303 conditions per place. [2022-11-16 12:41:28,944 INFO L137 encePairwiseOnDemand]: 134/140 looper letters, 66 selfloop transitions, 7 changer transitions 0/187 dead transitions. [2022-11-16 12:41:28,945 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 187 transitions, 939 flow [2022-11-16 12:41:28,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:41:28,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 12:41:28,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 581 transitions. [2022-11-16 12:41:28,947 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.83 [2022-11-16 12:41:28,947 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 581 transitions. [2022-11-16 12:41:28,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 581 transitions. [2022-11-16 12:41:28,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:41:28,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 581 transitions. [2022-11-16 12:41:28,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 116.2) internal successors, (581), 5 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:28,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 140.0) internal successors, (840), 6 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:28,952 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 140.0) internal successors, (840), 6 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:28,952 INFO L175 Difference]: Start difference. First operand has 171 places, 154 transitions, 658 flow. Second operand 5 states and 581 transitions. [2022-11-16 12:41:28,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 187 transitions, 939 flow [2022-11-16 12:41:28,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 187 transitions, 905 flow, removed 3 selfloop flow, removed 13 redundant places. [2022-11-16 12:41:28,972 INFO L231 Difference]: Finished difference. Result has 165 places, 158 transitions, 679 flow [2022-11-16 12:41:28,973 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=626, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=679, PETRI_PLACES=165, PETRI_TRANSITIONS=158} [2022-11-16 12:41:28,974 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 47 predicate places. [2022-11-16 12:41:28,974 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 158 transitions, 679 flow [2022-11-16 12:41:28,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 106.5) internal successors, (426), 4 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:28,975 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:41:28,975 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:41:28,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 12:41:28,975 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:41:28,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:41:28,976 INFO L85 PathProgramCache]: Analyzing trace with hash -193507723, now seen corresponding path program 1 times [2022-11-16 12:41:28,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:41:28,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807983907] [2022-11-16 12:41:28,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:41:28,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:41:29,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:29,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:29,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:41:29,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807983907] [2022-11-16 12:41:29,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807983907] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:41:29,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795249311] [2022-11-16 12:41:29,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:41:29,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:41:29,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:41:29,779 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:41:29,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:41:29,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:29,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 12:41:29,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:41:30,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 12:41:30,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:41:30,497 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 14 treesize of output 16 [2022-11-16 12:41:30,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:41:30,623 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 14 treesize of output 16 [2022-11-16 12:41:30,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:30,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:41:33,173 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_160 (Array Int Int)) (v_ArrVal_159 (Array Int Int))) (<= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_159) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_160) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|) 4294967295)) is different from false [2022-11-16 12:41:33,318 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:41:33,319 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 25 treesize of output 26 [2022-11-16 12:41:33,332 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:41:33,332 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 126 treesize of output 120 [2022-11-16 12:41:33,340 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 106 treesize of output 102 [2022-11-16 12:41:33,355 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 102 treesize of output 94 [2022-11-16 12:41:34,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:34,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795249311] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:41:34,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:41:34,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2022-11-16 12:41:34,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173990726] [2022-11-16 12:41:34,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:41:34,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-16 12:41:34,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:41:34,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-16 12:41:34,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1381, Unknown=39, NotChecked=76, Total=1640 [2022-11-16 12:41:34,033 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 140 [2022-11-16 12:41:34,038 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 158 transitions, 679 flow. Second operand has 41 states, 41 states have (on average 77.0) internal successors, (3157), 41 states have internal predecessors, (3157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:34,038 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:41:34,038 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 140 [2022-11-16 12:41:34,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:41:38,762 INFO L130 PetriNetUnfolder]: 2662/7427 cut-off events. [2022-11-16 12:41:38,763 INFO L131 PetriNetUnfolder]: For 5174/5575 co-relation queries the response was YES. [2022-11-16 12:41:38,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16703 conditions, 7427 events. 2662/7427 cut-off events. For 5174/5575 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 68466 event pairs, 1135 based on Foata normal form. 34/5217 useless extension candidates. Maximal degree in co-relation 16587. Up to 2255 conditions per place. [2022-11-16 12:41:38,836 INFO L137 encePairwiseOnDemand]: 118/140 looper letters, 114 selfloop transitions, 44 changer transitions 0/221 dead transitions. [2022-11-16 12:41:38,836 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 221 transitions, 1280 flow [2022-11-16 12:41:38,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 12:41:38,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-16 12:41:38,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1547 transitions. [2022-11-16 12:41:38,844 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5815789473684211 [2022-11-16 12:41:38,845 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1547 transitions. [2022-11-16 12:41:38,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1547 transitions. [2022-11-16 12:41:38,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:41:38,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1547 transitions. [2022-11-16 12:41:38,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 81.42105263157895) internal successors, (1547), 19 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:38,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 140.0) internal successors, (2800), 20 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:38,861 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 140.0) internal successors, (2800), 20 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:38,861 INFO L175 Difference]: Start difference. First operand has 165 places, 158 transitions, 679 flow. Second operand 19 states and 1547 transitions. [2022-11-16 12:41:38,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 221 transitions, 1280 flow [2022-11-16 12:41:38,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 221 transitions, 1276 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:41:38,875 INFO L231 Difference]: Finished difference. Result has 186 places, 172 transitions, 961 flow [2022-11-16 12:41:38,876 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=676, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=961, PETRI_PLACES=186, PETRI_TRANSITIONS=172} [2022-11-16 12:41:38,877 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 68 predicate places. [2022-11-16 12:41:38,878 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 172 transitions, 961 flow [2022-11-16 12:41:38,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 77.0) internal successors, (3157), 41 states have internal predecessors, (3157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:38,899 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:41:38,899 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:41:38,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 12:41:39,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 12:41:39,106 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:41:39,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:41:39,106 INFO L85 PathProgramCache]: Analyzing trace with hash -193507726, now seen corresponding path program 1 times [2022-11-16 12:41:39,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:41:39,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16933961] [2022-11-16 12:41:39,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:41:39,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:41:39,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:39,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:39,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:41:39,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16933961] [2022-11-16 12:41:39,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16933961] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:41:39,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541538618] [2022-11-16 12:41:39,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:41:39,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:41:39,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:41:39,924 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:41:39,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 12:41:40,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:40,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-16 12:41:40,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:41:40,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 [2022-11-16 12:41:40,216 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 12:41:40,216 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 [2022-11-16 12:41:40,400 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 11 treesize of output 7 [2022-11-16 12:41:40,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:41:40,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:41:40,856 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 16 treesize of output 18 [2022-11-16 12:41:40,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:40,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:41:42,389 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_188 (Array Int Int)) (v_ArrVal_189 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_188) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_189) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|) 9223372039002259456))) is different from false [2022-11-16 12:41:42,515 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:41:42,516 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 27 treesize of output 28 [2022-11-16 12:41:42,526 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:41:42,527 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 72 treesize of output 70 [2022-11-16 12:41:42,532 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 56 treesize of output 52 [2022-11-16 12:41:42,539 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 26 treesize of output 24 [2022-11-16 12:41:43,154 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 10 treesize of output 8 [2022-11-16 12:41:43,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:43,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541538618] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:41:43,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:41:43,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2022-11-16 12:41:43,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454342955] [2022-11-16 12:41:43,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:41:43,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-16 12:41:43,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:41:43,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-16 12:41:43,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1376, Unknown=38, NotChecked=76, Total=1640 [2022-11-16 12:41:43,207 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 140 [2022-11-16 12:41:43,211 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 172 transitions, 961 flow. Second operand has 41 states, 41 states have (on average 77.0) internal successors, (3157), 41 states have internal predecessors, (3157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:43,211 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:41:43,212 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 140 [2022-11-16 12:41:43,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:41:47,482 INFO L130 PetriNetUnfolder]: 2751/7227 cut-off events. [2022-11-16 12:41:47,482 INFO L131 PetriNetUnfolder]: For 8699/9115 co-relation queries the response was YES. [2022-11-16 12:41:47,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17962 conditions, 7227 events. 2751/7227 cut-off events. For 8699/9115 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 64551 event pairs, 1088 based on Foata normal form. 34/5036 useless extension candidates. Maximal degree in co-relation 17831. Up to 2366 conditions per place. [2022-11-16 12:41:47,559 INFO L137 encePairwiseOnDemand]: 118/140 looper letters, 113 selfloop transitions, 44 changer transitions 0/220 dead transitions. [2022-11-16 12:41:47,559 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 220 transitions, 1426 flow [2022-11-16 12:41:47,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 12:41:47,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-16 12:41:47,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1546 transitions. [2022-11-16 12:41:47,565 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5812030075187969 [2022-11-16 12:41:47,565 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1546 transitions. [2022-11-16 12:41:47,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1546 transitions. [2022-11-16 12:41:47,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:41:47,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1546 transitions. [2022-11-16 12:41:47,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 81.36842105263158) internal successors, (1546), 19 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:47,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 140.0) internal successors, (2800), 20 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:47,577 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 140.0) internal successors, (2800), 20 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:47,578 INFO L175 Difference]: Start difference. First operand has 186 places, 172 transitions, 961 flow. Second operand 19 states and 1546 transitions. [2022-11-16 12:41:47,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 220 transitions, 1426 flow [2022-11-16 12:41:47,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 220 transitions, 1400 flow, removed 0 selfloop flow, removed 13 redundant places. [2022-11-16 12:41:47,608 INFO L231 Difference]: Finished difference. Result has 191 places, 172 transitions, 1021 flow [2022-11-16 12:41:47,609 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=926, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1021, PETRI_PLACES=191, PETRI_TRANSITIONS=172} [2022-11-16 12:41:47,609 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 73 predicate places. [2022-11-16 12:41:47,610 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 172 transitions, 1021 flow [2022-11-16 12:41:47,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 77.0) internal successors, (3157), 41 states have internal predecessors, (3157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:47,611 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:41:47,611 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:41:47,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 12:41:47,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:41:47,817 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:41:47,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:41:47,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1715045518, now seen corresponding path program 1 times [2022-11-16 12:41:47,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:41:47,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261372532] [2022-11-16 12:41:47,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:41:47,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:41:47,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:48,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:48,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:41:48,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261372532] [2022-11-16 12:41:48,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261372532] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:41:48,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92548035] [2022-11-16 12:41:48,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:41:48,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:41:48,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:41:48,694 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:41:48,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 12:41:48,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:48,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-16 12:41:48,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:41:48,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 [2022-11-16 12:41:48,970 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 12:41:48,971 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 [2022-11-16 12:41:49,128 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 11 treesize of output 7 [2022-11-16 12:41:49,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:41:49,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 12:41:49,466 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 14 treesize of output 16 [2022-11-16 12:41:49,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:49,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:41:49,730 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_218 (Array Int Int)) (v_ArrVal_217 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_217) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_218) c_~A~0.base) c_~A~0.offset) 9223372039002259456)) is different from false [2022-11-16 12:41:49,755 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_218 (Array Int Int)) (v_ArrVal_217 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_217) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_218) |c_ULTIMATE.start_main_#t~ret8#1.base|) |c_ULTIMATE.start_main_#t~ret8#1.offset|) 9223372039002259456)) is different from false [2022-11-16 12:41:49,984 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:41:49,986 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 25 treesize of output 26 [2022-11-16 12:41:49,998 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:41:49,998 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 64 treesize of output 62 [2022-11-16 12:41:50,004 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 48 treesize of output 44 [2022-11-16 12:41:50,012 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 22 treesize of output 20 [2022-11-16 12:41:50,644 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 10 treesize of output 8 [2022-11-16 12:41:50,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:50,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92548035] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:41:50,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:41:50,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2022-11-16 12:41:50,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552378895] [2022-11-16 12:41:50,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:41:50,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-16 12:41:50,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:41:50,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-16 12:41:50,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1318, Unknown=20, NotChecked=150, Total=1640 [2022-11-16 12:41:50,691 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 140 [2022-11-16 12:41:50,695 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 172 transitions, 1021 flow. Second operand has 41 states, 41 states have (on average 77.07317073170732) internal successors, (3160), 41 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) [2022-11-16 12:41:50,695 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:41:50,695 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 140 [2022-11-16 12:41:50,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:41:54,465 INFO L130 PetriNetUnfolder]: 2649/6910 cut-off events. [2022-11-16 12:41:54,465 INFO L131 PetriNetUnfolder]: For 13431/13862 co-relation queries the response was YES. [2022-11-16 12:41:54,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21206 conditions, 6910 events. 