./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_73-funloop_hard_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873657d4-acad-4e74-9cbb-5b21bbc1369e/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873657d4-acad-4e74-9cbb-5b21bbc1369e/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873657d4-acad-4e74-9cbb-5b21bbc1369e/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873657d4-acad-4e74-9cbb-5b21bbc1369e/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_73-funloop_hard_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873657d4-acad-4e74-9cbb-5b21bbc1369e/bin/utaipan-Q6hlc19bkW/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873657d4-acad-4e74-9cbb-5b21bbc1369e/bin/utaipan-Q6hlc19bkW --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c8af2e9e80aefb6a93651d6c869df13510f679bd9566c8571973545c9393aab5 --- 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-4e7fbc6 [2022-11-23 14:53:26,095 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:53:26,098 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:53:26,132 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:53:26,132 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:53:26,136 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:53:26,139 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:53:26,143 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:53:26,145 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:53:26,151 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:53:26,153 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:53:26,156 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:53:26,156 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:53:26,159 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:53:26,161 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:53:26,164 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:53:26,166 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:53:26,168 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:53:26,170 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:53:26,176 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:53:26,178 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:53:26,180 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:53:26,181 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:53:26,182 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:53:26,187 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:53:26,188 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:53:26,188 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:53:26,189 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:53:26,190 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:53:26,191 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:53:26,191 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:53:26,192 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:53:26,193 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:53:26,194 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:53:26,199 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:53:26,200 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:53:26,201 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:53:26,202 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:53:26,202 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:53:26,206 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:53:26,207 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:53:26,208 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873657d4-acad-4e74-9cbb-5b21bbc1369e/bin/utaipan-Q6hlc19bkW/config/svcomp-Overflow-32bit-Taipan_Default.epf [2022-11-23 14:53:26,253 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:53:26,253 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:53:26,254 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:53:26,254 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:53:26,255 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:53:26,256 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:53:26,256 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:53:26,256 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:53:26,257 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:53:26,257 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:53:26,258 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:53:26,259 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:53:26,259 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:53:26,259 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:53:26,260 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:53:26,260 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:53:26,260 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:53:26,261 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:53:26,262 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:53:26,263 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:53:26,263 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 14:53:26,263 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:53:26,264 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:53:26,264 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:53:26,264 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:53:26,264 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:53:26,265 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:53:26,266 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-23 14:53:26,268 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:53:26,268 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:53:26,268 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:53:26,269 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:53:26,269 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:53:26,269 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:53:26,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:53:26,270 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:53:26,270 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:53:26,271 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:53:26,271 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:53:26,271 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:53:26,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:53:26,272 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:53:26,272 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:53:26,272 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_873657d4-acad-4e74-9cbb-5b21bbc1369e/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873657d4-acad-4e74-9cbb-5b21bbc1369e/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8af2e9e80aefb6a93651d6c869df13510f679bd9566c8571973545c9393aab5 [2022-11-23 14:53:26,696 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:53:26,738 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:53:26,741 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:53:26,742 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:53:26,743 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:53:26,745 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873657d4-acad-4e74-9cbb-5b21bbc1369e/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/goblint-regression/28-race_reach_73-funloop_hard_racefree.i [2022-11-23 14:53:30,341 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:53:30,799 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:53:30,799 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873657d4-acad-4e74-9cbb-5b21bbc1369e/sv-benchmarks/c/goblint-regression/28-race_reach_73-funloop_hard_racefree.i [2022-11-23 14:53:30,815 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873657d4-acad-4e74-9cbb-5b21bbc1369e/bin/utaipan-Q6hlc19bkW/data/0125da522/2f5ec28d1c9f4e44ab697d819d847ed3/FLAG54e55863b [2022-11-23 14:53:30,834 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873657d4-acad-4e74-9cbb-5b21bbc1369e/bin/utaipan-Q6hlc19bkW/data/0125da522/2f5ec28d1c9f4e44ab697d819d847ed3 [2022-11-23 14:53:30,837 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:53:30,839 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:53:30,840 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:53:30,841 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:53:30,845 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:53:30,846 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:53:30" (1/1) ... [2022-11-23 14:53:30,848 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ec673a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:53:30, skipping insertion in model container [2022-11-23 14:53:30,848 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:53:30" (1/1) ... [2022-11-23 14:53:30,857 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:53:30,934 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:53:31,639 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873657d4-acad-4e74-9cbb-5b21bbc1369e/sv-benchmarks/c/goblint-regression/28-race_reach_73-funloop_hard_racefree.i[41323,41336] [2022-11-23 14:53:31,680 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:53:31,700 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:53:31,769 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873657d4-acad-4e74-9cbb-5b21bbc1369e/sv-benchmarks/c/goblint-regression/28-race_reach_73-funloop_hard_racefree.i[41323,41336] [2022-11-23 14:53:31,796 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:53:31,877 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:53:31,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:53:31 WrapperNode [2022-11-23 14:53:31,878 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:53:31,880 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:53:31,881 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:53:31,881 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:53:31,893 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:53:31" (1/1) ... [2022-11-23 14:53:31,918 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:53:31" (1/1) ... [2022-11-23 14:53:31,953 INFO L138 Inliner]: procedures = 271, calls = 41, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 269 [2022-11-23 14:53:31,953 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:53:31,954 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:53:31,955 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:53:31,955 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:53:31,967 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:53:31" (1/1) ... [2022-11-23 14:53:31,967 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:53:31" (1/1) ... [2022-11-23 14:53:31,973 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:53:31" (1/1) ... [2022-11-23 14:53:31,974 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:53:31" (1/1) ... [2022-11-23 14:53:31,986 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:53:31" (1/1) ... [2022-11-23 14:53:31,994 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:53:31" (1/1) ... [2022-11-23 14:53:31,997 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:53:31" (1/1) ... [2022-11-23 14:53:31,999 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:53:31" (1/1) ... [2022-11-23 14:53:32,003 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:53:32,004 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:53:32,004 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:53:32,005 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:53:32,006 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:53:31" (1/1) ... [2022-11-23 