2649/6910 cut-off events. For 13431/13862 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 67829 event pairs, 971 based on Foata normal form. 4/4917 useless extension candidates. Maximal degree in co-relation 21074. Up to 1790 conditions per place. [2022-11-16 12:41:54,529 INFO L137 encePairwiseOnDemand]: 118/140 looper letters, 128 selfloop transitions, 29 changer transitions 0/232 dead transitions. [2022-11-16 12:41:54,530 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 232 transitions, 1733 flow [2022-11-16 12:41:54,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 12:41:54,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-16 12:41:54,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1618 transitions. [2022-11-16 12:41:54,541 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5778571428571428 [2022-11-16 12:41:54,541 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1618 transitions. [2022-11-16 12:41:54,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1618 transitions. [2022-11-16 12:41:54,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:41:54,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1618 transitions. [2022-11-16 12:41:54,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 80.9) internal successors, (1618), 20 states have internal predecessors, (1618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:54,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 140.0) internal successors, (2940), 21 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:54,560 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 140.0) internal successors, (2940), 21 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:54,560 INFO L175 Difference]: Start difference. First operand has 191 places, 172 transitions, 1021 flow. Second operand 20 states and 1618 transitions. [2022-11-16 12:41:54,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 232 transitions, 1733 flow [2022-11-16 12:41:54,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 232 transitions, 1696 flow, removed 3 selfloop flow, removed 14 redundant places. [2022-11-16 12:41:54,595 INFO L231 Difference]: Finished difference. Result has 199 places, 184 transitions, 1117 flow [2022-11-16 12:41:54,596 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=988, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1117, PETRI_PLACES=199, PETRI_TRANSITIONS=184} [2022-11-16 12:41:54,598 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 81 predicate places. [2022-11-16 12:41:54,598 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 184 transitions, 1117 flow [2022-11-16 12:41:54,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 77.07317073170732) internal successors, (3160), 41 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) [2022-11-16 12:41:54,600 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:41:54,600 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:41:54,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 12:41:54,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 12:41:54,812 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:41:54,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:41:54,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1715045515, now seen corresponding path program 1 times [2022-11-16 12:41:54,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:41:54,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608406917] [2022-11-16 12:41:54,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:41:54,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:41:54,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:55,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:55,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:41:55,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608406917] [2022-11-16 12:41:55,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608406917] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:41:55,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730351988] [2022-11-16 12:41:55,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:41:55,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:41:55,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:41:55,703 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:41:55,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 12:41:55,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:55,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-16 12:41:55,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:41:55,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 [2022-11-16 12:41:55,890 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 12:41:55,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 12:41:56,044 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-11-16 12:41:56,045 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 16 treesize of output 18 [2022-11-16 12:41:56,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 12:41:56,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:41:56,513 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 16 treesize of output 18 [2022-11-16 12:41:56,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:56,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:41:56,857 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_248 (Array Int Int)) (v_ArrVal_247 (Array Int Int))) (<= 0 (+ 4294967295 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_247) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_248) |c_ULTIMATE.start_main_#t~ret8#1.base|) |c_ULTIMATE.start_main_#t~ret8#1.offset|)))) is different from false [2022-11-16 12:41:57,253 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:41:57,254 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 27 treesize of output 28 [2022-11-16 12:41:57,264 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:41:57,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 70 [2022-11-16 12:41:57,280 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 28 treesize of output 26 [2022-11-16 12:41:57,297 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 54 treesize of output 50 [2022-11-16 12:41:57,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:57,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730351988] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:41:57,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:41:57,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 38 [2022-11-16 12:41:57,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791583269] [2022-11-16 12:41:57,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:41:57,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-16 12:41:57,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:41:57,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-16 12:41:57,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1237, Unknown=26, NotChecked=72, Total=1482 [2022-11-16 12:41:57,651 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 140 [2022-11-16 12:41:57,654 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 184 transitions, 1117 flow. Second operand has 39 states, 39 states have (on average 77.1025641025641) internal successors, (3007), 39 states have internal predecessors, (3007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:57,654 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:41:57,654 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 140 [2022-11-16 12:41:57,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:42:00,736 INFO L130 PetriNetUnfolder]: 2607/6795 cut-off events. [2022-11-16 12:42:00,736 INFO L131 PetriNetUnfolder]: For 14059/14468 co-relation queries the response was YES. [2022-11-16 12:42:00,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23023 conditions, 6795 events. 2607/6795 cut-off events. For 14059/14468 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 66309 event pairs, 914 based on Foata normal form. 38/5091 useless extension candidates. Maximal degree in co-relation 22886. Up to 1767 conditions per place. [2022-11-16 12:42:00,810 INFO L137 encePairwiseOnDemand]: 120/140 looper letters, 128 selfloop transitions, 28 changer transitions 0/231 dead transitions. [2022-11-16 12:42:00,810 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 231 transitions, 1783 flow [2022-11-16 12:42:00,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 12:42:00,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-16 12:42:00,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1467 transitions. [2022-11-16 12:42:00,816 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5821428571428572 [2022-11-16 12:42:00,816 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1467 transitions. [2022-11-16 12:42:00,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1467 transitions. [2022-11-16 12:42:00,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:42:00,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1467 transitions. [2022-11-16 12:42:00,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 81.5) internal successors, (1467), 18 states have internal predecessors, (1467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:00,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 140.0) internal successors, (2660), 19 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:00,828 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 140.0) internal successors, (2660), 19 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:00,828 INFO L175 Difference]: Start difference. First operand has 199 places, 184 transitions, 1117 flow. Second operand 18 states and 1467 transitions. [2022-11-16 12:42:00,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 231 transitions, 1783 flow [2022-11-16 12:42:00,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 231 transitions, 1755 flow, removed 0 selfloop flow, removed 14 redundant places. [2022-11-16 12:42:00,877 INFO L231 Difference]: Finished difference. Result has 202 places, 184 transitions, 1145 flow [2022-11-16 12:42:00,878 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=1085, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1145, PETRI_PLACES=202, PETRI_TRANSITIONS=184} [2022-11-16 12:42:00,879 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 84 predicate places. [2022-11-16 12:42:00,879 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 184 transitions, 1145 flow [2022-11-16 12:42:00,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 77.1025641025641) internal successors, (3007), 39 states have internal predecessors, (3007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:00,880 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:42:00,881 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:42:00,887 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-16 12:42:01,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:42:01,087 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:42:01,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:42:01,087 INFO L85 PathProgramCache]: Analyzing trace with hash 953497169, now seen corresponding path program 1 times [2022-11-16 12:42:01,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:42:01,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483888160] [2022-11-16 12:42:01,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:42:01,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:42:01,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:01,391 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:42:01,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:42:01,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483888160] [2022-11-16 12:42:01,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483888160] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:42:01,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367396895] [2022-11-16 12:42:01,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:42:01,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:42:01,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:42:01,395 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:42:01,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 12:42:01,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:01,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 12:42:01,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:42:01,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:42:01,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:42:02,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:42:02,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367396895] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:42:02,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:42:02,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-11-16 12:42:02,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945928463] [2022-11-16 12:42:02,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:42:02,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 12:42:02,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:42:02,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 12:42:02,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2022-11-16 12:42:02,154 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 140 [2022-11-16 12:42:02,157 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 184 transitions, 1145 flow. Second operand has 24 states, 24 states have (on average 86.83333333333333) internal successors, (2084), 24 states have internal predecessors, (2084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:02,157 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:42:02,157 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 140 [2022-11-16 12:42:02,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:42:04,051 INFO L130 PetriNetUnfolder]: 1463/4492 cut-off events. [2022-11-16 12:42:04,051 INFO L131 PetriNetUnfolder]: For 7817/7993 co-relation queries the response was YES. [2022-11-16 12:42:04,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14464 conditions, 4492 events. 1463/4492 cut-off events. For 7817/7993 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 38388 event pairs, 908 based on Foata normal form. 18/3347 useless extension candidates. Maximal degree in co-relation 14332. Up to 2288 conditions per place. [2022-11-16 12:42:04,084 INFO L137 encePairwiseOnDemand]: 124/140 looper letters, 135 selfloop transitions, 23 changer transitions 5/242 dead transitions. [2022-11-16 12:42:04,085 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 242 transitions, 1616 flow [2022-11-16 12:42:04,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 12:42:04,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-16 12:42:04,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1557 transitions. [2022-11-16 12:42:04,089 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6542016806722689 [2022-11-16 12:42:04,089 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1557 transitions. [2022-11-16 12:42:04,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1557 transitions. [2022-11-16 12:42:04,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:42:04,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1557 transitions. [2022-11-16 12:42:04,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 91.58823529411765) internal successors, (1557), 17 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:04,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 140.0) internal successors, (2520), 18 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:04,100 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 140.0) internal successors, (2520), 18 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:04,100 INFO L175 Difference]: Start difference. First operand has 202 places, 184 transitions, 1145 flow. Second operand 17 states and 1557 transitions. [2022-11-16 12:42:04,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 242 transitions, 1616 flow [2022-11-16 12:42:04,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 242 transitions, 1553 flow, removed 11 selfloop flow, removed 18 redundant places. [2022-11-16 12:42:04,140 INFO L231 Difference]: Finished difference. Result has 201 places, 168 transitions, 929 flow [2022-11-16 12:42:04,140 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=929, PETRI_PLACES=201, PETRI_TRANSITIONS=168} [2022-11-16 12:42:04,141 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 83 predicate places. [2022-11-16 12:42:04,141 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 168 transitions, 929 flow [2022-11-16 12:42:04,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 86.83333333333333) internal successors, (2084), 24 states have internal predecessors, (2084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:04,142 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:42:04,142 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:42:04,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 12:42:04,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:42:04,348 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:42:04,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:42:04,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1108723641, now seen corresponding path program 1 times [2022-11-16 12:42:04,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:42:04,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504553069] [2022-11-16 12:42:04,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:42:04,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:42:04,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:04,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:42:04,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:42:04,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504553069] [2022-11-16 12:42:04,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504553069] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:42:04,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:42:04,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:42:04,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311108806] [2022-11-16 12:42:04,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:42:04,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:42:04,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:42:04,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:42:04,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:42:04,431 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 140 [2022-11-16 12:42:04,431 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 168 transitions, 929 flow. Second operand has 4 states, 4 states have (on average 106.75) internal successors, (427), 4 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:04,432 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:42:04,432 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 140 [2022-11-16 12:42:04,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:42:05,709 INFO L130 PetriNetUnfolder]: 1559/4204 cut-off events. [2022-11-16 12:42:05,709 INFO L131 PetriNetUnfolder]: For 10274/10539 co-relation queries the response was YES. [2022-11-16 12:42:05,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17423 conditions, 4204 events. 1559/4204 cut-off events. For 10274/10539 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 39615 event pairs, 306 based on Foata normal form. 4/2998 useless extension candidates. Maximal degree in co-relation 17304. Up to 2050 conditions per place. [2022-11-16 12:42:05,750 INFO L137 encePairwiseOnDemand]: 134/140 looper letters, 77 selfloop transitions, 6 changer transitions 0/209 dead transitions. [2022-11-16 12:42:05,751 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 209 transitions, 1480 flow [2022-11-16 12:42:05,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:42:05,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 12:42:05,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 580 transitions. [2022-11-16 12:42:05,753 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8285714285714286 [2022-11-16 12:42:05,753 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 580 transitions. [2022-11-16 12:42:05,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 580 transitions. [2022-11-16 12:42:05,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:42:05,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 580 transitions. [2022-11-16 12:42:05,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 116.0) internal successors, (580), 5 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:05,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 140.0) internal successors, (840), 6 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:05,758 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 140.0) internal successors, (840), 6 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:05,758 INFO L175 Difference]: Start difference. First operand has 201 places, 168 transitions, 929 flow. Second operand 5 states and 580 transitions. [2022-11-16 12:42:05,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 209 transitions, 1480 flow [2022-11-16 12:42:05,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 209 transitions, 1463 flow, removed 2 selfloop flow, removed 6 redundant places. [2022-11-16 12:42:05,783 INFO L231 Difference]: Finished difference. Result has 202 places, 171 transitions, 954 flow [2022-11-16 12:42:05,784 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=912, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=954, PETRI_PLACES=202, PETRI_TRANSITIONS=171} [2022-11-16 12:42:05,784 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 84 predicate places. [2022-11-16 12:42:05,785 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 171 transitions, 954 flow [2022-11-16 12:42:05,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 106.75) internal successors, (427), 4 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:05,785 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:42:05,785 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:42:05,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-16 12:42:05,786 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:42:05,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:42:05,786 INFO L85 PathProgramCache]: Analyzing trace with hash -175096051, now seen corresponding path program 2 times [2022-11-16 12:42:05,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:42:05,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177618185] [2022-11-16 12:42:05,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:42:05,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:42:05,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:06,669 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:42:06,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:42:06,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177618185] [2022-11-16 12:42:06,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177618185] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:42:06,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262962389] [2022-11-16 12:42:06,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:42:06,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:42:06,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:42:06,679 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:42:06,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 12:42:06,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:42:06,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:42:06,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-16 12:42:06,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:42:07,077 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 [2022-11-16 12:42:07,278 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-16 12:42:07,279 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 1 case distinctions, treesize of input 23 treesize of output 22 [2022-11-16 12:42:07,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:42:07,501 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 14 treesize of output 16 [2022-11-16 12:42:07,591 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:42:07,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:42:07,767 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_309 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_309) |c_ULTIMATE.start_main_#t~ret8#1.base|) |c_ULTIMATE.start_main_#t~ret8#1.offset|) 4294967295)) is different from false [2022-11-16 12:42:07,779 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_309 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_309) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|) 4294967295)) is different from false [2022-11-16 12:42:07,786 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_309 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_309) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 4294967295)) is different from false [2022-11-16 12:42:10,126 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_create_fresh_int_array_~i~2#1_32| Int) (v_ArrVal_309 (Array Int Int)) (v_ArrVal_307 Int)) (or (< |v_ULTIMATE.start_create_fresh_int_array_~i~2#1_32| (+ |c_ULTIMATE.start_create_fresh_int_array_~i~2#1| 1)) (<= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* |v_ULTIMATE.start_create_fresh_int_array_~i~2#1_32| 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) v_ArrVal_307)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_309) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 4294967295))) is different from false [2022-11-16 12:42:10,168 INFO L321 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2022-11-16 12:42:10,168 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 29 treesize of output 35 [2022-11-16 12:42:10,181 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:42:10,182 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 34 treesize of output 32 [2022-11-16 12:42:10,493 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2022-11-16 12:42:10,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262962389] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:42:10,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:42:10,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 42 [2022-11-16 12:42:10,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117422627] [2022-11-16 12:42:10,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:42:10,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-16 12:42:10,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:42:10,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-16 12:42:10,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1326, Unknown=14, NotChecked=308, Total=1806 [2022-11-16 12:42:10,500 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 140 [2022-11-16 12:42:10,503 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 171 transitions, 954 flow. Second operand has 43 states, 43 states have (on average 77.53488372093024) internal successors, (3334), 43 states have internal predecessors, (3334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:10,504 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:42:10,504 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 140 [2022-11-16 12:42:10,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:42:14,813 INFO L130 PetriNetUnfolder]: 2998/8950 cut-off events. [2022-11-16 12:42:14,813 INFO L131 PetriNetUnfolder]: For 19254/19627 co-relation queries the response was YES. [2022-11-16 12:42:14,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30081 conditions, 8950 events. 2998/8950 cut-off events. For 19254/19627 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 90141 event pairs, 1096 based on Foata normal form. 80/7660 useless extension candidates. Maximal degree in co-relation 29943. Up to 3356 conditions per place. [2022-11-16 12:42:14,887 INFO L137 encePairwiseOnDemand]: 116/140 looper letters, 92 selfloop transitions, 58 changer transitions 0/215 dead transitions. [2022-11-16 12:42:14,887 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 215 transitions, 1590 flow [2022-11-16 12:42:14,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 12:42:14,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-16 12:42:14,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1737 transitions. [2022-11-16 12:42:14,891 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.563961038961039 [2022-11-16 12:42:14,891 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1737 transitions. [2022-11-16 12:42:14,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1737 transitions. [2022-11-16 12:42:14,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:42:14,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1737 transitions. [2022-11-16 12:42:14,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 78.95454545454545) internal successors, (1737), 22 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:14,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 140.0) internal successors, (3220), 23 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:14,902 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 140.0) internal successors, (3220), 23 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:14,902 INFO L175 Difference]: Start difference. First operand has 202 places, 171 transitions, 954 flow. Second operand 22 states and 1737 transitions. [2022-11-16 12:42:14,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 215 transitions, 1590 flow [2022-11-16 12:42:14,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 215 transitions, 1587 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:42:14,995 INFO L231 Difference]: Finished difference. Result has 225 places, 183 transitions, 1263 flow [2022-11-16 12:42:14,996 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=951, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1263, PETRI_PLACES=225, PETRI_TRANSITIONS=183} [2022-11-16 12:42:14,996 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 107 predicate places. [2022-11-16 12:42:14,996 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 183 transitions, 1263 flow [2022-11-16 12:42:14,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 77.53488372093024) internal successors, (3334), 43 states have internal predecessors, (3334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:14,998 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:42:14,998 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:42:15,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 12:42:15,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:42:15,204 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:42:15,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:42:15,205 INFO L85 PathProgramCache]: Analyzing trace with hash -103249498, now seen corresponding path program 1 times [2022-11-16 12:42:15,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:42:15,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592794841] [2022-11-16 12:42:15,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:42:15,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:42:15,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:15,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:42:15,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:42:15,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592794841] [2022-11-16 12:42:15,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592794841] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:42:15,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:42:15,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:42:15,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055121499] [2022-11-16 12:42:15,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:42:15,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:42:15,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:42:15,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:42:15,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:42:15,470 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 140 [2022-11-16 12:42:15,471 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 183 transitions, 1263 flow. Second operand has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:15,471 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:42:15,471 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 140 [2022-11-16 12:42:15,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:42:16,152 INFO L130 PetriNetUnfolder]: 353/2493 cut-off events. [2022-11-16 12:42:16,153 INFO L131 PetriNetUnfolder]: For 6496/6605 co-relation queries the response was YES. [2022-11-16 12:42:16,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8096 conditions, 2493 events. 353/2493 cut-off events. For 6496/6605 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 23995 event pairs, 238 based on Foata normal form. 12/2182 useless extension candidates. Maximal degree in co-relation 7965. Up to 865 conditions per place. [2022-11-16 12:42:16,172 INFO L137 encePairwiseOnDemand]: 137/140 looper letters, 29 selfloop transitions, 1 changer transitions 0/177 dead transitions. [2022-11-16 12:42:16,173 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 177 transitions, 1248 flow [2022-11-16 12:42:16,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:42:16,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:42:16,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 353 transitions. [2022-11-16 12:42:16,174 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8404761904761905 [2022-11-16 12:42:16,174 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 353 transitions. [2022-11-16 12:42:16,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 353 transitions. [2022-11-16 12:42:16,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:42:16,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 353 transitions. [2022-11-16 12:42:16,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:16,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:16,177 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:16,177 INFO L175 Difference]: Start difference. First operand has 225 places, 183 transitions, 1263 flow. Second operand 3 states and 353 transitions. [2022-11-16 12:42:16,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 177 transitions, 1248 flow [2022-11-16 12:42:16,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 177 transitions, 1147 flow, removed 2 selfloop flow, removed 18 redundant places. [2022-11-16 12:42:16,201 INFO L231 Difference]: Finished difference. Result has 207 places, 177 transitions, 1089 flow [2022-11-16 12:42:16,201 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=1087, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1089, PETRI_PLACES=207, PETRI_TRANSITIONS=177} [2022-11-16 12:42:16,202 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 89 predicate places. [2022-11-16 12:42:16,202 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 177 transitions, 1089 flow [2022-11-16 12:42:16,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:16,203 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:42:16,203 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:42:16,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-16 12:42:16,204 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:42:16,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:42:16,204 INFO L85 PathProgramCache]: Analyzing trace with hash -175096054, now seen corresponding path program 2 times [2022-11-16 12:42:16,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:42:16,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879776256] [2022-11-16 12:42:16,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:42:16,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:42:16,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:16,988 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:42:16,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:42:16,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879776256] [2022-11-16 12:42:16,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879776256] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:42:16,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579530276] [2022-11-16 12:42:16,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:42:16,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:42:16,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:42:16,995 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:42:17,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 12:42:17,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:42:17,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:42:17,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-16 12:42:17,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:42:17,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 12:42:17,582 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-16 12:42:17,582 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 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 12:42:17,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:42:17,838 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 16 treesize of output 18 [2022-11-16 12:42:17,941 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:42:17,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:42:18,064 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_350 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_350) c_~A~0.base) c_~A~0.offset) 9223372039002259456))) is different from false [2022-11-16 12:42:18,254 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_350 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_350) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 9223372039002259456))) is different from false [2022-11-16 12:42:18,902 INFO L321 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2022-11-16 12:42:18,903 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 31 treesize of output 37 [2022-11-16 12:42:18,915 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:42:18,915 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 38 treesize of output 36 [2022-11-16 12:42:21,238 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2022-11-16 12:42:21,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579530276] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:42:21,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:42:21,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 42 [2022-11-16 12:42:21,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588007646] [2022-11-16 12:42:21,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:42:21,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-16 12:42:21,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:42:21,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-16 12:42:21,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1470, Unknown=16, NotChecked=158, Total=1806 [2022-11-16 12:42:21,244 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 140 [2022-11-16 12:42:21,247 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 177 transitions, 1089 flow. Second operand has 43 states, 43 states have (on average 77.53488372093024) internal successors, (3334), 43 states have internal predecessors, (3334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:21,247 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:42:21,247 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 140 [2022-11-16 12:42:21,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:42:25,673 INFO L130 PetriNetUnfolder]: 2305/7243 cut-off events. [2022-11-16 12:42:25,673 INFO L131 PetriNetUnfolder]: For 18508/18858 co-relation queries the response was YES. [2022-11-16 12:42:25,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23524 conditions, 7243 events. 2305/7243 cut-off events. For 18508/18858 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 70771 event pairs, 877 based on Foata normal form. 83/6562 useless extension candidates. Maximal degree in co-relation 23469. Up to 2659 conditions per place. [2022-11-16 12:42:25,741 INFO L137 encePairwiseOnDemand]: 118/140 looper letters, 89 selfloop transitions, 57 changer transitions 0/211 dead transitions. [2022-11-16 12:42:25,741 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 211 transitions, 1601 flow [2022-11-16 12:42:25,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 12:42:25,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-16 12:42:25,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1739 transitions. [2022-11-16 12:42:25,745 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5646103896103896 [2022-11-16 12:42:25,745 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1739 transitions. [2022-11-16 12:42:25,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1739 transitions. [2022-11-16 12:42:25,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:42:25,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1739 transitions. [2022-11-16 12:42:25,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 79.04545454545455) internal successors, (1739), 22 states have internal predecessors, (1739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:25,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 140.0) internal successors, (3220), 23 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:25,756 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 140.0) internal successors, (3220), 23 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:25,756 INFO L175 Difference]: Start difference. First operand has 207 places, 177 transitions, 1089 flow. Second operand 22 states and 1739 transitions. [2022-11-16 12:42:25,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 211 transitions, 1601 flow [2022-11-16 12:42:25,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 211 transitions, 1600 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:42:25,829 INFO L231 Difference]: Finished difference. Result has 228 places, 181 transitions, 1267 flow [2022-11-16 12:42:25,829 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=1068, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1267, PETRI_PLACES=228, PETRI_TRANSITIONS=181} [2022-11-16 12:42:25,830 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 110 predicate places. [2022-11-16 12:42:25,830 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 181 transitions, 1267 flow [2022-11-16 12:42:25,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 77.53488372093024) internal successors, (3334), 43 states have internal predecessors, (3334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:25,831 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:42:25,831 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:42:25,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 12:42:26,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 12:42:26,031 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:42:26,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:42:26,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1108984869, now seen corresponding path program 1 times [2022-11-16 12:42:26,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:42:26,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007363267] [2022-11-16 12:42:26,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:42:26,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:42:26,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:26,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:42:26,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:42:26,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007363267] [2022-11-16 12:42:26,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007363267] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:42:26,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:42:26,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:42:26,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419180855] [2022-11-16 12:42:26,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:42:26,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:42:26,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:42:26,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:42:26,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:42:26,232 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 140 [2022-11-16 12:42:26,232 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 181 transitions, 1267 flow. Second operand has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:26,233 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:42:26,233 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 140 [2022-11-16 12:42:26,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:42:26,797 INFO L130 PetriNetUnfolder]: 337/1971 cut-off events. [2022-11-16 12:42:26,797 INFO L131 PetriNetUnfolder]: For 7043/7153 co-relation queries the response was YES. [2022-11-16 12:42:26,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6273 conditions, 1971 events. 337/1971 cut-off events. For 7043/7153 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 17188 event pairs, 159 based on Foata normal form. 9/1806 useless extension candidates. Maximal degree in co-relation 6220. Up to 634 conditions per place. [2022-11-16 12:42:26,814 INFO L137 encePairwiseOnDemand]: 137/140 looper letters, 26 selfloop transitions, 1 changer transitions 0/174 dead transitions. [2022-11-16 12:42:26,814 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 174 transitions, 1227 flow [2022-11-16 12:42:26,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:42:26,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:42:26,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 351 transitions. [2022-11-16 12:42:26,817 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8357142857142857 [2022-11-16 12:42:26,817 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 351 transitions. [2022-11-16 12:42:26,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 351 transitions. [2022-11-16 12:42:26,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:42:26,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 351 transitions. [2022-11-16 12:42:26,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:26,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:26,820 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:26,820 INFO L175 Difference]: Start difference. First operand has 228 places, 181 transitions, 1267 flow. Second operand 3 states and 351 transitions. [2022-11-16 12:42:26,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 174 transitions, 1227 flow [2022-11-16 12:42:26,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 174 transitions, 1131 flow, removed 8 selfloop flow, removed 18 redundant places. [2022-11-16 12:42:26,843 INFO L231 Difference]: Finished difference. Result has 210 places, 174 transitions, 1079 flow [2022-11-16 12:42:26,844 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=1077, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1079, PETRI_PLACES=210, PETRI_TRANSITIONS=174} [2022-11-16 12:42:26,844 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 92 predicate places. [2022-11-16 12:42:26,844 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 174 transitions, 1079 flow [2022-11-16 12:42:26,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:26,845 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:42:26,845 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:42:26,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-16 12:42:26,846 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:42:26,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:42:26,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1227340926, now seen corresponding path program 1 times [2022-11-16 12:42:26,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:42:26,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423428530] [2022-11-16 12:42:26,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:42:26,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:42:26,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:27,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:42:27,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:42:27,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423428530] [2022-11-16 12:42:27,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423428530] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:42:27,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580928437] [2022-11-16 12:42:27,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:42:27,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:42:27,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:42:27,099 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:42:27,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 12:42:27,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:27,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 12:42:27,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:42:27,568 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:42:27,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:42:27,943 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:42:27,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580928437] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:42:27,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:42:27,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-11-16 12:42:27,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203078246] [2022-11-16 12:42:27,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:42:27,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 12:42:27,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:42:27,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 12:42:27,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2022-11-16 12:42:27,947 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 140 [2022-11-16 12:42:27,949 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 174 transitions, 1079 flow. Second operand has 24 states, 24 states have (on average 86.875) internal successors, (2085), 24 states have internal predecessors, (2085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:27,949 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:42:27,949 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 140 [2022-11-16 12:42:27,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:42:29,244 INFO L130 PetriNetUnfolder]: 1255/3480 cut-off events. [2022-11-16 12:42:29,245 INFO L131 PetriNetUnfolder]: For 10530/10629 co-relation queries the response was YES. [2022-11-16 12:42:29,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12276 conditions, 3480 events. 1255/3480 cut-off events. For 10530/10629 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 27320 event pairs, 710 based on Foata normal form. 29/3271 useless extension candidates. Maximal degree in co-relation 12224. Up to 2264 conditions per place. [2022-11-16 12:42:29,270 INFO L137 encePairwiseOnDemand]: 124/140 looper letters, 62 selfloop transitions, 14 changer transitions 62/218 dead transitions. [2022-11-16 12:42:29,270 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 218 transitions, 1567 flow [2022-11-16 12:42:29,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 12:42:29,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-16 12:42:29,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1524 transitions. [2022-11-16 12:42:29,274 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6403361344537815 [2022-11-16 12:42:29,274 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1524 transitions. [2022-11-16 12:42:29,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1524 transitions. [2022-11-16 12:42:29,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:42:29,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1524 transitions. [2022-11-16 12:42:29,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 89.6470588235294) internal successors, (1524), 17 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:29,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 140.0) internal successors, (2520), 18 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:29,282 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 140.0) internal successors, (2520), 18 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:29,283 INFO L175 Difference]: Start difference. First operand has 210 places, 174 transitions, 1079 flow. Second operand 17 states and 1524 transitions. [2022-11-16 12:42:29,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 218 transitions, 1567 flow [2022-11-16 12:42:29,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 218 transitions, 1563 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-16 12:42:29,310 INFO L231 Difference]: Finished difference. Result has 225 places, 146 transitions, 843 flow [2022-11-16 12:42:29,310 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=1050, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=843, PETRI_PLACES=225, PETRI_TRANSITIONS=146} [2022-11-16 12:42:29,311 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 107 predicate places. [2022-11-16 12:42:29,311 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 146 transitions, 843 flow [2022-11-16 12:42:29,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 86.875) internal successors, (2085), 24 states have internal predecessors, (2085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:29,312 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:42:29,312 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:42:29,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 12:42:29,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:42:29,518 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:42:29,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:42:29,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1989913476, now seen corresponding path program 2 times [2022-11-16 12:42:29,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:42:29,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244714713] [2022-11-16 12:42:29,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:42:29,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:42:29,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:30,496 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:42:30,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:42:30,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244714713] [2022-11-16 12:42:30,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244714713] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:42:30,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882284663] [2022-11-16 12:42:30,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:42:30,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:42:30,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:42:30,497 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:42:30,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 12:42:30,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:42:30,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:42:30,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-16 12:42:30,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:42:30,912 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 [2022-11-16 12:42:31,158 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-16 12:42:31,158 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 1 case distinctions, treesize of input 23 treesize of output 22 [2022-11-16 12:42:31,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:42:31,439 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 14 treesize of output 16 [2022-11-16 12:42:31,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:42:31,589 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 14 treesize of output 16 [2022-11-16 12:42:31,635 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:42:31,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:42:31,787 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_420 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_420) c_~A~0.base) c_~A~0.offset) 4294967295)) is different from false [2022-11-16 12:42:34,628 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_create_fresh_int_array_~i~2#1_43| Int) (v_ArrVal_419 (Array Int Int)) (v_ArrVal_417 Int) (v_ArrVal_420 (Array Int Int))) (or (< |v_ULTIMATE.start_create_fresh_int_array_~i~2#1_43| (+ |c_ULTIMATE.start_create_fresh_int_array_~i~2#1| 1)) (<= (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* |v_ULTIMATE.start_create_fresh_int_array_~i~2#1_43| 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) v_ArrVal_417)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_419) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_420) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 4294967295))) is different from false [2022-11-16 12:42:34,668 INFO L321 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2022-11-16 12:42:34,668 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 32 treesize of output 38 [2022-11-16 12:42:34,680 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:42:34,680 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 64 treesize of output 62 [2022-11-16 12:42:34,686 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 48 treesize of output 44 [2022-11-16 12:42:34,692 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 22 treesize of output 20 [2022-11-16 12:42:35,191 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-16 12:42:35,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882284663] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:42:35,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:42:35,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 47 [2022-11-16 12:42:35,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330119881] [2022-11-16 12:42:35,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:42:35,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-16 12:42:35,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:42:35,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-16 12:42:35,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1852, Unknown=43, NotChecked=178, Total=2256 [2022-11-16 12:42:35,198 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 140 [2022-11-16 12:42:35,202 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 146 transitions, 843 flow. Second operand has 48 states, 48 states have (on average 75.33333333333333) internal successors, (3616), 48 states have internal predecessors, (3616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:35,202 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:42:35,202 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 140 [2022-11-16 12:42:35,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:42:38,894 INFO L130 PetriNetUnfolder]: 1438/4733 cut-off events. [2022-11-16 12:42:38,895 INFO L131 PetriNetUnfolder]: For 14167/14374 co-relation queries the response was YES. [2022-11-16 12:42:38,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15028 conditions, 4733 events. 