14:53:32,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:53:32,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873657d4-acad-4e74-9cbb-5b21bbc1369e/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:53:32,045 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873657d4-acad-4e74-9cbb-5b21bbc1369e/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:53:32,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873657d4-acad-4e74-9cbb-5b21bbc1369e/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:53:32,111 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 14:53:32,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 14:53:32,111 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 14:53:32,112 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 14:53:32,112 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-23 14:53:32,112 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:53:32,112 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-23 14:53:32,112 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-23 14:53:32,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:53:32,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:53:32,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:53:32,115 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 14:53:32,391 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:53:32,394 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:53:33,019 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:53:33,030 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:53:33,031 INFO L300 CfgBuilder]: Removed 35 assume(true) statements. [2022-11-23 14:53:33,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:53:33 BoogieIcfgContainer [2022-11-23 14:53:33,034 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:53:33,037 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:53:33,037 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:53:33,041 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:53:33,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:53:30" (1/3) ... [2022-11-23 14:53:33,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59e7f756 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:53:33, skipping insertion in model container [2022-11-23 14:53:33,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:53:31" (2/3) ... [2022-11-23 14:53:33,043 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59e7f756 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:53:33, skipping insertion in model container [2022-11-23 14:53:33,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:53:33" (3/3) ... [2022-11-23 14:53:33,045 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_73-funloop_hard_racefree.i [2022-11-23 14:53:33,056 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-23 14:53:33,070 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:53:33,070 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2022-11-23 14:53:33,070 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 14:53:33,171 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-23 14:53:33,227 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 14:53:33,253 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 254 places, 296 transitions, 600 flow [2022-11-23 14:53:33,265 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 254 places, 296 transitions, 600 flow [2022-11-23 14:53:33,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 254 places, 296 transitions, 600 flow [2022-11-23 14:53:33,562 INFO L130 PetriNetUnfolder]: 73/453 cut-off events. [2022-11-23 14:53:33,562 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-23 14:53:33,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 459 conditions, 453 events. 73/453 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2189 event pairs, 0 based on Foata normal form. 0/345 useless extension candidates. Maximal degree in co-relation 248. Up to 8 conditions per place. [2022-11-23 14:53:33,600 INFO L119 LiptonReduction]: Number of co-enabled transitions 27388 [2022-11-23 14:53:40,718 INFO L134 LiptonReduction]: Checked pairs total: 45153 [2022-11-23 14:53:40,719 INFO L136 LiptonReduction]: Total number of compositions: 275 [2022-11-23 14:53:40,730 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 86 places, 122 transitions, 252 flow [2022-11-23 14:53:40,848 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1354 states, 1235 states have (on average 3.119838056680162) internal successors, (3853), 1353 states have internal predecessors, (3853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:53:40,875 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:53:40,886 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=FINITE_AUTOMATA, 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;@2720ebb2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:53:40,886 INFO L358 AbstractCegarLoop]: Starting to check reachability of 29 error locations. [2022-11-23 14:53:40,893 INFO L276 IsEmpty]: Start isEmpty. Operand has 1354 states, 1235 states have (on average 3.119838056680162) internal successors, (3853), 1353 states have internal predecessors, (3853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:53:40,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-23 14:53:40,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:53:40,901 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-23 14:53:40,902 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2022-11-23 14:53:40,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:53:40,914 INFO L85 PathProgramCache]: Analyzing trace with hash 36960, now seen corresponding path program 1 times [2022-11-23 14:53:40,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:53:40,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677799035] [2022-11-23 14:53:40,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:53:40,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:53:41,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:53:41,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:53:41,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:53:41,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677799035] [2022-11-23 14:53:41,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677799035] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:53:41,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:53:41,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 14:53:41,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709939522] [2022-11-23 14:53:41,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:53:41,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:53:41,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:53:41,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:53:41,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:53:41,416 INFO L87 Difference]: Start difference. First operand has 1354 states, 1235 states have (on average 3.119838056680162) internal successors, (3853), 1353 states have internal predecessors, (3853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:53:41,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:53:41,711 INFO L93 Difference]: Finished difference Result 1354 states and 2761 transitions. [2022-11-23 14:53:41,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:53:41,715 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-23 14:53:41,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:53:41,739 INFO L225 Difference]: With dead ends: 1354 [2022-11-23 14:53:41,740 INFO L226 Difference]: Without dead ends: 1343 [2022-11-23 14:53:41,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:53:41,745 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:53:41,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:53:41,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1343 states. [2022-11-23 14:53:41,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1343 to 1343. [2022-11-23 14:53:41,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1343 states, 1227 states have (on average 2.23879380603097) internal successors, (2747), 1342 states have internal predecessors, (2747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:53:41,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 2747 transitions. [2022-11-23 14:53:41,924 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 2747 transitions. Word has length 2 [2022-11-23 14:53:41,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:53:41,925 INFO L495 AbstractCegarLoop]: Abstraction has 1343 states and 2747 transitions. [2022-11-23 14:53:41,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:53:41,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 2747 transitions. [2022-11-23 14:53:41,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-23 14:53:41,927 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:53:41,927 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-23 14:53:41,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:53:41,928 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2022-11-23 14:53:41,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:53:41,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1148806, now seen corresponding path program 1 times [2022-11-23 14:53:41,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:53:41,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415030078] [2022-11-23 14:53:41,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:53:41,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:53:41,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:53:42,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:53:42,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:53:42,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415030078] [2022-11-23 14:53:42,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415030078] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:53:42,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:53:42,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:53:42,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361037999] [2022-11-23 14:53:42,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:53:42,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:53:42,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:53:42,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:53:42,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:53:42,012 INFO L87 Difference]: Start difference. First operand 1343 states and 2747 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:53:42,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:53:42,154 INFO L93 Difference]: Finished difference Result 1342 states and 2746 transitions. [2022-11-23 14:53:42,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:53:42,155 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-23 14:53:42,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:53:42,163 INFO L225 Difference]: With dead ends: 1342 [2022-11-23 14:53:42,163 INFO L226 Difference]: Without dead ends: 1342 [2022-11-23 14:53:42,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:53:42,165 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 85 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:53:42,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 12 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:53:42,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2022-11-23 14:53:42,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 1342. [2022-11-23 14:53:42,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1342 states, 1227 states have (on average 2.2379788101059495) internal successors, (2746), 1341 states have internal