1438/4733 cut-off events. For 14167/14374 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 44242 event pairs, 846 based on Foata normal form. 54/4604 useless extension candidates. Maximal degree in co-relation 14986. Up to 954 conditions per place. [2022-11-16 12:42:38,940 INFO L137 encePairwiseOnDemand]: 119/140 looper letters, 68 selfloop transitions, 37 changer transitions 0/166 dead transitions. [2022-11-16 12:42:38,940 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 166 transitions, 1160 flow [2022-11-16 12:42:38,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 12:42:38,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-16 12:42:38,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1609 transitions. [2022-11-16 12:42:38,944 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5472789115646258 [2022-11-16 12:42:38,945 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1609 transitions. [2022-11-16 12:42:38,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1609 transitions. [2022-11-16 12:42:38,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:42:38,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1609 transitions. [2022-11-16 12:42:38,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 76.61904761904762) internal successors, (1609), 21 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:38,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 140.0) internal successors, (3080), 22 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:38,955 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 140.0) internal successors, (3080), 22 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:38,955 INFO L175 Difference]: Start difference. First operand has 225 places, 146 transitions, 843 flow. Second operand 21 states and 1609 transitions. [2022-11-16 12:42:38,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 166 transitions, 1160 flow [2022-11-16 12:42:39,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 166 transitions, 963 flow, removed 17 selfloop flow, removed 32 redundant places. [2022-11-16 12:42:39,119 INFO L231 Difference]: Finished difference. Result has 193 places, 148 transitions, 799 flow [2022-11-16 12:42:39,120 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=679, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=799, PETRI_PLACES=193, PETRI_TRANSITIONS=148} [2022-11-16 12:42:39,120 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 75 predicate places. [2022-11-16 12:42:39,121 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 148 transitions, 799 flow [2022-11-16 12:42:39,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 75.33333333333333) internal successors, (3616), 48 states have internal predecessors, (3616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:39,121 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:42:39,122 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:42:39,134 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-16 12:42:39,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-16 12:42:39,328 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:42:39,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:42:39,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1698165949, now seen corresponding path program 2 times [2022-11-16 12:42:39,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:42:39,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501348897] [2022-11-16 12:42:39,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:42:39,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:42:39,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:40,349 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:42:40,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:42:40,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501348897] [2022-11-16 12:42:40,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501348897] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:42:40,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49768457] [2022-11-16 12:42:40,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:42:40,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:42:40,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:42:40,352 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:42:40,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 12:42:40,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:42:40,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:42:40,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-16 12:42:40,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:42:40,870 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 [2022-11-16 12:42:41,176 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-16 12:42:41,176 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 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 12:42:41,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:42:41,547 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 16 treesize of output 18 [2022-11-16 12:42:41,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:42:41,709 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 16 treesize of output 18 [2022-11-16 12:42:41,772 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:42:41,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:42:42,639 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_454 (Array Int Int)) (v_ArrVal_453 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_453) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_454) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 9223372039002259456))) is different from false [2022-11-16 12:42:43,497 INFO L321 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2022-11-16 12:42:43,498 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 34 treesize of output 40 [2022-11-16 12:42:43,514 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:42:43,516 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 72 treesize of output 70 [2022-11-16 12:42:43,521 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 56 treesize of output 52 [2022-11-16 12:42:43,528 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 26 treesize of output 24 [2022-11-16 12:42:44,085 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2022-11-16 12:42:44,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49768457] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:42:44,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:42:44,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 47 [2022-11-16 12:42:44,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098657986] [2022-11-16 12:42:44,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:42:44,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-16 12:42:44,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:42:44,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-16 12:42:44,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1935, Unknown=48, NotChecked=90, Total=2256 [2022-11-16 12:42:44,091 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 140 [2022-11-16 12:42:44,095 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 148 transitions, 799 flow. Second operand has 48 states, 48 states have (on average 75.33333333333333) internal successors, (3616), 48 states have internal predecessors, (3616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:44,095 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:42:44,095 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 140 [2022-11-16 12:42:44,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:42:48,062 INFO L130 PetriNetUnfolder]: 1375/4568 cut-off events. [2022-11-16 12:42:48,063 INFO L131 PetriNetUnfolder]: For 9291/9507 co-relation queries the response was YES. [2022-11-16 12:42:48,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11829 conditions, 4568 events. 1375/4568 cut-off events. For 9291/9507 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 42458 event pairs, 786 based on Foata normal form. 54/4244 useless extension candidates. Maximal degree in co-relation 11802. Up to 951 conditions per place. [2022-11-16 12:42:48,096 INFO L137 encePairwiseOnDemand]: 118/140 looper letters, 66 selfloop transitions, 38 changer transitions 0/165 dead transitions. [2022-11-16 12:42:48,096 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 165 transitions, 1052 flow [2022-11-16 12:42:48,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 12:42:48,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-16 12:42:48,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1681 transitions. [2022-11-16 12:42:48,101 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5457792207792208 [2022-11-16 12:42:48,101 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1681 transitions. [2022-11-16 12:42:48,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1681 transitions. [2022-11-16 12:42:48,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:42:48,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1681 transitions. [2022-11-16 12:42:48,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 76.4090909090909) internal successors, (1681), 22 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:48,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 140.0) internal successors, (3220), 23 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:48,108 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 140.0) internal successors, (3220), 23 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:48,108 INFO L175 Difference]: Start difference. First operand has 193 places, 148 transitions, 799 flow. Second operand 22 states and 1681 transitions. [2022-11-16 12:42:48,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 165 transitions, 1052 flow [2022-11-16 12:42:48,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 165 transitions, 1002 flow, removed 0 selfloop flow, removed 18 redundant places. [2022-11-16 12:42:48,130 INFO L231 Difference]: Finished difference. Result has 196 places, 147 transitions, 816 flow [2022-11-16 12:42:48,130 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=740, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=816, PETRI_PLACES=196, PETRI_TRANSITIONS=147} [2022-11-16 12:42:48,130 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 78 predicate places. [2022-11-16 12:42:48,131 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 147 transitions, 816 flow [2022-11-16 12:42:48,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 75.33333333333333) internal successors, (3616), 48 states have internal predecessors, (3616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:48,132 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:42:48,132 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:42:48,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 12:42:48,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:42:48,334 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:42:48,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:42:48,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1033281331, now seen corresponding path program 2 times [2022-11-16 12:42:48,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:42:48,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636154490] [2022-11-16 12:42:48,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:42:48,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:42:48,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:49,426 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:42:49,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:42:49,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636154490] [2022-11-16 12:42:49,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636154490] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:42:49,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506938843] [2022-11-16 12:42:49,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:42:49,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:42:49,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:42:49,429 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:42:49,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 12:42:49,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:42:49,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:42:49,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-16 12:42:49,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:42:50,046 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 [2022-11-16 12:42:50,387 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-16 12:42:50,387 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 1 case distinctions, treesize of input 23 treesize of output 22 [2022-11-16 12:42:50,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:42:50,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 12:42:50,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:42:50,839 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 14 treesize of output 16 [2022-11-16 12:42:50,934 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:42:50,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:42:51,025 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_488 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_488) c_~A~0.base) c_~A~0.offset) 9223372039002259456)) is different from false [2022-11-16 12:42:51,166 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_487 (Array Int Int)) (v_ArrVal_488 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_487) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_488) |c_ULTIMATE.start_main_#t~ret8#1.base|) |c_ULTIMATE.start_main_#t~ret8#1.offset|) 9223372039002259456)) is different from false [2022-11-16 12:42:51,295 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_487 (Array Int Int)) (v_ArrVal_488 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_487) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_488) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 9223372039002259456)) is different from false [2022-11-16 12:42:51,861 INFO L321 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2022-11-16 12:42:51,861 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 32 treesize of output 38 [2022-11-16 12:42:51,871 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:42:51,871 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 64 treesize of output 62 [2022-11-16 12:42:51,878 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 24 treesize of output 22 [2022-11-16 12:42:51,886 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 46 treesize of output 42 [2022-11-16 12:42:54,433 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2022-11-16 12:42:54,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506938843] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:42:54,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:42:54,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 48 [2022-11-16 12:42:54,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472942158] [2022-11-16 12:42:54,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:42:54,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-16 12:42:54,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:42:54,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-16 12:42:54,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1861, Unknown=33, NotChecked=270, Total=2352 [2022-11-16 12:42:54,438 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 140 [2022-11-16 12:42:54,440 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 147 transitions, 816 flow. Second operand has 49 states, 49 states have (on average 72.46938775510205) internal successors, (3551), 49 states have internal predecessors, (3551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:54,440 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:42:54,440 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 140 [2022-11-16 12:42:54,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:42:58,067 INFO L130 PetriNetUnfolder]: 1369/3641 cut-off events. [2022-11-16 12:42:58,067 INFO L131 PetriNetUnfolder]: For 13092/13521 co-relation queries the response was YES. [2022-11-16 12:42:58,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11868 conditions, 3641 events. 1369/3641 cut-off events. For 13092/13521 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 32058 event pairs, 324 based on Foata normal form. 111/3485 useless extension candidates. Maximal degree in co-relation 11841. Up to 990 conditions per place. [2022-11-16 12:42:58,091 INFO L137 encePairwiseOnDemand]: 119/140 looper letters, 78 selfloop transitions, 28 changer transitions 0/169 dead transitions. [2022-11-16 12:42:58,091 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 169 transitions, 1183 flow [2022-11-16 12:42:58,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 12:42:58,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-16 12:42:58,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1547 transitions. [2022-11-16 12:42:58,094 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5261904761904762 [2022-11-16 12:42:58,095 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1547 transitions. [2022-11-16 12:42:58,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1547 transitions. [2022-11-16 12:42:58,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:42:58,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1547 transitions. [2022-11-16 12:42:58,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 73.66666666666667) internal successors, (1547), 21 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:58,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 140.0) internal successors, (3080), 22 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:58,100 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 140.0) internal successors, (3080), 22 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:58,100 INFO L175 Difference]: Start difference. First operand has 196 places, 147 transitions, 816 flow. Second operand 21 states and 1547 transitions. [2022-11-16 12:42:58,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 169 transitions, 1183 flow [2022-11-16 12:42:58,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 169 transitions, 1120 flow, removed 3 selfloop flow, removed 20 redundant places. [2022-11-16 12:42:58,121 INFO L231 Difference]: Finished difference. Result has 198 places, 149 transitions, 833 flow [2022-11-16 12:42:58,122 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=757, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=833, PETRI_PLACES=198, PETRI_TRANSITIONS=149} [2022-11-16 12:42:58,122 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 80 predicate places. [2022-11-16 12:42:58,123 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 149 transitions, 833 flow [2022-11-16 12:42:58,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 72.46938775510205) internal successors, (3551), 49 states have internal predecessors, (3551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:58,124 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:42:58,124 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:42:58,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-16 12:42:58,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:42:58,334 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:42:58,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:42:58,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1033281328, now seen corresponding path program 2 times [2022-11-16 12:42:58,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:42:58,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936803132] [2022-11-16 12:42:58,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:42:58,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:42:58,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:59,294 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:42:59,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:42:59,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936803132] [2022-11-16 12:42:59,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936803132] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:42:59,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788657576] [2022-11-16 12:42:59,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:42:59,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:42:59,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:42:59,297 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:42:59,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 12:42:59,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:42:59,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:42:59,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-16 12:42:59,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:42:59,716 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 [2022-11-16 12:42:59,948 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-16 12:42:59,949 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 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 12:43:00,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:43:00,290 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 16 treesize of output 18 [2022-11-16 12:43:00,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:43:00,383 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 16 treesize of output 18 [2022-11-16 12:43:00,480 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:43:00,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:43:00,593 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_522 (Array Int Int))) (<= 0 (+ 4294967295 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_522) c_~A~0.base) c_~A~0.offset)))) is different from false [2022-11-16 12:43:00,617 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_522 (Array Int Int)) (v_ArrVal_521 (Array Int Int))) (<= 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_521) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_522) c_~A~0.base) c_~A~0.offset) 4294967295))) is different from false [2022-11-16 12:43:01,168 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_522 (Array Int Int)) (v_ArrVal_521 (Array Int Int))) (<= 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_521) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_522) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|) 4294967295))) is different from false [2022-11-16 12:43:01,175 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_522 (Array Int Int)) (v_ArrVal_521 (Array Int Int))) (<= 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_521) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_522) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 4294967295))) is different from false [2022-11-16 12:43:03,625 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_create_fresh_int_array_~i~2#1_55| Int) (v_ArrVal_519 Int) (v_ArrVal_522 (Array Int Int)) (v_ArrVal_521 (Array Int Int))) (or (< |v_ULTIMATE.start_create_fresh_int_array_~i~2#1_55| (+ |c_ULTIMATE.start_create_fresh_int_array_~i~2#1| 1)) (<= 0 (+ 4294967295 (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* |v_ULTIMATE.start_create_fresh_int_array_~i~2#1_55| 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) v_ArrVal_519)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_521) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_522) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))))) is different from false [2022-11-16 12:43:03,675 INFO L321 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2022-11-16 12:43:03,675 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 34 treesize of output 40 [2022-11-16 12:43:03,689 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:43:03,689 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 72 treesize of output 70 [2022-11-16 12:43:03,695 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 56 treesize of output 52 [2022-11-16 12:43:03,703 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 26 treesize of output 24 [2022-11-16 12:43:04,244 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2022-11-16 12:43:04,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788657576] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:43:04,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:43:04,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 47 [2022-11-16 12:43:04,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202312773] [2022-11-16 12:43:04,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:43:04,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-16 12:43:04,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:43:04,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-16 12:43:04,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1637, Unknown=11, NotChecked=430, Total=2256 [2022-11-16 12:43:04,253 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 140 [2022-11-16 12:43:04,257 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 149 transitions, 833 flow. Second operand has 48 states, 48 states have (on average 75.39583333333333) internal successors, (3619), 48 states have internal predecessors, (3619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:04,257 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:43:04,257 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 140 [2022-11-16 12:43:04,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:43:08,450 INFO L130 PetriNetUnfolder]: 1412/3842 cut-off events. [2022-11-16 12:43:08,450 INFO L131 PetriNetUnfolder]: For 12426/12583 co-relation queries the response was YES. [2022-11-16 12:43:08,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12972 conditions, 3842 events. 1412/3842 cut-off events. For 12426/12583 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 33139 event pairs, 536 based on Foata normal form. 60/3824 useless extension candidates. Maximal degree in co-relation 12944. Up to 1240 conditions per place. [2022-11-16 12:43:08,476 INFO L137 encePairwiseOnDemand]: 119/140 looper letters, 130 selfloop transitions, 29 changer transitions 0/225 dead transitions. [2022-11-16 12:43:08,476 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 225 transitions, 1714 flow [2022-11-16 12:43:08,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 12:43:08,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-16 12:43:08,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1720 transitions. [2022-11-16 12:43:08,479 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5584415584415584 [2022-11-16 12:43:08,479 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1720 transitions. [2022-11-16 12:43:08,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1720 transitions. [2022-11-16 12:43:08,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:43:08,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1720 transitions. [2022-11-16 12:43:08,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 78.18181818181819) internal successors, (1720), 22 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:08,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 140.0) internal successors, (3220), 23 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:08,496 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 140.0) internal successors, (3220), 23 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:08,496 INFO L175 Difference]: Start difference. First operand has 198 places, 149 transitions, 833 flow. Second operand 22 states and 1720 transitions. [2022-11-16 12:43:08,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 225 transitions, 1714 flow [2022-11-16 12:43:08,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 225 transitions, 1658 flow, removed 0 selfloop flow, removed 18 redundant places. [2022-11-16 12:43:08,514 INFO L231 Difference]: Finished difference. Result has 208 places, 161 transitions, 951 flow [2022-11-16 12:43:08,515 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=786, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=951, PETRI_PLACES=208, PETRI_TRANSITIONS=161} [2022-11-16 12:43:08,515 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 90 predicate places. [2022-11-16 12:43:08,515 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 161 transitions, 951 flow [2022-11-16 12:43:08,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 75.39583333333333) internal successors, (3619), 48 states have internal predecessors, (3619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:08,516 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:43:08,516 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:43:08,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 12:43:08,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:43:08,717 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:43:08,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:43:08,717 INFO L85 PathProgramCache]: Analyzing trace with hash 613350486, now seen corresponding path program 2 times [2022-11-16 12:43:08,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:43:08,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904447510] [2022-11-16 12:43:08,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:43:08,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:43:08,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:43:09,739 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:43:09,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:43:09,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904447510] [2022-11-16 12:43:09,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904447510] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:43:09,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885756651] [2022-11-16 12:43:09,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:43:09,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:43:09,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:43:09,741 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:43:09,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 12:43:09,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:43:09,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:43:09,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-16 12:43:09,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:43:10,205 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 [2022-11-16 12:43:10,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:43:10,458 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 16 treesize of output 18 [2022-11-16 12:43:10,680 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:43:10,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:43:10,917 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_549 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_549) c_~A~0.base) (+ c_~A~0.offset 4)) 4294967295)) is different from false [2022-11-16 12:43:11,114 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_549 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_549) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967295)) is different from false [2022-11-16 12:43:11,151 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:43:11,152 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 24 treesize of output 25 [2022-11-16 12:43:11,162 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:43:11,162 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 38 treesize of output 34 [2022-11-16 12:43:11,613 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2022-11-16 12:43:11,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885756651] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:43:11,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:43:11,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 46 [2022-11-16 12:43:11,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413198281] [2022-11-16 12:43:11,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:43:11,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-16 12:43:11,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:43:11,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-16 12:43:11,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1804, Unknown=10, NotChecked=174, Total=2162 [2022-11-16 12:43:11,620 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 140 [2022-11-16 12:43:11,624 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 161 transitions, 951 flow. Second operand has 47 states, 47 states have (on average 72.76595744680851) internal successors, (3420), 47 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:11,624 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:43:11,624 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 140 [2022-11-16 12:43:11,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:43:16,283 INFO L130 PetriNetUnfolder]: 1936/5672 cut-off events. [2022-11-16 12:43:16,283 INFO L131 PetriNetUnfolder]: For 14034/14721 co-relation queries the response was YES. [2022-11-16 12:43:16,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18190 conditions, 5672 events. 1936/5672 cut-off events. For 14034/14721 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 52567 event pairs, 906 based on Foata normal form. 575/5883 useless extension candidates. Maximal degree in co-relation 18155. Up to 2159 conditions per place. [2022-11-16 12:43:16,327 INFO L137 encePairwiseOnDemand]: 117/140 looper letters, 123 selfloop transitions, 58 changer transitions 0/239 dead transitions. [2022-11-16 12:43:16,327 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 239 transitions, 1836 flow [2022-11-16 12:43:16,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-16 12:43:16,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-16 12:43:16,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1957 transitions. [2022-11-16 12:43:16,333 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5376373626373626 [2022-11-16 12:43:16,333 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1957 transitions. [2022-11-16 12:43:16,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1957 transitions. [2022-11-16 12:43:16,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:43:16,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1957 transitions. [2022-11-16 12:43:16,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 75.26923076923077) internal successors, (1957), 26 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:16,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 140.0) internal successors, (3780), 27 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:16,345 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 140.0) internal successors, (3780), 27 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:16,346 INFO L175 Difference]: Start difference. First operand has 208 places, 161 transitions, 951 flow. Second operand 26 states and 1957 transitions. [2022-11-16 12:43:16,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 239 transitions, 1836 flow [2022-11-16 12:43:16,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 239 transitions, 1807 flow, removed 3 selfloop flow, removed 12 redundant places. [2022-11-16 12:43:16,391 INFO L231 Difference]: Finished difference. Result has 230 places, 190 transitions, 1443 flow [2022-11-16 12:43:16,392 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=924, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1443, PETRI_PLACES=230, PETRI_TRANSITIONS=190} [2022-11-16 12:43:16,392 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 112 predicate places. [2022-11-16 12:43:16,393 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 190 transitions, 1443 flow [2022-11-16 12:43:16,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 72.76595744680851) internal successors, (3420), 47 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:16,394 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:43:16,394 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:43:16,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-16 12:43:16,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-16 12:43:16,596 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:43:16,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:43:16,596 INFO L85 PathProgramCache]: Analyzing trace with hash 613350483, now seen corresponding path program 1 times [2022-11-16 12:43:16,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:43:16,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961096145] [2022-11-16 12:43:16,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:43:16,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:43:16,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:43:17,711 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:43:17,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:43:17,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961096145] [2022-11-16 12:43:17,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961096145] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:43:17,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67639574] [2022-11-16 12:43:17,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:43:17,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:43:17,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:43:17,714 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:43:17,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 12:43:17,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:43:17,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-16 12:43:17,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:43:18,202 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 [2022-11-16 12:43:18,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:43:18,478 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 [2022-11-16 12:43:18,734 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:43:18,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:43:19,074 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_576 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_576) |c_ULTIMATE.start_main_#t~ret8#1.base|) (+ |c_ULTIMATE.start_main_#t~ret8#1.offset| 4)) 9223372039002259456))) is different from false [2022-11-16 12:43:19,294 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:43:19,294 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 26 treesize of output 27 [2022-11-16 12:43:19,305 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:43:19,306 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 [2022-11-16 12:43:19,742 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:43:19,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67639574] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:43:19,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:43:19,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 46 [2022-11-16 12:43:19,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160075375] [2022-11-16 12:43:19,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:43:19,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-16 12:43:19,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:43:19,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-16 12:43:19,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1882, Unknown=17, NotChecked=88, Total=2162 [2022-11-16 12:43:19,750 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 140 [2022-11-16 12:43:19,751 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 190 transitions, 1443 flow. Second operand has 47 states, 47 states have (on average 72.76595744680851) internal successors, (3420), 47 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:19,752 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:43:19,752 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 140 [2022-11-16 12:43:19,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:43:24,922 INFO L130 PetriNetUnfolder]: 1933/5602 cut-off events. [2022-11-16 12:43:24,922 INFO L131 PetriNetUnfolder]: For 16936/17631 co-relation queries the response was YES. [2022-11-16 12:43:24,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18560 conditions, 5602 events. 1933/5602 cut-off events. For 16936/17631 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 51740 event pairs, 902 based on Foata normal form. 578/5828 useless extension candidates. Maximal degree in co-relation 18516. Up to 2158 conditions per place. [2022-11-16 12:43:24,985 INFO L137 encePairwiseOnDemand]: 116/140 looper letters, 129 selfloop transitions, 57 changer transitions 0/244 dead transitions. [2022-11-16 12:43:24,986 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 244 transitions, 2056 flow [2022-11-16 12:43:24,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-16 12:43:24,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-16 12:43:24,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2096 transitions. [2022-11-16 12:43:24,990 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5346938775510204 [2022-11-16 12:43:24,990 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2096 transitions. [2022-11-16 12:43:24,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2096 transitions. [2022-11-16 12:43:24,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:43:24,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2096 transitions. [2022-11-16 12:43:24,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 74.85714285714286) internal successors, (2096), 28 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:25,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 140.0) internal successors, (4060), 29 states have internal predecessors, (4060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:25,003 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 140.0) internal successors, (4060), 29 states have internal predecessors, (4060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:25,003 INFO L175 Difference]: Start difference. First operand has 230 places, 190 transitions, 1443 flow. Second operand 28 states and 2096 transitions. [2022-11-16 12:43:25,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 244 transitions, 2056 flow [2022-11-16 12:43:25,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 244 transitions, 1988 flow, removed 6 selfloop flow, removed 14 redundant places. [2022-11-16 12:43:25,061 INFO L231 Difference]: Finished difference. Result has 244 places, 190 transitions, 1480 flow [2022-11-16 12:43:25,061 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=1347, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1480, PETRI_PLACES=244, PETRI_TRANSITIONS=190} [2022-11-16 12:43:25,062 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 126 predicate places. [2022-11-16 12:43:25,062 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 190 transitions, 1480 flow [2022-11-16 12:43:25,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 72.76595744680851) internal successors, (3420), 47 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:25,063 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:43:25,064 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:43:25,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-16 12:43:25,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-16 12:43:25,270 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:43:25,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:43:25,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1019318746, now seen corresponding path program 1 times [2022-11-16 12:43:25,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:43:25,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091954812] [2022-11-16 12:43:25,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:43:25,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:43:25,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:43:25,383 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 12:43:25,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:43:25,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091954812] [2022-11-16 12:43:25,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091954812] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:43:25,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616796401] [2022-11-16 12:43:25,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:43:25,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:43:25,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:43:25,386 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:43:25,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-16 12:43:25,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:43:25,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:43:25,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:43:25,625 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 12:43:25,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:43:25,682 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 12:43:25,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616796401] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:43:25,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:43:25,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-16 12:43:25,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686955161] [2022-11-16 12:43:25,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:43:25,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:43:25,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:43:25,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:43:25,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:43:25,686 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 140 [2022-11-16 12:43:25,687 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 190 transitions, 1480 flow. Second operand has 12 states, 12 states have (on average 107.66666666666667) internal successors, (1292), 12 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:25,687 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:43:25,687 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 140 [2022-11-16 12:43:25,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:43:27,635 INFO L130 PetriNetUnfolder]: 1555/5124 cut-off events. [2022-11-16 12:43:27,635 INFO L131 PetriNetUnfolder]: For 20168/21374 co-relation queries the response was YES. [2022-11-16 12:43:27,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19275 conditions, 5124 events. 1555/5124 cut-off events. For 20168/21374 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 51029 event pairs, 192 based on Foata normal form. 1151/5995 useless extension candidates. Maximal degree in co-relation 19230. Up to 1072 conditions per place. [2022-11-16 12:43:27,670 INFO L137 encePairwiseOnDemand]: 133/140 looper letters, 226 selfloop transitions, 34 changer transitions 0/393 dead transitions. [2022-11-16 12:43:27,670 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 393 transitions, 3602 flow [2022-11-16 12:43:27,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 12:43:27,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-16 12:43:27,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2020 transitions. [2022-11-16 12:43:27,675 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8015873015873016 [2022-11-16 12:43:27,675 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2020 transitions. [2022-11-16 12:43:27,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2020 transitions. [2022-11-16 12:43:27,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:43:27,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2020 transitions. [2022-11-16 12:43:27,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 112.22222222222223) internal successors, (2020), 18 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) [2022-11-16 12:43:27,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 140.0) internal successors, (2660), 19 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:27,684 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 140.0) internal successors, (2660), 19 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:27,684 INFO L175 Difference]: Start difference. First operand has 244 places, 190 transitions, 1480 flow. Second operand 18 states and 2020 transitions. [2022-11-16 12:43:27,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 393 transitions, 3602 flow [2022-11-16 12:43:27,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 393 transitions, 3488 flow, removed 2 selfloop flow, removed 23 redundant places. [2022-11-16 12:43:27,741 INFO L231 Difference]: Finished difference. Result has 242 places, 210 transitions, 1732 flow [2022-11-16 12:43:27,741 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=1390, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1732, PETRI_PLACES=242, PETRI_TRANSITIONS=210} [2022-11-16 12:43:27,742 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 124 predicate places. [2022-11-16 12:43:27,742 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 210 transitions, 1732 flow [2022-11-16 12:43:27,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 107.66666666666667) internal successors, (1292), 12 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:27,743 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:43:27,743 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:43:27,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-16 12:43:27,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-16 12:43:27,949 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:43:27,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:43:27,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1534110662, now seen corresponding path program 1 times [2022-11-16 12:43:27,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:43:27,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672566823] [2022-11-16 12:43:27,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:43:27,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:43:27,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:43:28,059 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 12:43:28,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:43:28,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672566823] [2022-11-16 12:43:28,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672566823] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:43:28,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699654906] [2022-11-16 12:43:28,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:43:28,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:43:28,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:43:28,062 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:43:28,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-16 12:43:28,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:43:28,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:43:28,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:43:28,304 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 12:43:28,304 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:43:28,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699654906] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:43:28,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:43:28,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-16 12:43:28,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073937843] [2022-11-16 12:43:28,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:43:28,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:43:28,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:43:28,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:43:28,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:43:28,307 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 140 [2022-11-16 12:43:28,308 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 210 transitions, 1732 flow. Second operand has 6 states, 6 states have (on average 107.33333333333333) internal successors, (644), 6 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:28,308 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:43:28,309 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 140 [2022-11-16 12:43:28,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:43:29,857 INFO L130 PetriNetUnfolder]: 1344/4606 cut-off events. [2022-11-16 12:43:29,857 INFO L131 PetriNetUnfolder]: For 20769/21778 co-relation queries the response was YES. [2022-11-16 12:43:29,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18240 conditions, 4606 events. 