predecessors, (2746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:53:42,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 2746 transitions. [2022-11-23 14:53:42,217 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 2746 transitions. Word has length 3 [2022-11-23 14:53:42,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:53:42,217 INFO L495 AbstractCegarLoop]: Abstraction has 1342 states and 2746 transitions. [2022-11-23 14:53:42,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:53:42,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 2746 transitions. [2022-11-23 14:53:42,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-23 14:53:42,219 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:53:42,219 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 14:53:42,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 14:53:42,220 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2022-11-23 14:53:42,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:53:42,220 INFO L85 PathProgramCache]: Analyzing trace with hash -133720847, now seen corresponding path program 1 times [2022-11-23 14:53:42,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:53:42,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071028784] [2022-11-23 14:53:42,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:53:42,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:53:42,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:53:42,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:53:42,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:53:42,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071028784] [2022-11-23 14:53:42,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071028784] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:53:42,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060615877] [2022-11-23 14:53:42,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:53:42,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:53:42,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873657d4-acad-4e74-9cbb-5b21bbc1369e/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:53:42,304 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873657d4-acad-4e74-9cbb-5b21bbc1369e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:53:42,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873657d4-acad-4e74-9cbb-5b21bbc1369e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:53:42,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:53:42,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:53:42,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:53:42,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:53:42,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:53:42,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:53:42,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060615877] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:53:42,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [614523478] [2022-11-23 14:53:42,531 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-23 14:53:42,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:53:42,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-23 14:53:42,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795646260] [2022-11-23 14:53:42,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:53:42,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:53:42,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:53:42,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:53:42,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:53:42,538 INFO L87 Difference]: Start difference. First operand 1342 states and 2746 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:53:42,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:53:42,818 INFO L93 Difference]: Finished difference Result 1345 states and 2749 transitions. [2022-11-23 14:53:42,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:53:42,819 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-23 14:53:42,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:53:42,826 INFO L225 Difference]: With dead ends: 1345 [2022-11-23 14:53:42,827 INFO L226 Difference]: Without dead ends: 1345 [2022-11-23 14:53:42,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:53:42,829 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:53:42,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:53:42,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1345 states. [2022-11-23 14:53:42,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1345 to 1345. [2022-11-23 14:53:42,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 1230 states have (on average 2.234959349593496) internal successors, (2749), 1344 states have internal predecessors, (2749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:53:42,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 2749 transitions. [2022-11-23 14:53:42,878 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 2749 transitions. Word has length 6 [2022-11-23 14:53:42,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:53:42,878 INFO L495 AbstractCegarLoop]: Abstraction has 1345 states and 2749 transitions. [2022-11-23 14:53:42,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:53:42,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 2749 transitions. [2022-11-23 14:53:42,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-23 14:53:42,880 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:53:42,880 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2022-11-23 14:53:42,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873657d4-acad-4e74-9cbb-5b21bbc1369e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 14:53:43,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873657d4-acad-4e74-9cbb-5b21bbc1369e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-23 14:53:43,087 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2022-11-23 14:53:43,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:53:43,088 INFO L85 PathProgramCache]: Analyzing trace with hash 68066391, now seen corresponding path program 2 times [2022-11-23 14:53:43,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:53:43,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291312049] [2022-11-23 14:53:43,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:53:43,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:53:43,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:53:43,228 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 14:53:43,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:53:43,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291312049] [2022-11-23 14:53:43,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291312049] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:53:43,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:53:43,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:53:43,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882322706] [2022-11-23 14:53:43,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:53:43,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:53:43,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:53:43,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:53:43,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:53:43,234 INFO L87 Difference]: Start difference. First operand 1345 states and 2749 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:53:43,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:53:43,470 INFO L93 Difference]: Finished difference Result 1260 states and 2610 transitions. [2022-11-23 14:53:43,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:53:43,471 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-23 14:53:43,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:53:43,480 INFO L225 Difference]: With dead ends: 1260 [2022-11-23 14:53:43,480 INFO L226 Difference]: Without dead ends: 1260 [2022-11-23 14:53:43,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:53:43,482 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 26 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:53:43,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 24 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:53:43,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2022-11-23 14:53:43,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 1260. [2022-11-23 14:53:43,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1260 states, 1169 states have (on average 2.23267750213858) internal successors, (2610), 1259 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:53:43,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1260 states to 1260 states and 2610 transitions. [2022-11-23 14:53:43,543 INFO L78 Accepts]: Start accepts. Automaton has 1260 states and 2610 transitions. Word has length 9 [2022-11-23 14:53:43,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:53:43,543 INFO L495 AbstractCegarLoop]: Abstraction has 1260 states and 2610 transitions. [2022-11-23 14:53:43,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:53:43,544 INFO L276 IsEmpty]: Start isEmpty. Operand 1260 states and 2610 transitions. [2022-11-23 14:53:43,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 14:53:43,545 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:53:43,545 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2022-11-23 14:53:43,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 14:53:43,546 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2022-11-23 14:53:43,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:53:43,547 INFO L85 PathProgramCache]: Analyzing trace with hash 987397076, now seen corresponding path program 1 times [2022-11-23 14:53:43,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:53:43,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001996727] [2022-11-23 14:53:43,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:53:43,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:53:43,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:53:43,703 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:53:43,704 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:53:43,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001996727] [2022-11-23 14:53:43,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001996727] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:53:43,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470690169] [2022-11-23 14:53:43,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:53:43,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:53:43,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873657d4-acad-4e74-9cbb-5b21bbc1369e/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:53:43,707 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873657d4-acad-4e74-9cbb-5b21bbc1369e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:53:43,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873657d4-acad-4e74-9cbb-5b21bbc1369e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 14:53:43,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:53:43,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 14:53:43,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:53:43,859 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:53:43,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:53:43,942 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:53:43,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470690169] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:53:43,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [90779150] [2022-11-23 14:53:43,945 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-23 