1344/4606 cut-off events. For 20769/21778 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 45932 event pairs, 25 based on Foata normal form. 1095/5488 useless extension candidates. Maximal degree in co-relation 18194. Up to 1276 conditions per place. [2022-11-16 12:43:29,910 INFO L137 encePairwiseOnDemand]: 135/140 looper letters, 105 selfloop transitions, 18 changer transitions 0/256 dead transitions. [2022-11-16 12:43:29,911 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 256 transitions, 2283 flow [2022-11-16 12:43:29,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:43:29,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 12:43:29,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 783 transitions. [2022-11-16 12:43:29,913 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7989795918367347 [2022-11-16 12:43:29,913 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 783 transitions. [2022-11-16 12:43:29,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 783 transitions. [2022-11-16 12:43:29,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:43:29,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 783 transitions. [2022-11-16 12:43:29,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 111.85714285714286) internal successors, (783), 7 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:29,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 140.0) internal successors, (1120), 8 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:29,916 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 140.0) internal successors, (1120), 8 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:29,916 INFO L175 Difference]: Start difference. First operand has 242 places, 210 transitions, 1732 flow. Second operand 7 states and 783 transitions. [2022-11-16 12:43:29,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 256 transitions, 2283 flow [2022-11-16 12:43:29,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 256 transitions, 2209 flow, removed 23 selfloop flow, removed 5 redundant places. [2022-11-16 12:43:29,967 INFO L231 Difference]: Finished difference. Result has 238 places, 206 transitions, 1667 flow [2022-11-16 12:43:29,968 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=1631, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1667, PETRI_PLACES=238, PETRI_TRANSITIONS=206} [2022-11-16 12:43:29,968 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 120 predicate places. [2022-11-16 12:43:29,968 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 206 transitions, 1667 flow [2022-11-16 12:43:29,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 107.33333333333333) internal successors, (644), 6 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:29,969 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:43:29,969 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:43:29,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-16 12:43:30,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-16 12:43:30,175 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:43:30,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:43:30,176 INFO L85 PathProgramCache]: Analyzing trace with hash 367400846, now seen corresponding path program 2 times [2022-11-16 12:43:30,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:43:30,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502487120] [2022-11-16 12:43:30,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:43:30,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:43:30,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:43:30,363 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:43:30,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:43:30,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502487120] [2022-11-16 12:43:30,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502487120] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:43:30,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877121584] [2022-11-16 12:43:30,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:43:30,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:43:30,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:43:30,367 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:43:30,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-16 12:43:30,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:43:30,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:43:30,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 12:43:30,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:43:30,790 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-16 12:43:30,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:43:30,994 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-16 12:43:30,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877121584] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:43:30,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:43:30,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 17 [2022-11-16 12:43:30,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842388394] [2022-11-16 12:43:30,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:43:30,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 12:43:30,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:43:30,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 12:43:30,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:43:30,997 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 140 [2022-11-16 12:43:30,998 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 206 transitions, 1667 flow. Second operand has 18 states, 18 states have (on average 92.61111111111111) internal successors, (1667), 18 states have internal predecessors, (1667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:30,999 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:43:30,999 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 140 [2022-11-16 12:43:30,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:43:33,699 INFO L130 PetriNetUnfolder]: 1777/8432 cut-off events. [2022-11-16 12:43:33,699 INFO L131 PetriNetUnfolder]: For 32248/32273 co-relation queries the response was YES. [2022-11-16 12:43:33,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28634 conditions, 8432 events. 1777/8432 cut-off events. For 32248/32273 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 91088 event pairs, 1317 based on Foata normal form. 3/8221 useless extension candidates. Maximal degree in co-relation 28589. Up to 858 conditions per place. [2022-11-16 12:43:33,779 INFO L137 encePairwiseOnDemand]: 129/140 looper letters, 160 selfloop transitions, 25 changer transitions 0/317 dead transitions. [2022-11-16 12:43:33,780 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 317 transitions, 2988 flow [2022-11-16 12:43:33,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 12:43:33,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-16 12:43:33,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2263 transitions. [2022-11-16 12:43:33,784 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6735119047619048 [2022-11-16 12:43:33,784 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2263 transitions. [2022-11-16 12:43:33,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2263 transitions. [2022-11-16 12:43:33,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:43:33,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2263 transitions. [2022-11-16 12:43:33,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 94.29166666666667) internal successors, (2263), 24 states have internal predecessors, (2263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:33,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 140.0) internal successors, (3500), 25 states have internal predecessors, (3500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:33,794 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 140.0) internal successors, (3500), 25 states have internal predecessors, (3500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:33,795 INFO L175 Difference]: Start difference. First operand has 238 places, 206 transitions, 1667 flow. Second operand 24 states and 2263 transitions. [2022-11-16 12:43:33,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 317 transitions, 2988 flow [2022-11-16 12:43:33,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 317 transitions, 2953 flow, removed 0 selfloop flow, removed 9 redundant places. [2022-11-16 12:43:33,901 INFO L231 Difference]: Finished difference. Result has 252 places, 210 transitions, 1709 flow [2022-11-16 12:43:33,902 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=1622, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1709, PETRI_PLACES=252, PETRI_TRANSITIONS=210} [2022-11-16 12:43:33,902 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 134 predicate places. [2022-11-16 12:43:33,903 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 210 transitions, 1709 flow [2022-11-16 12:43:33,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 92.61111111111111) internal successors, (1667), 18 states have internal predecessors, (1667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:33,903 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:43:33,904 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:43:33,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-16 12:43:34,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-16 12:43:34,108 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:43:34,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:43:34,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1331642620, now seen corresponding path program 1 times [2022-11-16 12:43:34,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:43:34,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537865110] [2022-11-16 12:43:34,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:43:34,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:43:34,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:43:35,274 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:43:35,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:43:35,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537865110] [2022-11-16 12:43:35,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537865110] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:43:35,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794956673] [2022-11-16 12:43:35,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:43:35,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:43:35,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:43:35,279 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:43:35,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-16 12:43:35,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:43:35,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-16 12:43:35,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:43:35,958 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 [2022-11-16 12:43:36,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:43:36,259 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 [2022-11-16 12:43:36,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:43:36,493 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 [2022-11-16 12:43:36,607 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:43:36,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:43:37,145 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_688 (Array Int Int)) (v_ArrVal_687 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_687) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_688) |c_ULTIMATE.start_main_#t~ret8#1.base|) (+ |c_ULTIMATE.start_main_#t~ret8#1.offset| 4)) 9223372039002259456))) is different from false [2022-11-16 12:43:37,424 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:43:37,424 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 29 treesize of output 30 [2022-11-16 12:43:37,434 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:43:37,434 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 80 treesize of output 76 [2022-11-16 12:43:37,439 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 62 treesize of output 54 [2022-11-16 12:43:37,445 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 28 treesize of output 24 [2022-11-16 12:43:38,131 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:43:38,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794956673] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:43:38,132 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:43:38,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 52 [2022-11-16 12:43:38,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622502698] [2022-11-16 12:43:38,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:43:38,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-16 12:43:38,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:43:38,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-16 12:43:38,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=2418, Unknown=46, NotChecked=100, Total=2756 [2022-11-16 12:43:38,136 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 140 [2022-11-16 12:43:38,139 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 210 transitions, 1709 flow. Second operand has 53 states, 53 states have (on average 67.62264150943396) internal successors, (3584), 53 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:38,139 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:43:38,139 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 140 [2022-11-16 12:43:38,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:43:48,530 INFO L130 PetriNetUnfolder]: 7563/20767 cut-off events. [2022-11-16 12:43:48,531 INFO L131 PetriNetUnfolder]: For 71107/74821 co-relation queries the response was YES. [2022-11-16 12:43:48,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72091 conditions, 20767 events. 7563/20767 cut-off events. For 71107/74821 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 227233 event pairs, 2959 based on Foata normal form. 3506/23720 useless extension candidates. Maximal degree in co-relation 72049. Up to 7172 conditions per place. [2022-11-16 12:43:48,718 INFO L137 encePairwiseOnDemand]: 115/140 looper letters, 208 selfloop transitions, 71 changer transitions 0/334 dead transitions. [2022-11-16 12:43:48,718 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 334 transitions, 3092 flow [2022-11-16 12:43:48,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-16 12:43:48,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-11-16 12:43:48,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2065 transitions. [2022-11-16 12:43:48,722 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5086206896551724 [2022-11-16 12:43:48,722 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2065 transitions. [2022-11-16 12:43:48,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2065 transitions. [2022-11-16 12:43:48,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:43:48,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2065 transitions. [2022-11-16 12:43:48,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 71.20689655172414) internal successors, (2065), 29 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:48,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 140.0) internal successors, (4200), 30 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:48,732 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 140.0) internal successors, (4200), 30 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:48,733 INFO L175 Difference]: Start difference. First operand has 252 places, 210 transitions, 1709 flow. Second operand 29 states and 2065 transitions. [2022-11-16 12:43:48,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 334 transitions, 3092 flow [2022-11-16 12:43:48,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 334 transitions, 3038 flow, removed 2 selfloop flow, removed 17 redundant places. [2022-11-16 12:43:48,926 INFO L231 Difference]: Finished difference. Result has 269 places, 229 transitions, 2155 flow [2022-11-16 12:43:48,927 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=1656, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2155, PETRI_PLACES=269, PETRI_TRANSITIONS=229} [2022-11-16 12:43:48,927 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 151 predicate places. [2022-11-16 12:43:48,927 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 229 transitions, 2155 flow [2022-11-16 12:43:48,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 67.62264150943396) internal successors, (3584), 53 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:48,928 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:43:48,928 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:43:48,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-16 12:43:49,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:43:49,129 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:43:49,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:43:49,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1762347183, now seen corresponding path program 1 times [2022-11-16 12:43:49,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:43:49,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904287493] [2022-11-16 12:43:49,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:43:49,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:43:49,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:43:50,355 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:43:50,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:43:50,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904287493] [2022-11-16 12:43:50,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904287493] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:43:50,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057838168] [2022-11-16 12:43:50,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:43:50,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:43:50,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:43:50,357 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:43:50,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-16 12:43:50,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:43:50,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-16 12:43:50,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:43:50,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 [2022-11-16 12:43:50,657 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 12:43:50,657 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 [2022-11-16 12:43:51,019 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 13 treesize of output 9 [2022-11-16 12:43:51,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:43:51,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:43:51,482 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 14 treesize of output 16 [2022-11-16 12:43:51,552 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:43:51,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:43:51,659 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_721 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_721) c_~A~0.base) (+ (* 4 |c_thread1Thread1of1ForFork1_#t~post1#1|) c_~A~0.offset 4)) 4294967295)) is different from false [2022-11-16 12:43:51,689 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_721 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_721) c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset 4)) 4294967295)) is different from false [2022-11-16 12:43:51,910 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_721 (Array Int Int)) (v_ArrVal_720 (Array Int Int))) (<= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_720) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_721) |c_ULTIMATE.start_main_#t~ret8#1.base|) (+ |c_ULTIMATE.start_main_#t~ret8#1.offset| 4)) 4294967295)) is different from false [2022-11-16 12:43:51,921 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_721 (Array Int Int)) (v_ArrVal_720 (Array Int Int))) (<= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_720) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_721) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) (+ |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset| 4)) 4294967295)) is different from false [2022-11-16 12:43:51,930 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_721 (Array Int Int)) (v_ArrVal_720 (Array Int Int))) (<= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_720) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_721) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967295)) is different from false [2022-11-16 12:43:51,970 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:43:51,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2022-11-16 12:43:51,983 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:43:51,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 68 [2022-11-16 12:43:51,989 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 54 treesize of output 46 [2022-11-16 12:43:51,997 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 24 treesize of output 20 [2022-11-16 12:43:52,696 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 10 treesize of output 8 [2022-11-16 12:43:52,744 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 10 not checked. [2022-11-16 12:43:52,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057838168] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:43:52,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:43:52,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 47 [2022-11-16 12:43:52,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988942475] [2022-11-16 12:43:52,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:43:52,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-16 12:43:52,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:43:52,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-16 12:43:52,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1627, Unknown=23, NotChecked=430, Total=2256 [2022-11-16 12:43:52,751 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 140 [2022-11-16 12:43:52,754 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 229 transitions, 2155 flow. Second operand has 48 states, 48 states have (on average 67.66666666666667) internal successors, (3248), 48 states have internal predecessors, (3248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:52,754 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:43:52,754 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 140 [2022-11-16 12:43:52,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:44:03,090 INFO L130 PetriNetUnfolder]: 8383/22562 cut-off events. [2022-11-16 12:44:03,090 INFO L131 PetriNetUnfolder]: For 93303/97545 co-relation queries the response was YES. [2022-11-16 12:44:03,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81315 conditions, 22562 events. 