14:53:43,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:53:43,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-23 14:53:43,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603685683] [2022-11-23 14:53:43,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:53:43,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 14:53:43,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:53:43,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 14:53:43,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-23 14:53:43,958 INFO L87 Difference]: Start difference. First operand 1260 states and 2610 transitions. Second operand has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:53:44,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:53:44,291 INFO L93 Difference]: Finished difference Result 1266 states and 2616 transitions. [2022-11-23 14:53:44,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 14:53:44,291 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-23 14:53:44,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:53:44,299 INFO L225 Difference]: With dead ends: 1266 [2022-11-23 14:53:44,299 INFO L226 Difference]: Without dead ends: 1266 [2022-11-23 14:53:44,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-23 14:53:44,300 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:53:44,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 60 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:53:44,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1266 states. [2022-11-23 14:53:44,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1266 to 1266. [2022-11-23 14:53:44,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1175 states have (on average 2.226382978723404) internal successors, (2616), 1265 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:53:44,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 2616 transitions. [2022-11-23 14:53:44,342 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 2616 transitions. Word has length 11 [2022-11-23 14:53:44,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:53:44,342 INFO L495 AbstractCegarLoop]: Abstraction has 1266 states and 2616 transitions. [2022-11-23 14:53:44,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:53:44,343 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 2616 transitions. [2022-11-23 14:53:44,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-23 14:53:44,344 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:53:44,344 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2022-11-23 14:53:44,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873657d4-acad-4e74-9cbb-5b21bbc1369e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 14:53:44,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873657d4-acad-4e74-9cbb-5b21bbc1369e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:53:44,551 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2022-11-23 14:53:44,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:53:44,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1115841940, now seen corresponding path program 2 times [2022-11-23 14:53:44,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:53:44,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383253159] [2022-11-23 14:53:44,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:53:44,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:53:44,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 14:53:44,586 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 14:53:44,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 14:53:44,630 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-23 14:53:44,639 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 14:53:44,641 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (28 of 29 remaining) [2022-11-23 14:53:44,643 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (27 of 29 remaining) [2022-11-23 14:53:44,644 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (26 of 29 remaining) [2022-11-23 14:53:44,644 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (25 of 29 remaining) [2022-11-23 14:53:44,644 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (24 of 29 remaining) [2022-11-23 14:53:44,645 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONINTEGER_OVERFLOW (23 of 29 remaining) [2022-11-23 14:53:44,645 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14ASSERT_VIOLATIONINTEGER_OVERFLOW (22 of 29 remaining) [2022-11-23 14:53:44,645 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONINTEGER_OVERFLOW (21 of 29 remaining) [2022-11-23 14:53:44,646 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11ASSERT_VIOLATIONINTEGER_OVERFLOW (20 of 29 remaining) [2022-11-23 14:53:44,646 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONINTEGER_OVERFLOW (19 of 29 remaining) [2022-11-23 14:53:44,646 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONINTEGER_OVERFLOW (18 of 29 remaining) [2022-11-23 14:53:44,647 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW (17 of 29 remaining) [2022-11-23 14:53:44,647 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13ASSERT_VIOLATIONINTEGER_OVERFLOW (16 of 29 remaining) [2022-11-23 14:53:44,647 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 29 remaining) [2022-11-23 14:53:44,648 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 29 remaining) [2022-11-23 14:53:44,648 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 29 remaining) [2022-11-23 14:53:44,648 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 29 remaining) [2022-11-23 14:53:44,649 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 29 remaining) [2022-11-23 14:53:44,651 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 29 remaining) [2022-11-23 14:53:44,652 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 29 remaining) [2022-11-23 14:53:44,652 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 29 remaining) [2022-11-23 14:53:44,652 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 29 remaining) [2022-11-23 14:53:44,653 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 29 remaining) [2022-11-23 14:53:44,653 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 29 remaining) [2022-11-23 14:53:44,653 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 29 remaining) [2022-11-23 14:53:44,653 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 29 remaining) [2022-11-23 14:53:44,654 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 29 remaining) [2022-11-23 14:53:44,654 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 29 remaining) [2022-11-23 14:53:44,654 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 29 remaining) [2022-11-23 14:53:44,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 14:53:44,658 INFO L444 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1] [2022-11-23 14:53:44,661 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-23 14:53:44,661 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-23 14:53:44,706 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-23 14:53:44,711 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 14:53:44,711 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 325 places, 380 transitions, 778 flow [2022-11-23 14:53:44,712 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 325 places, 380 transitions, 778 flow [2022-11-23 14:53:44,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 325 places, 380 transitions, 778 flow [2022-11-23 14:53:44,891 INFO L130 PetriNetUnfolder]: 118/731 cut-off events. [2022-11-23 14:53:44,892 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-23 14:53:44,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 745 conditions, 731 events. 118/731 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 3930 event pairs, 0 based on Foata normal form. 0/555 useless extension candidates. Maximal degree in co-relation 455. Up to 12 conditions per place. [2022-11-23 14:53:44,950 INFO L119 LiptonReduction]: Number of co-enabled transitions 71340 [2022-11-23 14:53:52,868 INFO L134 LiptonReduction]: Checked pairs total: 116863 [2022-11-23 14:53:52,868 INFO L136 LiptonReduction]: Total number of compositions: 340 [2022-11-23 14:53:52,869 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 115 places, 162 transitions, 342 flow [2022-11-23 14:53:55,008 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 35459 states, 34584 states have (on average 4.3806384455239415) internal successors, (151500), 35458 states have internal predecessors, (151500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:53:55,009 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:53:55,010 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=FINITE_AUTOMATA, 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;@2720ebb2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:53:55,011 INFO L358 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2022-11-23 14:53:55,273 INFO L276 IsEmpty]: Start isEmpty. Operand has 35459 states, 34584 states have (on average 4.3806384455239415) internal successors, (151500), 35458 states have internal predecessors, (151500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:53:55,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-23 14:53:55,274 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:53:55,274 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-23 14:53:55,275 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2022-11-23 14:53:55,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:53:55,282 INFO L85 PathProgramCache]: Analyzing trace with hash 62773, now seen corresponding path program 1 times [2022-11-23 14:53:55,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:53:55,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034924977] [2022-11-23 14:53:55,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:53:55,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:53:55,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:53:55,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:53:55,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:53:55,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034924977] [2022-11-23 14:53:55,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034924977] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:53:55,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:53:55,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 14:53:55,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855191702] [2022-11-23 14:53:55,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:53:55,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 14:53:55,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:53:55,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 14:53:55,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 14:53:55,386 INFO L87 Difference]: Start difference. First operand has 35459 states, 34584 states have (on average 4.3806384455239415) internal successors, (151500), 35458 states have internal predecessors, (151500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 1 states have (on average 2.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:53:56,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:53:56,231 INFO L93 Difference]: Finished difference Result 35458 states and 108787 transitions. [2022-11-23 14:53:56,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 14:53:56,235 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 2.