8383/22562 cut-off events. For 93303/97545 co-relation queries the response was YES. Maximal size of possible extension queue 655. Compared 248822 event pairs, 3344 based on Foata normal form. 4028/25854 useless extension candidates. Maximal degree in co-relation 81267. Up to 8101 conditions per place. [2022-11-16 12:44:03,294 INFO L137 encePairwiseOnDemand]: 116/140 looper letters, 208 selfloop transitions, 91 changer transitions 0/354 dead transitions. [2022-11-16 12:44:03,294 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 354 transitions, 3575 flow [2022-11-16 12:44:03,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-16 12:44:03,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-11-16 12:44:03,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2601 transitions. [2022-11-16 12:44:03,297 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5021235521235521 [2022-11-16 12:44:03,297 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2601 transitions. [2022-11-16 12:44:03,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2601 transitions. [2022-11-16 12:44:03,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:44:03,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2601 transitions. [2022-11-16 12:44:03,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 70.29729729729729) internal successors, (2601), 37 states have internal predecessors, (2601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:03,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 140.0) internal successors, (5320), 38 states have internal predecessors, (5320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:03,305 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 140.0) internal successors, (5320), 38 states have internal predecessors, (5320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:03,306 INFO L175 Difference]: Start difference. First operand has 269 places, 229 transitions, 2155 flow. Second operand 37 states and 2601 transitions. [2022-11-16 12:44:03,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 354 transitions, 3575 flow [2022-11-16 12:44:03,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 354 transitions, 3468 flow, removed 4 selfloop flow, removed 19 redundant places. [2022-11-16 12:44:03,566 INFO L231 Difference]: Finished difference. Result has 292 places, 244 transitions, 2548 flow [2022-11-16 12:44:03,566 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=2061, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=2548, PETRI_PLACES=292, PETRI_TRANSITIONS=244} [2022-11-16 12:44:03,567 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 174 predicate places. [2022-11-16 12:44:03,567 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 244 transitions, 2548 flow [2022-11-16 12:44:03,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 67.66666666666667) internal successors, (3248), 48 states have internal predecessors, (3248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:03,567 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:44:03,567 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:44:03,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-16 12:44:03,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:44:03,770 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:44:03,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:44:03,771 INFO L85 PathProgramCache]: Analyzing trace with hash -899463347, now seen corresponding path program 2 times [2022-11-16 12:44:03,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:44:03,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440766904] [2022-11-16 12:44:03,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:44:03,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:44:03,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:05,160 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:05,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:44:05,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440766904] [2022-11-16 12:44:05,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440766904] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:44:05,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862521412] [2022-11-16 12:44:05,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:44:05,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:44:05,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:44:05,163 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:44:05,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-16 12:44:05,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:44:05,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:44:05,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-16 12:44:05,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:44:05,843 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 [2022-11-16 12:44:06,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:44:06,186 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 16 treesize of output 18 [2022-11-16 12:44:06,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:44:06,375 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 16 treesize of output 18 [2022-11-16 12:44:06,566 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:06,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:44:06,932 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_753 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_753) c_~A~0.base) (+ c_~A~0.offset 4)) 4294967295)) is different from false [2022-11-16 12:44:07,521 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_753 (Array Int Int)) (v_ArrVal_752 (Array Int Int))) (<= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_752) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_753) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) (+ |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset| 4)) 4294967295)) is different from false [2022-11-16 12:44:07,530 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_753 (Array Int Int)) (v_ArrVal_752 (Array Int Int))) (<= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_752) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_753) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967295)) is different from false [2022-11-16 12:44:07,573 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:44:07,573 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 27 treesize of output 28 [2022-11-16 12:44:07,585 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:44:07,585 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 142 treesize of output 132 [2022-11-16 12:44:07,598 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 118 treesize of output 102 [2022-11-16 12:44:07,608 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 55 treesize of output 47 [2022-11-16 12:44:08,573 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2022-11-16 12:44:08,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862521412] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:44:08,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:44:08,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 52 [2022-11-16 12:44:08,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067622386] [2022-11-16 12:44:08,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:44:08,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-16 12:44:08,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:44:08,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-16 12:44:08,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=2250, Unknown=32, NotChecked=294, Total=2756 [2022-11-16 12:44:08,577 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 140 [2022-11-16 12:44:08,580 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 244 transitions, 2548 flow. Second operand has 53 states, 53 states have (on average 67.62264150943396) internal successors, (3584), 53 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:08,580 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:44:08,580 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 140 [2022-11-16 12:44:08,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:44:20,485 INFO L130 PetriNetUnfolder]: 8331/22665 cut-off events. [2022-11-16 12:44:20,485 INFO L131 PetriNetUnfolder]: For 100712/104912 co-relation queries the response was YES. [2022-11-16 12:44:20,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82038 conditions, 22665 events. 8331/22665 cut-off events. For 100712/104912 co-relation queries the response was YES. Maximal size of possible extension queue 654. Compared 251491 event pairs, 3262 based on Foata normal form. 3946/25886 useless extension candidates. Maximal degree in co-relation 81984. Up to 7172 conditions per place. [2022-11-16 12:44:20,780 INFO L137 encePairwiseOnDemand]: 116/140 looper letters, 201 selfloop transitions, 79 changer transitions 0/335 dead transitions. [2022-11-16 12:44:20,780 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 335 transitions, 3572 flow [2022-11-16 12:44:20,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-16 12:44:20,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-16 12:44:20,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1857 transitions. [2022-11-16 12:44:20,784 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5101648351648351 [2022-11-16 12:44:20,784 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1857 transitions. [2022-11-16 12:44:20,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1857 transitions. [2022-11-16 12:44:20,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:44:20,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1857 transitions. [2022-11-16 12:44:20,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 71.42307692307692) internal successors, (1857), 26 states have internal predecessors, (1857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:20,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 140.0) internal successors, (3780), 27 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:20,792 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 140.0) internal successors, (3780), 27 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:20,793 INFO L175 Difference]: Start difference. First operand has 292 places, 244 transitions, 2548 flow. Second operand 26 states and 1857 transitions. [2022-11-16 12:44:20,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 335 transitions, 3572 flow [2022-11-16 12:44:21,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 335 transitions, 3389 flow, removed 5 selfloop flow, removed 26 redundant places. [2022-11-16 12:44:21,143 INFO L231 Difference]: Finished difference. Result has 291 places, 244 transitions, 2528 flow [2022-11-16 12:44:21,144 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=2356, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2528, PETRI_PLACES=291, PETRI_TRANSITIONS=244} [2022-11-16 12:44:21,144 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 173 predicate places. [2022-11-16 12:44:21,144 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 244 transitions, 2528 flow [2022-11-16 12:44:21,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 67.62264150943396) internal successors, (3584), 53 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:21,146 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:44:21,146 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:44:21,153 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-11-16 12:44:21,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:44:21,354 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:44:21,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:44:21,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1311027655, now seen corresponding path program 2 times [2022-11-16 12:44:21,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:44:21,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113913476] [2022-11-16 12:44:21,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:44:21,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:44:21,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:22,728 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:22,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:44:22,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113913476] [2022-11-16 12:44:22,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113913476] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:44:22,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130605818] [2022-11-16 12:44:22,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:44:22,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:44:22,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:44:22,730 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:44:22,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-16 12:44:22,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:44:22,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:44:22,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-16 12:44:22,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:44:23,373 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 [2022-11-16 12:44:23,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:44:23,707 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 [2022-11-16 12:44:23,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:44:23,800 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 [2022-11-16 12:44:24,045 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:24,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:44:24,883 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:44:24,883 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 29 treesize of output 30 [2022-11-16 12:44:24,897 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:44:24,897 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 158 treesize of output 148 [2022-11-16 12:44:24,907 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 67 treesize of output 59 [2022-11-16 12:44:24,914 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 126 treesize of output 110 [2022-11-16 12:44:25,770 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:25,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130605818] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:44:25,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:44:25,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 51 [2022-11-16 12:44:25,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498410750] [2022-11-16 12:44:25,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:44:25,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-16 12:44:25,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:44:25,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-16 12:44:25,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=2406, Unknown=42, NotChecked=0, Total=2652 [2022-11-16 12:44:25,779 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 140 [2022-11-16 12:44:25,784 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 244 transitions, 2528 flow. Second operand has 52 states, 52 states have (on average 70.61538461538461) internal successors, (3672), 52 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:25,784 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:44:25,784 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 140 [2022-11-16 12:44:25,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:44:37,194 INFO L130 PetriNetUnfolder]: 9026/20873 cut-off events. [2022-11-16 12:44:37,194 INFO L131 PetriNetUnfolder]: For 181194/182577 co-relation queries the response was YES. [2022-11-16 12:44:37,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85089 conditions, 20873 events. 9026/20873 cut-off events. For 181194/182577 co-relation queries the response was YES. Maximal size of possible extension queue 932. Compared 236882 event pairs, 3056 based on Foata normal form. 759/20744 useless extension candidates. Maximal degree in co-relation 85037. Up to 6212 conditions per place. [2022-11-16 12:44:37,526 INFO L137 encePairwiseOnDemand]: 116/140 looper letters, 216 selfloop transitions, 35 changer transitions 0/355 dead transitions. [2022-11-16 12:44:37,526 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 355 transitions, 4292 flow [2022-11-16 12:44:37,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-16 12:44:37,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-16 12:44:37,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1996 transitions. [2022-11-16 12:44:37,529 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5280423280423281 [2022-11-16 12:44:37,529 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1996 transitions. [2022-11-16 12:44:37,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1996 transitions. [2022-11-16 12:44:37,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:44:37,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1996 transitions. [2022-11-16 12:44:37,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 73.92592592592592) internal successors, (1996), 27 states have internal predecessors, (1996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:37,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 140.0) internal successors, (3920), 28 states have internal predecessors, (3920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:37,543 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 140.0) internal successors, (3920), 28 states have internal predecessors, (3920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:37,544 INFO L175 Difference]: Start difference. First operand has 291 places, 244 transitions, 2528 flow. Second operand 27 states and 1996 transitions. [2022-11-16 12:44:37,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 355 transitions, 4292 flow [2022-11-16 12:44:37,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 355 transitions, 4145 flow, removed 14 selfloop flow, removed 22 redundant places. [2022-11-16 12:44:37,835 INFO L231 Difference]: Finished difference. Result has 299 places, 249 transitions, 2569 flow [2022-11-16 12:44:37,835 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=2441, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2569, PETRI_PLACES=299, PETRI_TRANSITIONS=249} [2022-11-16 12:44:37,836 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 181 predicate places. [2022-11-16 12:44:37,836 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 249 transitions, 2569 flow [2022-11-16 12:44:37,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 70.61538461538461) internal successors, (3672), 52 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:37,836 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:44:37,837 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:44:37,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-16 12:44:38,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:44:38,037 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:44:38,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:44:38,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1311027652, now seen corresponding path program 1 times [2022-11-16 12:44:38,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:44:38,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083434080] [2022-11-16 12:44:38,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:44:38,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:44:38,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:39,204 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:39,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:44:39,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083434080] [2022-11-16 12:44:39,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083434080] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:44:39,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332840209] [2022-11-16 12:44:39,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:44:39,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:44:39,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:44:39,206 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:44:39,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-16 12:44:39,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:39,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-16 12:44:39,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:44:39,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 [2022-11-16 12:44:39,546 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 12:44:39,547 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 [2022-11-16 12:44:39,870 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 13 treesize of output 9 [2022-11-16 12:44:40,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:44:40,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:44:40,284 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 16 treesize of output 18 [2022-11-16 12:44:40,557 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:40,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:44:40,810 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_818 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_818) c_~A~0.base) (+ c_~A~0.offset 4)) 9223372039002259456)) is different from false [2022-11-16 12:44:40,983 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_818 (Array Int Int)) (v_ArrVal_817 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_817) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_818) |c_ULTIMATE.start_main_#t~ret8#1.base|) (+ |c_ULTIMATE.start_main_#t~ret8#1.offset| 4)) 9223372039002259456)) is different from false [2022-11-16 12:44:41,394 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:44:41,395 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 27 treesize of output 28 [2022-11-16 12:44:41,416 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:44:41,416 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 142 treesize of output 132 [2022-11-16 12:44:41,423 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 118 treesize of output 102 [2022-11-16 12:44:41,429 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 102 treesize of output 94 [2022-11-16 12:44:42,408 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 10 treesize of output 8 [2022-11-16 12:44:42,461 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:42,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332840209] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:44:42,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:44:42,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 51 [2022-11-16 12:44:42,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525154450] [2022-11-16 12:44:42,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:44:42,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-16 12:44:42,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:44:42,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-16 12:44:42,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=2231, Unknown=32, NotChecked=194, Total=2652 [2022-11-16 12:44:42,467 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 140 [2022-11-16 12:44:42,469 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 249 transitions, 2569 flow. Second operand has 52 states, 52 states have (on average 67.67307692307692) internal successors, (3519), 52 states have internal predecessors, (3519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:42,469 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:44:42,469 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 140 [2022-11-16 12:44:42,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:44:55,502 INFO L130 PetriNetUnfolder]: 9608/21916 cut-off events. [2022-11-16 12:44:55,502 INFO L131 PetriNetUnfolder]: For 197646/199154 co-relation queries the response was YES. [2022-11-16 12:44:55,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92427 conditions, 21916 events. 9608/21916 cut-off events. For 197646/199154 co-relation queries the response was YES. Maximal size of possible extension queue 1099. Compared 251247 event pairs, 2908 based on Foata normal form. 844/22182 useless extension candidates. Maximal degree in co-relation 92371. Up to 6384 conditions per place. [2022-11-16 12:44:55,806 INFO L137 encePairwiseOnDemand]: 116/140 looper letters, 244 selfloop transitions, 39 changer transitions 0/384 dead transitions. [2022-11-16 12:44:55,807 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 384 transitions, 4684 flow [2022-11-16 12:44:55,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-16 12:44:55,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-11-16 12:44:55,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2066 transitions. [2022-11-16 12:44:55,811 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5088669950738917 [2022-11-16 12:44:55,811 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2066 transitions. [2022-11-16 12:44:55,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2066 transitions. [2022-11-16 12:44:55,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:44:55,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2066 transitions. [2022-11-16 12:44:55,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 71.24137931034483) internal successors, (2066), 29 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:55,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 140.0) internal successors, (4200), 30 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:55,822 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 140.0) internal successors, (4200), 30 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:55,822 INFO L175 Difference]: Start difference. First operand has 299 places, 249 transitions, 2569 flow. Second operand 29 states and 2066 transitions. [2022-11-16 12:44:55,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 384 transitions, 4684 flow [2022-11-16 12:44:56,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 384 transitions, 4618 flow, removed 3 selfloop flow, removed 21 redundant places. [2022-11-16 12:44:56,235 INFO L231 Difference]: Finished difference. Result has 307 places, 252 transitions, 2610 flow [2022-11-16 12:44:56,236 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=2496, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2610, PETRI_PLACES=307, PETRI_TRANSITIONS=252} [2022-11-16 12:44:56,237 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 189 predicate places. [2022-11-16 12:44:56,237 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 252 transitions, 2610 flow [2022-11-16 12:44:56,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 67.67307692307692) internal successors, (3519), 52 states have internal predecessors, (3519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:56,238 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:44:56,238 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:44:56,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-16 12:44:56,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-16 12:44:56,445 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:44:56,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:44:56,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1725469971, now seen corresponding path program 3 times [2022-11-16 12:44:56,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:44:56,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198059475] [2022-11-16 12:44:56,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:44:56,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:44:56,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:56,841 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:56,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:44:56,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198059475] [2022-11-16 12:44:56,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198059475] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:44:56,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767615928] [2022-11-16 12:44:56,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:44:56,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:44:56,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:44:56,844 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:44:56,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-16 12:44:57,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 12:44:57,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:44:57,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 12:44:57,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:44:57,682 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:57,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:44:58,192 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:58,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767615928] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:44:58,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:44:58,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 34 [2022-11-16 12:44:58,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466213446] [2022-11-16 12:44:58,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:44:58,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 12:44:58,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:44:58,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 12:44:58,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=915, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 12:44:58,200 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 140 [2022-11-16 12:44:58,202 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 252 transitions, 2610 flow. Second operand has 34 states, 34 states have (on average 87.02941176470588) internal successors, (2959), 34 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:58,203 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:44:58,203 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 140 [2022-11-16 12:44:58,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:45:03,613 INFO L130 PetriNetUnfolder]: 4226/12490 cut-off events. [2022-11-16 12:45:03,613 INFO L131 PetriNetUnfolder]: For 65992/66141 co-relation queries the response was YES. [2022-11-16 12:45:03,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48564 conditions, 12490 events. 