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-23 14:53:56,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:53:56,974 INFO L225 Difference]: With dead ends: 35458 [2022-11-23 14:53:56,974 INFO L226 Difference]: Without dead ends: 35446 [2022-11-23 14:53:56,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 14:53:56,975 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:53:56,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:53:57,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35446 states. [2022-11-23 14:53:58,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35446 to 35446. [2022-11-23 14:53:58,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35446 states, 34576 states have (on average 3.14579477093938) internal successors, (108769), 35445 states have internal predecessors, (108769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:53:59,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35446 states to 35446 states and 108769 transitions. [2022-11-23 14:53:59,712 INFO L78 Accepts]: Start accepts. Automaton has 35446 states and 108769 transitions. Word has length 2 [2022-11-23 14:53:59,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:53:59,713 INFO L495 AbstractCegarLoop]: Abstraction has 35446 states and 108769 transitions. [2022-11-23 14:53:59,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 2.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:53:59,714 INFO L276 IsEmpty]: Start isEmpty. Operand 35446 states and 108769 transitions. [2022-11-23 14:53:59,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-23 14:53:59,714 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:53:59,715 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-23 14:53:59,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 14:53:59,715 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2022-11-23 14:53:59,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:53:59,716 INFO L85 PathProgramCache]: Analyzing trace with hash 62712, now seen corresponding path program 1 times [2022-11-23 14:53:59,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:53:59,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070843135] [2022-11-23 14:53:59,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:53:59,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:53:59,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:53:59,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:53:59,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:53:59,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070843135] [2022-11-23 14:53:59,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070843135] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:53:59,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:53:59,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 14:53:59,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749763316] [2022-11-23 14:53:59,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:53:59,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:53:59,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:53:59,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:53:59,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:53:59,767 INFO L87 Difference]: Start difference. First operand 35446 states and 108769 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:54:00,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:54:00,417 INFO L93 Difference]: Finished difference Result 35447 states and 108770 transitions. [2022-11-23 14:54:00,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:54:00,419 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-23 14:54:00,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:54:00,829 INFO L225 Difference]: With dead ends: 35447 [2022-11-23 14:54:00,830 INFO L226 Difference]: Without dead ends: 35447 [2022-11-23 14:54:00,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:54:00,848 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:54:00,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:54:00,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35447 states. [2022-11-23 14:54:02,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35447 to 35447. [2022-11-23 14:54:02,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35447 states, 34577 states have (on average 3.1457327124967462) internal successors, (108770), 35446 states have internal predecessors, (108770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:54:02,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35447 states to 35447 states and 108770 transitions. [2022-11-23 14:54:02,467 INFO L78 Accepts]: Start accepts. Automaton has 35447 states and 108770 transitions. Word has length 2 [2022-11-23 14:54:02,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:54:02,467 INFO L495 AbstractCegarLoop]: Abstraction has 35447 states and 108770 transitions. [2022-11-23 14:54:02,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:54:02,468 INFO L276 IsEmpty]: Start isEmpty. Operand 35447 states and 108770 transitions. [2022-11-23 14:54:02,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-23 14:54:02,468 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:54:02,469 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-23 14:54:02,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 14:54:02,469 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2022-11-23 14:54:02,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:54:02,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1947822, now seen corresponding path program 1 times [2022-11-23 14:54:02,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:54:02,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17565698] [2022-11-23 14:54:02,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:54:02,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:54:02,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:54:02,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:54:02,537 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:54:02,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17565698] [2022-11-23 14:54:02,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17565698] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:54:02,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661510185] [2022-11-23 14:54:02,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:54:02,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:54:02,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873657d4-acad-4e74-9cbb-5b21bbc1369e/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:54:02,539 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873657d4-acad-4e74-9cbb-5b21bbc1369e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:54:02,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873657d4-acad-4e74-9cbb-5b21bbc1369e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 14:54:02,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:54:02,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:54:02,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:54:02,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:54:02,665 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:54:02,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661510185] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:54:02,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:54:02,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2022-11-23 14:54:02,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758935855] [2022-11-23 14:54:02,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:54:02,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:54:02,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:54:02,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:54:02,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:54:02,669 INFO L87 Difference]: Start difference. First operand 35447 states and 108770 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:54:03,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:54:03,333 INFO L93 Difference]: Finished difference Result 35446 states and 108769 transitions. [2022-11-23 14:54:03,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:54:03,334 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-23 14:54:03,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:54:03,544 INFO L225 Difference]: With dead ends: 35446 [2022-11-23 14:54:03,544 INFO L226 Difference]: Without dead ends: 35446 [2022-11-23 14:54:03,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:54:03,545 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 232 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:54:03,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 17 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:54:03,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35446 states. [2022-11-23 14:54:05,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35446 to 35446. [2022-11-23 14:54:05,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35446 states, 34577 states have (on average 3.1457037915377275) internal successors, (108769), 35445 states have internal predecessors, (108769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:54:05,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35446 states to 35446 states and 108769 transitions. [2022-11-23 14:54:05,259 INFO L78 Accepts]: Start accepts. Automaton has 35446 states and 108769 transitions. Word has length 3 [2022-11-23 14:54:05,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:54:05,259 INFO L495 AbstractCegarLoop]: Abstraction has 35446 states and 108769 transitions. [2022-11-23 14:54:05,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:54:05,259 INFO L276 IsEmpty]: Start isEmpty. Operand 35446 states and 108769 transitions. [2022-11-23 14:54:05,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 14:54:05,260 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:54:05,260 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:54:05,265 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873657d4-acad-4e74-9cbb-5b21bbc1369e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-23 14:54:05,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873657d4-acad-4e74-9cbb-5b21bbc1369e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:54:05,462 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2022-11-23 14:54:05,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:54:05,463 INFO L85 PathProgramCache]: Analyzing trace with hash -658733469, now seen corresponding path program 1 times [2022-11-23 14:54:05,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:54:05,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039013939] [2022-11-23 14:54:05,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:54:05,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:54:05,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:54:05,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:54:05,547 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:54:05,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039013939] [2022-11-23 14:54:05,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039013939] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:54:05,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902625447] [2022-11-23 14:54:05,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:54:05,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:54:05,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873657d4-acad-4e74-9cbb-5b21bbc1369e/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:54:05,551 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873657d4-acad-4e74-9cbb-5b21bbc1369e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:54:05,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873657d4-acad-4e74-9cbb-5b21bbc1369e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 14:54:05,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:54:05,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:54:05,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:54:05,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:54:05,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:54:05,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:54:05,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902625447] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:54:05,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1037992492] [2022-11-23 14:54:05,681 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-23 14:54:05,683 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:54:05,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-23 14:54:05,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967980680] [2022-11-23 14:54:05,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:54:05,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:54:05,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:54:05,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:54:05,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:54:05,685 INFO L87 Difference]: Start difference. First operand 35446 states and 108769 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:54:06,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:54:06,231 INFO L93 Difference]: Finished difference Result 35449 states and 108772 transitions. [2022-11-23 14:54:06,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:54:06,232 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-23 14:54:06,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:54:06,434 INFO L225 Difference]: With dead ends: 35449 [2022-11-23 14:54:06,435 INFO L226 Difference]: Without dead ends: 35449 [2022-11-23 14:54:06,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:54:06,436 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:54:06,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 51 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:54:06,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35449 states. [2022-11-23 14:54:07,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35449 to 35449. [2022-11-23 14:54:07,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35449 states, 34580 states have (on average 3.145517640254482) internal successors, (108772), 35448 states have internal predecessors, (108772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:54:08,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35449 states to 35449 states and 108772 transitions. [2022-11-23 14:54:08,024 INFO L78 Accepts]: Start accepts. Automaton has 35449 states and 108772 transitions. Word has length 7 [2022-11-23 14:54:08,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:54:08,024 INFO L495 AbstractCegarLoop]: Abstraction has 35449 states and 108772 transitions. [2022-11-23 14:54:08,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:54:08,024 INFO L276 IsEmpty]: Start isEmpty. Operand 35449 states and 108772 transitions. [2022-11-23 14:54:08,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-23 14:54:08,025 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:54:08,025 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-11-23 14:54:08,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873657d4-acad-4e74-9cbb-5b21bbc1369e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 14:54:08,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873657d4-acad-4e74-9cbb-5b21bbc1369e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 14:54:08,227 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2022-11-23 14:54:08,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:54:08,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1061686061, now seen corresponding path program 2 times [2022-11-23 14:54:08,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:54:08,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359458206] [2022-11-23 14:54:08,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:54:08,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:54:08,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:54:08,346 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 14:54:08,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:54:08,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359458206] [2022-11-23 14:54:08,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359458206] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:54:08,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:54:08,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:54:08,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712310646] [2022-11-23 14:54:08,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:54:08,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:54:08,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:54:08,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:54:08,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:54:08,349 INFO L87 Difference]: Start difference. First operand 35449 states and 108772 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:54:09,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:54:09,182 INFO L93 Difference]: Finished difference Result 35362 states and 108629 transitions. [2022-11-23 14:54:09,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:54:09,183 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-23 14:54:09,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:54:09,346 INFO L225 Difference]: With dead ends: 35362 [2022-11-23 14:54:09,346 INFO L226 Difference]: Without dead ends: 35362 [2022-11-23 14:54:09,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:54:09,348 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 27 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:54:09,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 34 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:54:09,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35362 states. [2022-11-23 14:54:10,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35362 to 35362. [2022-11-23 14:54:10,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35362 states, 34517 states have (on average 3.1471159138975) internal successors, (108629), 35361 states have internal predecessors, (108629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:54:10,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35362 states to 35362 states and 108629 transitions. [2022-11-23 14:54:10,675 INFO L78 Accepts]: Start accepts. Automaton has 35362 states and 108629 transitions. Word has length 10 [2022-11-23 14:54:10,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:54:10,675 INFO L495 AbstractCegarLoop]: Abstraction has 35362 states and 108629 transitions. [2022-11-23 14:54:10,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:54:10,676 INFO L276 IsEmpty]: Start isEmpty. Operand 35362 states and 108629 transitions. [2022-11-23 14:54:10,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-23 14:54:10,677 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:54:10,677 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:54:10,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 14:54:10,677 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2022-11-23 14:54:10,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:54:10,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1204150496, now seen corresponding path program 1 times [2022-11-23 14:54:10,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:54:10,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987848769] [2022-11-23 14:54:10,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:54:10,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:54:10,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:54:10,786 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:54:10,787 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:54:10,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987848769] [2022-11-23 14:54:10,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987848769] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:54:10,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198723671] [2022-11-23 14:54:10,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:54:10,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:54:10,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873657d4-acad-4e74-9cbb-5b21bbc1369e/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:54:10,789 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873657d4-acad-4e74-9cbb-5b21bbc1369e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:54:10,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873657d4-acad-4e74-9cbb-5b21bbc1369e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 14:54:10,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:54:10,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 14:54:10,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:54:10,952 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:54:10,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:54:11,040 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:54:11,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198723671] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:54:11,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [505273296] [2022-11-23 14:54:11,041 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-23 14:54:11,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:54:11,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-23 14:54:11,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724093452] [2022-11-23 14:54:11,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:54:11,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 14:54:11,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:54:11,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 14:54:11,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-23 14:54:11,043 INFO L87 Difference]: Start difference. First operand 35362 states and 108629 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:54:11,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:54:11,593 INFO L93 Difference]: Finished difference Result 35368 states and 108635 transitions. [2022-11-23 14:54:11,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 14:54:11,594 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-23 14:54:11,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:54:11,737 INFO L225 Difference]: With dead ends: 35368 [2022-11-23 14:54:11,737 INFO L226 Difference]: Without dead ends: 35368 [2022-11-23 14:54:11,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-23 14:54:11,738 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:54:11,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 68 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:54:11,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35368 states. [2022-11-23 14:54:12,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35368 to 35368. [2022-11-23 14:54:13,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35368 states, 34523 states have (on average 3.146742751209339) internal successors, (108635), 35367 states have internal predecessors, (108635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:54:13,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35368 states to 35368 states and 108635 transitions. [2022-11-23 14:54:13,212 INFO L78 Accepts]: Start accepts. Automaton has 35368 states and 108635 transitions. Word has length 14 [2022-11-23 14:54:13,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:54:13,212 INFO L495 AbstractCegarLoop]: Abstraction has 35368 states and 108635 transitions. [2022-11-23 14:54:13,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:54:13,213 INFO L276 IsEmpty]: Start isEmpty. Operand 35368 states and 108635 transitions. [2022-11-23 14:54:13,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-23 14:54:13,214 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:54:13,214 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:54:13,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873657d4-acad-4e74-9cbb-5b21bbc1369e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 14:54:13,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873657d4-acad-4e74-9cbb-5b21bbc1369e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-23 14:54:13,419 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2022-11-23 14:54:13,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:54:13,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1602949984, now seen corresponding path program 2 times [2022-11-23 14:54:13,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:54:13,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180838259] [2022-11-23 14:54:13,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:54:13,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:54:13,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:54:13,776 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 14:54:13,777 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:54:13,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180838259] [2022-11-23 14:54:13,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180838259] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:54:13,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:54:13,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:54:13,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356667363] [2022-11-23 14:54:13,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:54:13,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:54:13,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:54:13,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:54:13,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:54:13,780 INFO L87 Difference]: Start difference. First operand 35368 states and 108635 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:54:15,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:54:15,632 INFO L93 Difference]: Finished difference Result 66415 states and 204565 transitions. [2022-11-23 14:54:15,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:54:15,632 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-23 14:54:15,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:54:15,949 INFO L225 Difference]: With dead ends: 66415 [2022-11-23 14:54:15,949 INFO L226 Difference]: Without dead ends: 66415 [2022-11-23 14:54:15,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-11-23 14:54:15,951 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 396 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:54:15,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 145 Invalid, 868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 857 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-23 14:54:16,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66415 states. [2022-11-23 14:54:17,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66415 to 45506. [2022-11-23 14:54:17,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45506 states, 44661 states have (on average 3.2050782561966815) internal successors, (143142), 45505 states have internal predecessors, (143142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:54:17,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45506 states to 45506 states and 143142 transitions. [2022-11-23 14:54:17,844 INFO L78 Accepts]: Start accepts. Automaton has 45506 states and 143142 transitions. Word has length 20 [2022-11-23 14:54:17,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:54:17,844 INFO L495 AbstractCegarLoop]: Abstraction has 45506 states and 143142 transitions. [2022-11-23 14:54:17,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:54:17,844 INFO L276 IsEmpty]: Start isEmpty. Operand 45506 states and 143142 transitions. [2022-11-23 14:54:17,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-23 14:54:17,845 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:54:17,846 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-23 14:54:17,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 14:54:17,846 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2022-11-23 14:54:17,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:54:17,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1428641198, now seen corresponding path program 1 times [2022-11-23 14:54:17,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:54:17,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254445191] [2022-11-23 14:54:17,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:54:17,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:54:17,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:54:17,924 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 14:54:17,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:54:17,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254445191] [2022-11-23 14:54:17,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254445191] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:54:17,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:54:17,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:54:17,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271853743] [2022-11-23 14:54:17,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:54:17,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:54:17,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:54:17,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:54:17,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:54:17,928 INFO L87 Difference]: Start difference. First operand 45506 states and 143142 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:54:18,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:54:18,325 INFO L93 Difference]: Finished difference Result 44636 states and 140230 transitions. [2022-11-23 14:54:18,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:54:18,325 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-23 14:54:18,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:54:18,483 INFO L225 Difference]: With dead ends: 44636 [2022-11-23 14:54:18,483 INFO L226 Difference]: Without dead ends: 44636 [2022-11-23 14:54:18,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:54:18,485 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 110 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:54:18,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 17 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:54:18,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44636 states. [2022-11-23 14:54:19,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44636 to 44636. [2022-11-23 14:54:19,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44636 states, 43840 states have (on average 3.19867700729927) internal successors, (140230), 44635 states have internal predecessors, (140230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:54:20,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44636 states to 44636 states and 140230 transitions. [2022-11-23 14:54:20,133 INFO L78 Accepts]: Start accepts. Automaton has 44636 states and 140230 transitions. Word has length 20 [2022-11-23 14:54:20,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:54:20,134 INFO L495 AbstractCegarLoop]: Abstraction has 44636 states and 140230 transitions. [2022-11-23 14:54:20,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:54:20,134 INFO L276 IsEmpty]: Start isEmpty. Operand 44636 states and 140230 transitions. [2022-11-23 14:54:20,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-23 14:54:20,135 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:54:20,135 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-23 14:54:20,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-23 14:54:20,136 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2022-11-23 14:54:20,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:54:20,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1428641117, now seen corresponding path program 1 times [2022-11-23 14:54:20,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:54:20,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170965207] [2022-11-23 14:54:20,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:54:20,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:54:20,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:54:20,198 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-23 14:54:20,199 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:54:20,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170965207] [2022-11-23 14:54:20,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170965207] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:54:20,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:54:20,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:54:20,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439309356] [2022-11-23 14:54:20,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:54:20,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:54:20,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:54:20,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:54:20,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:54:20,202 INFO L87 Difference]: Start difference. First operand 44636 states and 140230 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:54:21,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:54:21,303 INFO L93 Difference]: Finished difference Result 43766 states and 137318 transitions. [2022-11-23 14:54:21,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:54:21,303 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-23 14:54:21,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:54:21,538 INFO L225 Difference]: With dead ends: 43766 [2022-11-23 14:54:21,538 INFO L226 Difference]: Without dead ends: 43766 [2022-11-23 14:54:21,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:54:21,540 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 55 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:54:21,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 32 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:54:21,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43766 states. [2022-11-23 14:54:22,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43766 to 43766. [2022-11-23 14:54:22,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43766 states, 43019 states have (on average 3.192031427973686) internal successors, (137318), 43765 states have internal predecessors, (137318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:54:23,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43766 states to 43766 states and 137318 transitions. [2022-11-23 14:54:23,624 INFO L78 Accepts]: Start accepts. Automaton has 43766 states and 137318 transitions. Word has length 20 [2022-11-23 14:54:23,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:54:23,625 INFO L495 AbstractCegarLoop]: Abstraction has 43766 states and 137318 transitions. [2022-11-23 14:54:23,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:54:23,625 INFO L276 IsEmpty]: Start isEmpty. Operand 43766 states and 137318 transitions. [2022-11-23 14:54:23,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-23 14:54:23,627 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:54:23,627 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:54:23,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-23 14:54:23,627 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2022-11-23 14:54:23,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:54:23,630 INFO L85 PathProgramCache]: Analyzing trace with hash -188002271, now seen corresponding path program 1 times [2022-11-23 14:54:23,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:54:23,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485072328] [2022-11-23 14:54:23,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:54:23,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:54:23,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:54:23,733 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 14:54:23,734 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:54:23,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485072328] [2022-11-23 14:54:23,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485072328] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:54:23,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082107226] [2022-11-23 14:54:23,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:54:23,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:54:23,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873657d4-acad-4e74-9cbb-5b21bbc1369e/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:54:23,738 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873657d4-acad-4e74-9cbb-5b21bbc1369e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:54:23,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873657d4-acad-4e74-9cbb-5b21bbc1369e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 14:54:23,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:54:23,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:54:23,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:54:23,919 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 14:54:23,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:54:23,949 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-23 14:54:23,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082107226] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:54:23,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1840019860] [2022-11-23 14:54:23,953 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-23 14:54:23,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:54:23,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-23 14:54:23,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254927339] [2022-11-23 14:54:23,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:54:23,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:54:23,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:54:23,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:54:23,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:54:23,958 INFO L87 Difference]: Start difference. First operand 43766 states and 137318 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:54:24,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:54:24,211 INFO L93 Difference]: Finished difference Result 4993 states and 14540 transitions. [2022-11-23 14:54:24,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:54:24,212 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-23 14:54:24,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:54:24,231 INFO L225 Difference]: With dead ends: 4993 [2022-11-23 14:54:24,231 INFO L226 Difference]: Without dead ends: 4993 [2022-11-23 14:54:24,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:54:24,232 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 193 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:54:24,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 25 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:54:24,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4993 states. [2022-11-23 14:54:24,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4993 to 4513. [2022-11-23 14:54:24,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4513 states, 4464 states have (on average 2.9702060931899643) internal successors, (13259), 4512 states have internal predecessors, (13259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:54:24,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4513 states to 4513 states and 13259 transitions. [2022-11-23 14:54:24,365 INFO L78 Accepts]: Start accepts. Automaton has 4513 states and 13259 transitions. Word has length 22 [2022-11-23 14:54:24,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:54:24,367 INFO L495 AbstractCegarLoop]: Abstraction has 4513 states and 13259 transitions. [2022-11-23 14:54:24,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:54:24,368 INFO L276 IsEmpty]: Start isEmpty. Operand 4513 states and 13259 transitions. [2022-11-23 14:54:24,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-23 14:54:24,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:54:24,369 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2022-11-23 14:54:24,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873657d4-acad-4e74-9cbb-5b21bbc1369e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 14:54:24,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_873657d4-acad-4e74-9cbb-5b21bbc1369e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:54:24,587 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2022-11-23 14:54:24,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:54:24,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1465531280, now seen corresponding path program 1 times [2022-11-23 14:54:24,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:54:24,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717719159] [2022-11-23 14:54:24,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:54:24,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:54:24,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 14:54:24,634 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 14:54:24,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 14:54:24,675 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-23 14:54:24,675 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 14:54:24,676 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (34 of 35 remaining) [2022-11-23 14:54:24,676 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (33 of 35 remaining) [2022-11-23 14:54:24,677 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (32 of 35 remaining) [2022-11-23 14:54:24,677 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (31 of 35 remaining) [2022-11-23 14:54:24,677 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (30 of 35 remaining) [2022-11-23 14:54:24,677 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONINTEGER_OVERFLOW (29 of 35 remaining) [2022-11-23 14:54:24,678 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14ASSERT_VIOLATIONINTEGER_OVERFLOW (28 of 35 remaining) [2022-11-23 14:54:24,678 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONINTEGER_OVERFLOW (27 of 35 remaining) [2022-11-23 14:54:24,678 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11ASSERT_VIOLATIONINTEGER_OVERFLOW (26 of 35 remaining) [2022-11-23 14:54:24,678 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONINTEGER_OVERFLOW (25 of 35 remaining) [2022-11-23 14:54:24,679 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONINTEGER_OVERFLOW (24 of 35 remaining) [2022-11-23 14:54:24,679 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW (23 of 35 remaining) [2022-11-23 14:54:24,679 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13ASSERT_VIOLATIONINTEGER_OVERFLOW (22 of 35 remaining) [2022-11-23 14:54:24,679 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (21 of 35 remaining) [2022-11-23 14:54:24,679 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW (20 of 35 remaining) [2022-11-23 14:54:24,680 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (19 of 35 remaining) [2022-11-23 14:54:24,681 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW (18 of 35 remaining) [2022-11-23 14:54:24,681 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (17 of 35 remaining) [2022-11-23 14:54:24,681 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5ASSERT_VIOLATIONINTEGER_OVERFLOW (16 of 35 remaining) [2022-11-23 14:54:24,682 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 35 remaining) [2022-11-23 14:54:24,682 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 35 remaining) [2022-11-23 14:54:24,682 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 35 remaining) [2022-11-23 14:54:24,682 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 35 remaining) [2022-11-23 14:54:24,683 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 35 remaining) [2022-11-23 14:54:24,683 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 35 remaining) [2022-11-23 14:54:24,683 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 35 remaining) [2022-11-23 14:54:24,683 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 35 remaining) [2022-11-23 14:54:24,684 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 35 remaining) [2022-11-23 14:54:24,684 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 35 remaining) [2022-11-23 14:54:24,684 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 35 remaining) [2022-11-23 14:54:24,684 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 35 remaining) [2022-11-23 14:54:24,685 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 35 remaining) [2022-11-23 14:54:24,685 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 35 remaining) [2022-11-23 14:54:24,686 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 35 remaining) [2022-11-23 14:54:24,687 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 35 remaining) [2022-11-23 14:54:24,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-23 14:54:24,688 INFO L444 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:54:24,688 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-23 14:54:24,689 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-23 14:54:24,746 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-23 14:54:24,751 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 14:54:24,751 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 396 places, 464 transitions, 958 flow [2022-11-23 14:54:24,752 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 396 places, 464 transitions, 958 flow [2022-11-23 14:54:24,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 396 places, 464 transitions, 958 flow [2022-11-23 14:54:25,055 INFO L130 PetriNetUnfolder]: 168/1050 cut-off events. [2022-11-23 14:54:25,056 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-23 14:54:25,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1078 conditions, 1050 events. 168/1050 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 5982 event pairs, 1 based on Foata normal form. 0/798 useless extension candidates. Maximal degree in co-relation 739. Up to 16 conditions per place. [2022-11-23 14:54:25,171 INFO L119 LiptonReduction]: Number of co-enabled transitions 127920 [2022-11-23 14:54:34,843 INFO L134 LiptonReduction]: Checked pairs total: 219660 [2022-11-23 14:54:34,843 INFO L136 LiptonReduction]: Total number of compositions: 415 [2022-11-23 14:54:34,844 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 142 places, 199 transitions, 428 flow