4226/12490 cut-off events. For 65992/66141 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 125179 event pairs, 2326 based on Foata normal form. 60/12215 useless extension candidates. Maximal degree in co-relation 48508. Up to 6172 conditions per place. [2022-11-16 12:45:03,732 INFO L137 encePairwiseOnDemand]: 124/140 looper letters, 199 selfloop transitions, 39 changer transitions 11/347 dead transitions. [2022-11-16 12:45:03,732 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 347 transitions, 3484 flow [2022-11-16 12:45:03,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 12:45:03,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-16 12:45:03,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2163 transitions. [2022-11-16 12:45:03,736 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.64375 [2022-11-16 12:45:03,736 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2163 transitions. [2022-11-16 12:45:03,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2163 transitions. [2022-11-16 12:45:03,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:45:03,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2163 transitions. [2022-11-16 12:45:03,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 90.125) internal successors, (2163), 24 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:03,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 140.0) internal successors, (3500), 25 states have internal predecessors, (3500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:03,745 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 140.0) internal successors, (3500), 25 states have internal predecessors, (3500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:03,745 INFO L175 Difference]: Start difference. First operand has 307 places, 252 transitions, 2610 flow. Second operand 24 states and 2163 transitions. [2022-11-16 12:45:03,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 347 transitions, 3484 flow [2022-11-16 12:45:04,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 347 transitions, 3293 flow, removed 30 selfloop flow, removed 30 redundant places. [2022-11-16 12:45:04,059 INFO L231 Difference]: Finished difference. Result has 296 places, 228 transitions, 2045 flow [2022-11-16 12:45:04,060 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=1889, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2045, PETRI_PLACES=296, PETRI_TRANSITIONS=228} [2022-11-16 12:45:04,060 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 178 predicate places. [2022-11-16 12:45:04,060 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 228 transitions, 2045 flow [2022-11-16 12:45:04,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 87.02941176470588) internal successors, (2959), 34 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:04,061 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:45:04,061 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:45:04,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-16 12:45:04,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-16 12:45:04,262 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:45:04,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:45:04,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1202499115, now seen corresponding path program 3 times [2022-11-16 12:45:04,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:45:04,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193819829] [2022-11-16 12:45:04,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:45:04,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:45:04,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:05,503 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:05,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:45:05,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193819829] [2022-11-16 12:45:05,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193819829] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:45:05,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181098251] [2022-11-16 12:45:05,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:45:05,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:45:05,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:45:05,505 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:45:05,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-16 12:45:05,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 12:45:05,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:45:05,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-16 12:45:05,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:45:06,049 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 [2022-11-16 12:45:06,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:06,336 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 25 treesize of output 24 [2022-11-16 12:45:06,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:06,580 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 25 treesize of output 24 [2022-11-16 12:45:06,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:06,956 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 16 treesize of output 18 [2022-11-16 12:45:07,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:07,046 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 16 treesize of output 18 [2022-11-16 12:45:07,104 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:07,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:45:07,410 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_881 (Array Int Int)) (v_ArrVal_882 (Array Int Int))) (<= 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_881) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_882) |c_ULTIMATE.start_main_#t~ret8#1.base|) |c_ULTIMATE.start_main_#t~ret8#1.offset|) 4294967295))) is different from false [2022-11-16 12:45:09,959 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_881 (Array Int Int)) (v_ArrVal_879 Int) (v_ArrVal_882 (Array Int Int)) (|v_ULTIMATE.start_create_fresh_int_array_~i~2#1_97| Int)) (or (< |v_ULTIMATE.start_create_fresh_int_array_~i~2#1_97| (+ |c_ULTIMATE.start_create_fresh_int_array_~i~2#1| 1)) (<= 0 (+ (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* |v_ULTIMATE.start_create_fresh_int_array_~i~2#1_97| 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) v_ArrVal_879)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_881) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_882) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 4294967295)))) is different from false [2022-11-16 12:45:24,385 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_create_fresh_int_array_~i~2#1_98| Int) (v_ArrVal_881 (Array Int Int)) (v_ArrVal_879 Int) (v_ArrVal_878 Int) (v_ArrVal_882 (Array Int Int)) (|v_ULTIMATE.start_create_fresh_int_array_~i~2#1_97| Int)) (or (< |v_ULTIMATE.start_create_fresh_int_array_~i~2#1_98| (+ |c_ULTIMATE.start_create_fresh_int_array_~i~2#1| 1)) (<= 0 (+ (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* |v_ULTIMATE.start_create_fresh_int_array_~i~2#1_98| 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) v_ArrVal_878) (+ (* |v_ULTIMATE.start_create_fresh_int_array_~i~2#1_97| 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) v_ArrVal_879)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_881) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_882) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 4294967295)) (< |v_ULTIMATE.start_create_fresh_int_array_~i~2#1_97| (+ |v_ULTIMATE.start_create_fresh_int_array_~i~2#1_98| 1)))) is different from false [2022-11-16 12:45:24,458 INFO L321 Elim1Store]: treesize reduction 94, result has 28.2 percent of original size [2022-11-16 12:45:24,459 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 3 case distinctions, treesize of input 41 treesize of output 52 [2022-11-16 12:45:24,471 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:45:24,471 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 72 treesize of output 70 [2022-11-16 12:45:24,478 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 28 treesize of output 26 [2022-11-16 12:45:24,484 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 54 treesize of output 50 [2022-11-16 12:45:29,119 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2022-11-16 12:45:29,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181098251] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:45:29,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:45:29,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 20] total 52 [2022-11-16 12:45:29,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116234168] [2022-11-16 12:45:29,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:45:29,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-16 12:45:29,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:45:29,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-16 12:45:29,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=2167, Unknown=37, NotChecked=294, Total=2756 [2022-11-16 12:45:29,129 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 140 [2022-11-16 12:45:29,133 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 228 transitions, 2045 flow. Second operand has 53 states, 53 states have (on average 75.60377358490567) internal successors, (4007), 53 states have internal predecessors, (4007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:29,133 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:45:29,133 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 140 [2022-11-16 12:45:29,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:45:35,304 INFO L130 PetriNetUnfolder]: 4517/13474 cut-off events. [2022-11-16 12:45:35,304 INFO L131 PetriNetUnfolder]: For 83181/84096 co-relation queries the response was YES. [2022-11-16 12:45:35,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49429 conditions, 13474 events. 4517/13474 cut-off events. For 83181/84096 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 151496 event pairs, 1564 based on Foata normal form. 593/13708 useless extension candidates. Maximal degree in co-relation 49373. Up to 3874 conditions per place. [2022-11-16 12:45:35,453 INFO L137 encePairwiseOnDemand]: 117/140 looper letters, 84 selfloop transitions, 68 changer transitions 0/254 dead transitions. [2022-11-16 12:45:35,453 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 254 transitions, 2665 flow [2022-11-16 12:45:35,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-16 12:45:35,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-11-16 12:45:35,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1903 transitions. [2022-11-16 12:45:35,456 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5437142857142857 [2022-11-16 12:45:35,456 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1903 transitions. [2022-11-16 12:45:35,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1903 transitions. [2022-11-16 12:45:35,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:45:35,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1903 transitions. [2022-11-16 12:45:35,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 76.12) internal successors, (1903), 25 states have internal predecessors, (1903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:35,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 140.0) internal successors, (3640), 26 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:35,461 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 140.0) internal successors, (3640), 26 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:35,461 INFO L175 Difference]: Start difference. First operand has 296 places, 228 transitions, 2045 flow. Second operand 25 states and 1903 transitions. [2022-11-16 12:45:35,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 254 transitions, 2665 flow [2022-11-16 12:45:35,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 254 transitions, 2622 flow, removed 3 selfloop flow, removed 12 redundant places. [2022-11-16 12:45:35,665 INFO L231 Difference]: Finished difference. Result has 308 places, 227 transitions, 2132 flow [2022-11-16 12:45:35,665 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=1996, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2132, PETRI_PLACES=308, PETRI_TRANSITIONS=227} [2022-11-16 12:45:35,666 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 190 predicate places. [2022-11-16 12:45:35,666 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 227 transitions, 2132 flow [2022-11-16 12:45:35,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 75.60377358490567) internal successors, (4007), 53 states have internal predecessors, (4007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:35,666 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:45:35,667 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:45:35,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-16 12:45:35,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:45:35,867 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:45:35,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:45:35,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1472180619, now seen corresponding path program 1 times [2022-11-16 12:45:35,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:45:35,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164222493] [2022-11-16 12:45:35,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:45:35,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:45:36,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:36,152 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 12:45:36,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:45:36,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164222493] [2022-11-16 12:45:36,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164222493] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:45:36,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104331025] [2022-11-16 12:45:36,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:45:36,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:45:36,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:45:36,154 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:45:36,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-16 12:45:36,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:36,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:45:36,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:45:36,391 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 12:45:36,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:45:36,438 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 12:45:36,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104331025] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:45:36,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:45:36,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-16 12:45:36,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644620489] [2022-11-16 12:45:36,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:45:36,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:45:36,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:45:36,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:45:36,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:45:36,442 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 140 [2022-11-16 12:45:36,442 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 227 transitions, 2132 flow. Second operand has 12 states, 12 states have (on average 107.75) internal successors, (1293), 12 states have internal predecessors, (1293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:36,442 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:45:36,443 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 140 [2022-11-16 12:45:36,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:45:42,391 INFO L130 PetriNetUnfolder]: 5350/15634 cut-off events. [2022-11-16 12:45:42,391 INFO L131 PetriNetUnfolder]: For 163689/165572 co-relation queries the response was YES. [2022-11-16 12:45:42,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71662 conditions, 15634 events. 5350/15634 cut-off events. For 163689/165572 co-relation queries the response was YES. Maximal size of possible extension queue 820. Compared 190325 event pairs, 655 based on Foata normal form. 1461/16709 useless extension candidates. Maximal degree in co-relation 71606. Up to 2581 conditions per place. [2022-11-16 12:45:42,558 INFO L137 encePairwiseOnDemand]: 133/140 looper letters, 200 selfloop transitions, 26 changer transitions 0/399 dead transitions. [2022-11-16 12:45:42,559 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 399 transitions, 4995 flow [2022-11-16 12:45:42,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 12:45:42,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-16 12:45:42,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2016 transitions. [2022-11-16 12:45:42,562 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8 [2022-11-16 12:45:42,563 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2016 transitions. [2022-11-16 12:45:42,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2016 transitions. [2022-11-16 12:45:42,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:45:42,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2016 transitions. [2022-11-16 12:45:42,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 112.0) internal successors, (2016), 18 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:42,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 140.0) internal successors, (2660), 19 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:42,567 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 140.0) internal successors, (2660), 19 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:42,567 INFO L175 Difference]: Start difference. First operand has 308 places, 227 transitions, 2132 flow. Second operand 18 states and 2016 transitions. [2022-11-16 12:45:42,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 399 transitions, 4995 flow [2022-11-16 12:45:42,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 399 transitions, 4887 flow, removed 5 selfloop flow, removed 22 redundant places. [2022-11-16 12:45:42,747 INFO L231 Difference]: Finished difference. Result has 307 places, 241 transitions, 2226 flow [2022-11-16 12:45:42,747 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=2030, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2226, PETRI_PLACES=307, PETRI_TRANSITIONS=241} [2022-11-16 12:45:42,748 INFO L288 CegarLoopForPetriNet]: 118 programPoint places, 189 predicate places. [2022-11-16 12:45:42,748 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 241 transitions, 2226 flow [2022-11-16 12:45:42,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 107.75) internal successors, (1293), 12 states have internal predecessors, (1293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:42,748 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:45:42,748 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:45:42,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-16 12:45:42,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-16 12:45:42,949 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:45:42,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:45:42,950 INFO L85 PathProgramCache]: Analyzing trace with hash -337433618, now seen corresponding path program 2 times [2022-11-16 12:45:42,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:45:42,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229381100] [2022-11-16 12:45:42,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:45:42,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:45:42,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:43,933 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:43,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:45:43,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229381100] [2022-11-16 12:45:43,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229381100] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:45:43,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982200485] [2022-11-16 12:45:43,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:45:43,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:45:43,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:45:43,935 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:45:43,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a061258-102a-4cf5-8082-7c91fd6601c8/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-16 12:45:44,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:45:44,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:45:44,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-16 12:45:44,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:45:44,568 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 [2022-11-16 12:45:44,795 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-16 12:45:44,796 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 1 case distinctions, treesize of input 27 treesize of output 26 [2022-11-16 12:45:45,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:45,057 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 [2022-11-16 12:45:45,280 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:45,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:45:45,678 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_943 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_943) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) (+ |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset| 4)) 9223372039002259456))) is different from false [2022-11-16 12:45:46,354 INFO L321 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2022-11-16 12:45:46,355 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 33 treesize of output 39 [2022-11-16 12:45:46,365 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:45:46,365 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 [2022-11-16 12:45:48,829 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:48,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982200485] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:45:48,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:45:48,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 54 [2022-11-16 12:45:48,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336178350] [2022-11-16 12:45:48,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:45:48,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-16 12:45:48,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:45:48,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-16 12:45:48,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=2609, Unknown=35, NotChecked=104, Total=2970 [2022-11-16 12:45:48,833 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 140 [2022-11-16 12:45:48,835 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 241 transitions, 2226 flow. Second operand has 55 states, 55 states have (on average 72.85454545454546) internal successors, (4007), 55 states have internal predecessors, (4007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:48,835 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:45:48,836 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 140 [2022-11-16 12:45:48,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand