./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/13-privatized_68-pfscan_protected_loop_minimal_interval_true.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc 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_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/13-privatized_68-pfscan_protected_loop_minimal_interval_true.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6aeaf730cbe4eb831d189bfd9925d1660c7714b9e685f389bc2495c0943d6472 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 16:35:02,740 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 16:35:02,806 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-12-02 16:35:02,811 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 16:35:02,812 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 16:35:02,837 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 16:35:02,838 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 16:35:02,839 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 16:35:02,839 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 16:35:02,840 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 16:35:02,840 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 16:35:02,841 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 16:35:02,841 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 16:35:02,842 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 16:35:02,842 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 16:35:02,843 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 16:35:02,843 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 16:35:02,844 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 16:35:02,844 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 16:35:02,845 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 16:35:02,845 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 16:35:02,846 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 16:35:02,847 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 16:35:02,847 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 16:35:02,848 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 16:35:02,848 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 16:35:02,849 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 16:35:02,849 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 16:35:02,849 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 16:35:02,850 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 16:35:02,850 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 16:35:02,851 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 16:35:02,851 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 16:35:02,851 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 16:35:02,851 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 16:35:02,852 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 16:35:02,852 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 16:35:02,852 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 16:35:02,852 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 16:35:02,853 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 16:35:02,853 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:35:02,853 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 16:35:02,853 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 16:35:02,854 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 16:35:02,854 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 16:35:02,854 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 16:35:02,854 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 16:35:02,854 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 16:35:02,855 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6aeaf730cbe4eb831d189bfd9925d1660c7714b9e685f389bc2495c0943d6472 [2023-12-02 16:35:03,075 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 16:35:03,095 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 16:35:03,098 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 16:35:03,099 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 16:35:03,100 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 16:35:03,101 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/goblint-regression/13-privatized_68-pfscan_protected_loop_minimal_interval_true.i [2023-12-02 16:35:05,777 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 16:35:06,011 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 16:35:06,012 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/sv-benchmarks/c/goblint-regression/13-privatized_68-pfscan_protected_loop_minimal_interval_true.i [2023-12-02 16:35:06,026 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/data/2eaf27537/a05eb27b06f74392ae20c2fcac693d88/FLAG10841a692 [2023-12-02 16:35:06,038 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/data/2eaf27537/a05eb27b06f74392ae20c2fcac693d88 [2023-12-02 16:35:06,040 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 16:35:06,041 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 16:35:06,043 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 16:35:06,043 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 16:35:06,048 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 16:35:06,049 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:35:06" (1/1) ... [2023-12-02 16:35:06,050 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52e1780d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:35:06, skipping insertion in model container [2023-12-02 16:35:06,050 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:35:06" (1/1) ... [2023-12-02 16:35:06,099 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 16:35:06,370 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:35:06,383 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 16:35:06,427 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:35:06,468 INFO L206 MainTranslator]: Completed translation [2023-12-02 16:35:06,469 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:35:06 WrapperNode [2023-12-02 16:35:06,469 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 16:35:06,470 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 16:35:06,470 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 16:35:06,470 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 16:35:06,478 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:35:06" (1/1) ... [2023-12-02 16:35:06,492 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:35:06" (1/1) ... [2023-12-02 16:35:06,519 INFO L138 Inliner]: procedures = 166, calls = 39, calls flagged for inlining = 8, calls inlined = 9, statements flattened = 131 [2023-12-02 16:35:06,519 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 16:35:06,520 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 16:35:06,520 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 16:35:06,520 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 16:35:06,530 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:35:06" (1/1) ... [2023-12-02 16:35:06,530 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:35:06" (1/1) ... [2023-12-02 16:35:06,534 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:35:06" (1/1) ... [2023-12-02 16:35:06,535 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:35:06" (1/1) ... [2023-12-02 16:35:06,543 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:35:06" (1/1) ... [2023-12-02 16:35:06,547 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:35:06" (1/1) ... [2023-12-02 16:35:06,550 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:35:06" (1/1) ... [2023-12-02 16:35:06,551 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:35:06" (1/1) ... [2023-12-02 16:35:06,555 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 16:35:06,556 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 16:35:06,556 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 16:35:06,556 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 16:35:06,557 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:35:06" (1/1) ... [2023-12-02 16:35:06,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:35:06,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:35:06,590 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 16:35:06,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 16:35:06,620 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 16:35:06,620 INFO L130 BoogieDeclarations]: Found specification of procedure worker [2023-12-02 16:35:06,620 INFO L138 BoogieDeclarations]: Found implementation of procedure worker [2023-12-02 16:35:06,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 16:35:06,621 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-12-02 16:35:06,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 16:35:06,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 16:35:06,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 16:35:06,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 16:35:06,622 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-12-02 16:35:06,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 16:35:06,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 16:35:06,624 WARN L213 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-12-02 16:35:06,747 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 16:35:06,749 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 16:35:07,001 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 16:35:07,127 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 16:35:07,127 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-02 16:35:07,127 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:35:07 BoogieIcfgContainer [2023-12-02 16:35:07,128 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 16:35:07,130 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 16:35:07,130 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 16:35:07,133 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 16:35:07,134 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 04:35:06" (1/3) ... [2023-12-02 16:35:07,134 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ead46d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:35:07, skipping insertion in model container [2023-12-02 16:35:07,134 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:35:06" (2/3) ... [2023-12-02 16:35:07,135 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ead46d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:35:07, skipping insertion in model container [2023-12-02 16:35:07,135 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:35:07" (3/3) ... [2023-12-02 16:35:07,136 INFO L112 eAbstractionObserver]: Analyzing ICFG 13-privatized_68-pfscan_protected_loop_minimal_interval_true.i [2023-12-02 16:35:07,154 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 16:35:07,155 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 25 error locations. [2023-12-02 16:35:07,155 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-02 16:35:07,206 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-02 16:35:07,235 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 72 places, 78 transitions, 160 flow [2023-12-02 16:35:07,300 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 805 states, 682 states have (on average 2.6055718475073313) internal successors, (1777), 804 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:07,317 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 16:35:07,324 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@130e1f52, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 16:35:07,325 INFO L358 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2023-12-02 16:35:07,329 INFO L276 IsEmpty]: Start isEmpty. Operand has 805 states, 682 states have (on average 2.6055718475073313) internal successors, (1777), 804 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:07,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-12-02 16:35:07,335 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:35:07,336 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-12-02 16:35:07,336 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-12-02 16:35:07,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:35:07,342 INFO L85 PathProgramCache]: Analyzing trace with hash 13828, now seen corresponding path program 1 times [2023-12-02 16:35:07,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:35:07,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848794282] [2023-12-02 16:35:07,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:35:07,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:35:07,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:35:07,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:35:07,666 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:35:07,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848794282] [2023-12-02 16:35:07,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848794282] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:35:07,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:35:07,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 16:35:07,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060600149] [2023-12-02 16:35:07,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:35:07,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:35:07,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:35:07,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:35:07,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:35:07,699 INFO L87 Difference]: Start difference. First operand has 805 states, 682 states have (on average 2.6055718475073313) internal successors, (1777), 804 states have internal predecessors, (1777), 0 states have call successors, (0), 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) [2023-12-02 16:35:07,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:35:07,813 INFO L93 Difference]: Finished difference Result 748 states and 1566 transitions. [2023-12-02 16:35:07,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:35:07,815 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 [2023-12-02 16:35:07,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:35:07,835 INFO L225 Difference]: With dead ends: 748 [2023-12-02 16:35:07,835 INFO L226 Difference]: Without dead ends: 748 [2023-12-02 16:35:07,837 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 [2023-12-02 16:35:07,841 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:35:07,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 57 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:35:07,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2023-12-02 16:35:07,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 748. [2023-12-02 16:35:07,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 633 states have (on average 2.4739336492890995) internal successors, (1566), 747 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:07,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1566 transitions. [2023-12-02 16:35:07,918 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1566 transitions. Word has length 2 [2023-12-02 16:35:07,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:35:07,919 INFO L495 AbstractCegarLoop]: Abstraction has 748 states and 1566 transitions. [2023-12-02 16:35:07,919 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) [2023-12-02 16:35:07,919 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1566 transitions. [2023-12-02 16:35:07,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-12-02 16:35:07,920 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:35:07,920 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-12-02 16:35:07,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 16:35:07,920 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-12-02 16:35:07,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:35:07,921 INFO L85 PathProgramCache]: Analyzing trace with hash 13829, now seen corresponding path program 1 times [2023-12-02 16:35:07,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:35:07,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310778154] [2023-12-02 16:35:07,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:35:07,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:35:07,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:35:08,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:35:08,042 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:35:08,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310778154] [2023-12-02 16:35:08,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310778154] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:35:08,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:35:08,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 16:35:08,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825500109] [2023-12-02 16:35:08,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:35:08,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:35:08,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:35:08,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:35:08,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:35:08,046 INFO L87 Difference]: Start difference. First operand 748 states and 1566 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) [2023-12-02 16:35:08,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:35:08,130 INFO L93 Difference]: Finished difference Result 747 states and 1565 transitions. [2023-12-02 16:35:08,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:35:08,131 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 [2023-12-02 16:35:08,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:35:08,137 INFO L225 Difference]: With dead ends: 747 [2023-12-02 16:35:08,137 INFO L226 Difference]: Without dead ends: 747 [2023-12-02 16:35:08,138 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 [2023-12-02 16:35:08,139 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:35:08,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 58 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:35:08,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2023-12-02 16:35:08,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 747. [2023-12-02 16:35:08,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 633 states have (on average 2.472353870458136) internal successors, (1565), 746 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:08,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 1565 transitions. [2023-12-02 16:35:08,169 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 1565 transitions. Word has length 2 [2023-12-02 16:35:08,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:35:08,169 INFO L495 AbstractCegarLoop]: Abstraction has 747 states and 1565 transitions. [2023-12-02 16:35:08,169 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) [2023-12-02 16:35:08,169 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 1565 transitions. [2023-12-02 16:35:08,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 16:35:08,170 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:35:08,170 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 16:35:08,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 16:35:08,170 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-12-02 16:35:08,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:35:08,171 INFO L85 PathProgramCache]: Analyzing trace with hash 429088, now seen corresponding path program 1 times [2023-12-02 16:35:08,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:35:08,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433589237] [2023-12-02 16:35:08,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:35:08,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:35:08,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:35:08,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:35:08,226 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:35:08,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433589237] [2023-12-02 16:35:08,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433589237] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:35:08,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:35:08,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 16:35:08,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815706608] [2023-12-02 16:35:08,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:35:08,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:35:08,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:35:08,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:35:08,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:35:08,228 INFO L87 Difference]: Start difference. First operand 747 states and 1565 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 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) [2023-12-02 16:35:08,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:35:08,324 INFO L93 Difference]: Finished difference Result 746 states and 1564 transitions. [2023-12-02 16:35:08,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:35:08,325 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 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 [2023-12-02 16:35:08,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:35:08,331 INFO L225 Difference]: With dead ends: 746 [2023-12-02 16:35:08,331 INFO L226 Difference]: Without dead ends: 746 [2023-12-02 16:35:08,331 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 [2023-12-02 16:35:08,333 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 61 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:35:08,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 37 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:35:08,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2023-12-02 16:35:08,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 746. [2023-12-02 16:35:08,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 633 states have (on average 2.470774091627172) internal successors, (1564), 745 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:08,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1564 transitions. [2023-12-02 16:35:08,360 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1564 transitions. Word has length 3 [2023-12-02 16:35:08,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:35:08,361 INFO L495 AbstractCegarLoop]: Abstraction has 746 states and 1564 transitions. [2023-12-02 16:35:08,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 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) [2023-12-02 16:35:08,361 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1564 transitions. [2023-12-02 16:35:08,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 16:35:08,361 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:35:08,361 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 16:35:08,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 16:35:08,362 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-12-02 16:35:08,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:35:08,362 INFO L85 PathProgramCache]: Analyzing trace with hash 429089, now seen corresponding path program 1 times [2023-12-02 16:35:08,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:35:08,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128136031] [2023-12-02 16:35:08,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:35:08,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:35:08,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:35:08,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:35:08,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:35:08,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128136031] [2023-12-02 16:35:08,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128136031] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:35:08,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:35:08,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 16:35:08,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285082693] [2023-12-02 16:35:08,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:35:08,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:35:08,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:35:08,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:35:08,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:35:08,440 INFO L87 Difference]: Start difference. First operand 746 states and 1564 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 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) [2023-12-02 16:35:08,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:35:08,562 INFO L93 Difference]: Finished difference Result 745 states and 1563 transitions. [2023-12-02 16:35:08,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:35:08,562 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 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 [2023-12-02 16:35:08,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:35:08,568 INFO L225 Difference]: With dead ends: 745 [2023-12-02 16:35:08,568 INFO L226 Difference]: Without dead ends: 745 [2023-12-02 16:35:08,569 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 [2023-12-02 16:35:08,570 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 60 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:35:08,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 38 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:35:08,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2023-12-02 16:35:08,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 745. [2023-12-02 16:35:08,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 633 states have (on average 2.4691943127962084) internal successors, (1563), 744 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:08,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1563 transitions. [2023-12-02 16:35:08,597 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1563 transitions. Word has length 3 [2023-12-02 16:35:08,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:35:08,597 INFO L495 AbstractCegarLoop]: Abstraction has 745 states and 1563 transitions. [2023-12-02 16:35:08,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 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) [2023-12-02 16:35:08,598 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1563 transitions. [2023-12-02 16:35:08,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 16:35:08,598 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:35:08,599 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:35:08,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 16:35:08,599 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-12-02 16:35:08,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:35:08,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1148584433, now seen corresponding path program 1 times [2023-12-02 16:35:08,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:35:08,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669845452] [2023-12-02 16:35:08,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:35:08,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:35:08,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:35:08,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:35:08,682 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:35:08,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669845452] [2023-12-02 16:35:08,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669845452] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:35:08,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:35:08,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 16:35:08,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072102499] [2023-12-02 16:35:08,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:35:08,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:35:08,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:35:08,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:35:08,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:35:08,684 INFO L87 Difference]: Start difference. First operand 745 states and 1563 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) 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) [2023-12-02 16:35:08,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:35:08,804 INFO L93 Difference]: Finished difference Result 706 states and 1483 transitions. [2023-12-02 16:35:08,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 16:35:08,804 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) 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 7 [2023-12-02 16:35:08,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:35:08,810 INFO L225 Difference]: With dead ends: 706 [2023-12-02 16:35:08,810 INFO L226 Difference]: Without dead ends: 706 [2023-12-02 16:35:08,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:35:08,811 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 99 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:35:08,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 72 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:35:08,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2023-12-02 16:35:08,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 706. [2023-12-02 16:35:08,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 608 states have (on average 2.4391447368421053) internal successors, (1483), 705 states have internal predecessors, (1483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:08,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 1483 transitions. [2023-12-02 16:35:08,836 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 1483 transitions. Word has length 7 [2023-12-02 16:35:08,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:35:08,837 INFO L495 AbstractCegarLoop]: Abstraction has 706 states and 1483 transitions. [2023-12-02 16:35:08,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) 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) [2023-12-02 16:35:08,837 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 1483 transitions. [2023-12-02 16:35:08,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 16:35:08,838 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:35:08,838 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:35:08,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 16:35:08,838 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting workerErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-12-02 16:35:08,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:35:08,839 INFO L85 PathProgramCache]: Analyzing trace with hash 48343569, now seen corresponding path program 1 times [2023-12-02 16:35:08,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:35:08,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924638069] [2023-12-02 16:35:08,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:35:08,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:35:08,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:35:08,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:35:08,921 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:35:08,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924638069] [2023-12-02 16:35:08,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924638069] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:35:08,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:35:08,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 16:35:08,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340678223] [2023-12-02 16:35:08,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:35:08,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:35:08,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:35:08,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:35:08,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:35:08,923 INFO L87 Difference]: Start difference. First operand 706 states and 1483 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:09,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:35:09,126 INFO L93 Difference]: Finished difference Result 668 states and 1370 transitions. [2023-12-02 16:35:09,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 16:35:09,127 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 [2023-12-02 16:35:09,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:35:09,132 INFO L225 Difference]: With dead ends: 668 [2023-12-02 16:35:09,132 INFO L226 Difference]: Without dead ends: 668 [2023-12-02 16:35:09,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:35:09,133 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 126 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:35:09,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 78 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:35:09,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2023-12-02 16:35:09,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 634. [2023-12-02 16:35:09,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 572 states have (on average 2.3339160839160837) internal successors, (1335), 633 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:09,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 1335 transitions. [2023-12-02 16:35:09,168 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 1335 transitions. Word has length 9 [2023-12-02 16:35:09,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:35:09,168 INFO L495 AbstractCegarLoop]: Abstraction has 634 states and 1335 transitions. [2023-12-02 16:35:09,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:09,169 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 1335 transitions. [2023-12-02 16:35:09,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 16:35:09,169 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:35:09,169 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:35:09,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 16:35:09,170 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting workerErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-12-02 16:35:09,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:35:09,171 INFO L85 PathProgramCache]: Analyzing trace with hash 48343570, now seen corresponding path program 1 times [2023-12-02 16:35:09,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:35:09,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033220685] [2023-12-02 16:35:09,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:35:09,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:35:09,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:35:09,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:35:09,339 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:35:09,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033220685] [2023-12-02 16:35:09,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033220685] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:35:09,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:35:09,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 16:35:09,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152762413] [2023-12-02 16:35:09,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:35:09,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:35:09,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:35:09,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:35:09,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:35:09,341 INFO L87 Difference]: Start difference. First operand 634 states and 1335 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:09,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:35:09,505 INFO L93 Difference]: Finished difference Result 526 states and 1101 transitions. [2023-12-02 16:35:09,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:35:09,506 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 [2023-12-02 16:35:09,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:35:09,510 INFO L225 Difference]: With dead ends: 526 [2023-12-02 16:35:09,510 INFO L226 Difference]: Without dead ends: 526 [2023-12-02 16:35:09,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:35:09,511 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 102 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:35:09,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 41 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:35:09,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2023-12-02 16:35:09,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 526. [2023-12-02 16:35:09,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 506 states have (on average 2.175889328063241) internal successors, (1101), 525 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:09,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 1101 transitions. [2023-12-02 16:35:09,530 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 1101 transitions. Word has length 9 [2023-12-02 16:35:09,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:35:09,530 INFO L495 AbstractCegarLoop]: Abstraction has 526 states and 1101 transitions. [2023-12-02 16:35:09,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:09,530 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 1101 transitions. [2023-12-02 16:35:09,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 16:35:09,531 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:35:09,531 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:35:09,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 16:35:09,531 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-12-02 16:35:09,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:35:09,532 INFO L85 PathProgramCache]: Analyzing trace with hash -16988191, now seen corresponding path program 1 times [2023-12-02 16:35:09,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:35:09,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027549681] [2023-12-02 16:35:09,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:35:09,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:35:09,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:35:09,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:35:09,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:35:09,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027549681] [2023-12-02 16:35:09,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027549681] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:35:09,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:35:09,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 16:35:09,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604136647] [2023-12-02 16:35:09,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:35:09,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:35:09,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:35:09,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:35:09,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:35:09,605 INFO L87 Difference]: Start difference. First operand 526 states and 1101 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:09,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:35:09,742 INFO L93 Difference]: Finished difference Result 445 states and 933 transitions. [2023-12-02 16:35:09,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:35:09,743 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 [2023-12-02 16:35:09,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:35:09,746 INFO L225 Difference]: With dead ends: 445 [2023-12-02 16:35:09,746 INFO L226 Difference]: Without dead ends: 445 [2023-12-02 16:35:09,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:35:09,747 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 80 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:35:09,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 74 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:35:09,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2023-12-02 16:35:09,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 445. [2023-12-02 16:35:09,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 431 states have (on average 2.1647331786542923) internal successors, (933), 444 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:09,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 933 transitions. [2023-12-02 16:35:09,763 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 933 transitions. Word has length 9 [2023-12-02 16:35:09,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:35:09,763 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 933 transitions. [2023-12-02 16:35:09,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:09,763 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 933 transitions. [2023-12-02 16:35:09,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 16:35:09,764 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:35:09,764 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:35:09,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 16:35:09,764 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-12-02 16:35:09,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:35:09,765 INFO L85 PathProgramCache]: Analyzing trace with hash -16988190, now seen corresponding path program 1 times [2023-12-02 16:35:09,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:35:09,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334810522] [2023-12-02 16:35:09,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:35:09,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:35:09,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:35:09,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:35:09,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:35:09,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334810522] [2023-12-02 16:35:09,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334810522] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:35:09,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:35:09,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 16:35:09,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789734745] [2023-12-02 16:35:09,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:35:09,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:35:09,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:35:09,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:35:09,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:35:09,894 INFO L87 Difference]: Start difference. First operand 445 states and 933 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:10,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:35:10,022 INFO L93 Difference]: Finished difference Result 364 states and 765 transitions. [2023-12-02 16:35:10,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:35:10,022 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 [2023-12-02 16:35:10,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:35:10,025 INFO L225 Difference]: With dead ends: 364 [2023-12-02 16:35:10,025 INFO L226 Difference]: Without dead ends: 364 [2023-12-02 16:35:10,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:35:10,026 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 82 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:35:10,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 70 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:35:10,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2023-12-02 16:35:10,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 364. [2023-12-02 16:35:10,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 356 states have (on average 2.148876404494382) internal successors, (765), 363 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:10,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 765 transitions. [2023-12-02 16:35:10,038 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 765 transitions. Word has length 9 [2023-12-02 16:35:10,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:35:10,038 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 765 transitions. [2023-12-02 16:35:10,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:10,038 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 765 transitions. [2023-12-02 16:35:10,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-02 16:35:10,039 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:35:10,039 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:35:10,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 16:35:10,039 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting workerErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-12-02 16:35:10,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:35:10,040 INFO L85 PathProgramCache]: Analyzing trace with hash -786530273, now seen corresponding path program 1 times [2023-12-02 16:35:10,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:35:10,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812145496] [2023-12-02 16:35:10,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:35:10,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:35:10,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:35:10,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:35:10,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:35:10,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812145496] [2023-12-02 16:35:10,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812145496] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:35:10,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:35:10,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 16:35:10,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523824824] [2023-12-02 16:35:10,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:35:10,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 16:35:10,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:35:10,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 16:35:10,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:35:10,189 INFO L87 Difference]: Start difference. First operand 364 states and 765 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) [2023-12-02 16:35:10,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:35:10,346 INFO L93 Difference]: Finished difference Result 360 states and 759 transitions. [2023-12-02 16:35:10,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 16:35:10,346 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 11 [2023-12-02 16:35:10,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:35:10,349 INFO L225 Difference]: With dead ends: 360 [2023-12-02 16:35:10,349 INFO L226 Difference]: Without dead ends: 360 [2023-12-02 16:35:10,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-12-02 16:35:10,350 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 100 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:35:10,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 50 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:35:10,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2023-12-02 16:35:10,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 336. [2023-12-02 16:35:10,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 333 states have (on average 2.1471471471471473) internal successors, (715), 335 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:10,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 715 transitions. [2023-12-02 16:35:10,361 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 715 transitions. Word has length 11 [2023-12-02 16:35:10,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:35:10,361 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 715 transitions. [2023-12-02 16:35:10,361 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) [2023-12-02 16:35:10,362 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 715 transitions. [2023-12-02 16:35:10,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-02 16:35:10,362 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:35:10,362 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:35:10,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-02 16:35:10,363 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting workerErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-12-02 16:35:10,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:35:10,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1454507843, now seen corresponding path program 2 times [2023-12-02 16:35:10,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:35:10,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106287296] [2023-12-02 16:35:10,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:35:10,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:35:10,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:35:10,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:35:10,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:35:10,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106287296] [2023-12-02 16:35:10,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106287296] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:35:10,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:35:10,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 16:35:10,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448131764] [2023-12-02 16:35:10,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:35:10,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 16:35:10,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:35:10,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 16:35:10,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:35:10,496 INFO L87 Difference]: Start difference. First operand 336 states and 715 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) [2023-12-02 16:35:10,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:35:10,648 INFO L93 Difference]: Finished difference Result 380 states and 785 transitions. [2023-12-02 16:35:10,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 16:35:10,649 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 11 [2023-12-02 16:35:10,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:35:10,651 INFO L225 Difference]: With dead ends: 380 [2023-12-02 16:35:10,651 INFO L226 Difference]: Without dead ends: 380 [2023-12-02 16:35:10,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-12-02 16:35:10,652 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 178 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:35:10,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 49 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:35:10,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2023-12-02 16:35:10,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 328. [2023-12-02 16:35:10,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 326 states have (on average 2.1564417177914113) internal successors, (703), 327 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:10,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 703 transitions. [2023-12-02 16:35:10,663 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 703 transitions. Word has length 11 [2023-12-02 16:35:10,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:35:10,663 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 703 transitions. [2023-12-02 16:35:10,663 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) [2023-12-02 16:35:10,663 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 703 transitions. [2023-12-02 16:35:10,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-02 16:35:10,665 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:35:10,665 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:35:10,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 16:35:10,665 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting workerErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-12-02 16:35:10,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:35:10,665 INFO L85 PathProgramCache]: Analyzing trace with hash -302139274, now seen corresponding path program 1 times [2023-12-02 16:35:10,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:35:10,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433297594] [2023-12-02 16:35:10,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:35:10,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:35:10,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:35:10,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:35:10,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:35:10,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433297594] [2023-12-02 16:35:10,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433297594] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:35:10,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:35:10,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 16:35:10,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214135500] [2023-12-02 16:35:10,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:35:10,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:35:10,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:35:10,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:35:10,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:35:10,755 INFO L87 Difference]: Start difference. First operand 328 states and 703 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:10,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:35:10,932 INFO L93 Difference]: Finished difference Result 458 states and 997 transitions. [2023-12-02 16:35:10,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 16:35:10,933 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 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 [2023-12-02 16:35:10,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:35:10,936 INFO L225 Difference]: With dead ends: 458 [2023-12-02 16:35:10,936 INFO L226 Difference]: Without dead ends: 458 [2023-12-02 16:35:10,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:35:10,937 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 61 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:35:10,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 54 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:35:10,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2023-12-02 16:35:10,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 358. [2023-12-02 16:35:10,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 356 states have (on average 2.182584269662921) internal successors, (777), 357 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:10,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 777 transitions. [2023-12-02 16:35:10,949 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 777 transitions. Word has length 14 [2023-12-02 16:35:10,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:35:10,950 INFO L495 AbstractCegarLoop]: Abstraction has 358 states and 777 transitions. [2023-12-02 16:35:10,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:10,950 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 777 transitions. [2023-12-02 16:35:10,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-02 16:35:10,951 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:35:10,951 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:35:10,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-02 16:35:10,951 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting workerErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-12-02 16:35:10,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:35:10,951 INFO L85 PathProgramCache]: Analyzing trace with hash -301124362, now seen corresponding path program 1 times [2023-12-02 16:35:10,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:35:10,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813948919] [2023-12-02 16:35:10,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:35:10,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:35:10,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:35:11,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:35:11,145 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:35:11,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813948919] [2023-12-02 16:35:11,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813948919] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:35:11,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:35:11,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 16:35:11,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054116825] [2023-12-02 16:35:11,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:35:11,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 16:35:11,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:35:11,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 16:35:11,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:35:11,147 INFO L87 Difference]: Start difference. First operand 358 states and 777 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:11,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:35:11,410 INFO L93 Difference]: Finished difference Result 596 states and 1297 transitions. [2023-12-02 16:35:11,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 16:35:11,411 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 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 [2023-12-02 16:35:11,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:35:11,415 INFO L225 Difference]: With dead ends: 596 [2023-12-02 16:35:11,415 INFO L226 Difference]: Without dead ends: 596 [2023-12-02 16:35:11,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-12-02 16:35:11,416 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 148 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:35:11,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 60 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:35:11,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2023-12-02 16:35:11,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 572. [2023-12-02 16:35:11,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 570 states have (on average 2.187719298245614) internal successors, (1247), 571 states have internal predecessors, (1247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:11,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1247 transitions. [2023-12-02 16:35:11,434 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1247 transitions. Word has length 14 [2023-12-02 16:35:11,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:35:11,435 INFO L495 AbstractCegarLoop]: Abstraction has 572 states and 1247 transitions. [2023-12-02 16:35:11,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:11,435 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1247 transitions. [2023-12-02 16:35:11,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 16:35:11,436 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:35:11,437 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:35:11,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-02 16:35:11,437 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting workerErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-12-02 16:35:11,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:35:11,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1478637097, now seen corresponding path program 1 times [2023-12-02 16:35:11,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:35:11,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825093211] [2023-12-02 16:35:11,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:35:11,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:35:11,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:35:11,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:35:11,813 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:35:11,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825093211] [2023-12-02 16:35:11,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825093211] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:35:11,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:35:11,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-12-02 16:35:11,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193378913] [2023-12-02 16:35:11,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:35:11,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 16:35:11,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:35:11,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 16:35:11,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-12-02 16:35:11,815 INFO L87 Difference]: Start difference. First operand 572 states and 1247 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 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) [2023-12-02 16:35:12,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:35:12,412 INFO L93 Difference]: Finished difference Result 863 states and 1887 transitions. [2023-12-02 16:35:12,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 16:35:12,413 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 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 22 [2023-12-02 16:35:12,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:35:12,419 INFO L225 Difference]: With dead ends: 863 [2023-12-02 16:35:12,419 INFO L226 Difference]: Without dead ends: 863 [2023-12-02 16:35:12,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2023-12-02 16:35:12,420 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 157 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 16:35:12,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 128 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 16:35:12,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2023-12-02 16:35:12,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 584. [2023-12-02 16:35:12,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 582 states have (on average 2.1872852233676974) internal successors, (1273), 583 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:12,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 1273 transitions. [2023-12-02 16:35:12,440 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 1273 transitions. Word has length 22 [2023-12-02 16:35:12,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:35:12,441 INFO L495 AbstractCegarLoop]: Abstraction has 584 states and 1273 transitions. [2023-12-02 16:35:12,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 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) [2023-12-02 16:35:12,441 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 1273 transitions. [2023-12-02 16:35:12,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 16:35:12,442 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:35:12,442 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:35:12,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-02 16:35:12,443 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting workerErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-12-02 16:35:12,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:35:12,443 INFO L85 PathProgramCache]: Analyzing trace with hash 624445193, now seen corresponding path program 1 times [2023-12-02 16:35:12,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:35:12,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449780231] [2023-12-02 16:35:12,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:35:12,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:35:12,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:35:12,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:35:12,663 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:35:12,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449780231] [2023-12-02 16:35:12,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449780231] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:35:12,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:35:12,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 16:35:12,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300465301] [2023-12-02 16:35:12,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:35:12,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 16:35:12,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:35:12,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 16:35:12,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:35:12,664 INFO L87 Difference]: Start difference. First operand 584 states and 1273 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 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) [2023-12-02 16:35:12,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:35:12,832 INFO L93 Difference]: Finished difference Result 953 states and 2058 transitions. [2023-12-02 16:35:12,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 16:35:12,833 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 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 22 [2023-12-02 16:35:12,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:35:12,839 INFO L225 Difference]: With dead ends: 953 [2023-12-02 16:35:12,839 INFO L226 Difference]: Without dead ends: 953 [2023-12-02 16:35:12,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:35:12,840 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 118 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:35:12,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 51 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:35:12,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2023-12-02 16:35:12,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 674. [2023-12-02 16:35:12,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 671 states have (on average 2.1833084947839048) internal successors, (1465), 673 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:12,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 1465 transitions. [2023-12-02 16:35:12,863 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 1465 transitions. Word has length 22 [2023-12-02 16:35:12,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:35:12,864 INFO L495 AbstractCegarLoop]: Abstraction has 674 states and 1465 transitions. [2023-12-02 16:35:12,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 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) [2023-12-02 16:35:12,864 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 1465 transitions. [2023-12-02 16:35:12,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 16:35:12,866 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:35:12,866 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:35:12,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-02 16:35:12,866 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting workerErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-12-02 16:35:12,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:35:12,867 INFO L85 PathProgramCache]: Analyzing trace with hash -319314817, now seen corresponding path program 2 times [2023-12-02 16:35:12,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:35:12,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42377835] [2023-12-02 16:35:12,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:35:12,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:35:12,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:35:13,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:35:13,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:35:13,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42377835] [2023-12-02 16:35:13,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42377835] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:35:13,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:35:13,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-12-02 16:35:13,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340154305] [2023-12-02 16:35:13,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:35:13,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 16:35:13,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:35:13,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 16:35:13,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-12-02 16:35:13,214 INFO L87 Difference]: Start difference. First operand 674 states and 1465 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2023-12-02 16:35:14,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:35:14,143 INFO L93 Difference]: Finished difference Result 1708 states and 3783 transitions. [2023-12-02 16:35:14,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-02 16:35:14,144 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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 22 [2023-12-02 16:35:14,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:35:14,155 INFO L225 Difference]: With dead ends: 1708 [2023-12-02 16:35:14,155 INFO L226 Difference]: Without dead ends: 1708 [2023-12-02 16:35:14,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=213, Invalid=657, Unknown=0, NotChecked=0, Total=870 [2023-12-02 16:35:14,156 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 217 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 16:35:14,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 211 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 963 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 16:35:14,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1708 states. [2023-12-02 16:35:14,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1708 to 779. [2023-12-02 16:35:14,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 776 states have (on average 2.2216494845360826) internal successors, (1724), 778 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:14,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 1724 transitions. [2023-12-02 16:35:14,190 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 1724 transitions. Word has length 22 [2023-12-02 16:35:14,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:35:14,190 INFO L495 AbstractCegarLoop]: Abstraction has 779 states and 1724 transitions. [2023-12-02 16:35:14,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2023-12-02 16:35:14,190 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 1724 transitions. [2023-12-02 16:35:14,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 16:35:14,192 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:35:14,192 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:35:14,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-12-02 16:35:14,192 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting workerErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-12-02 16:35:14,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:35:14,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1423586909, now seen corresponding path program 2 times [2023-12-02 16:35:14,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:35:14,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565454239] [2023-12-02 16:35:14,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:35:14,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:35:14,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:35:14,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:35:14,533 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:35:14,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565454239] [2023-12-02 16:35:14,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565454239] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:35:14,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:35:14,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 16:35:14,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127090254] [2023-12-02 16:35:14,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:35:14,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 16:35:14,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:35:14,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 16:35:14,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-12-02 16:35:14,534 INFO L87 Difference]: Start difference. First operand 779 states and 1724 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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) [2023-12-02 16:35:14,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:35:14,887 INFO L93 Difference]: Finished difference Result 1415 states and 3071 transitions. [2023-12-02 16:35:14,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 16:35:14,888 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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 22 [2023-12-02 16:35:14,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:35:14,897 INFO L225 Difference]: With dead ends: 1415 [2023-12-02 16:35:14,897 INFO L226 Difference]: Without dead ends: 1415 [2023-12-02 16:35:14,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2023-12-02 16:35:14,898 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 206 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 16:35:14,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 90 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 16:35:14,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2023-12-02 16:35:14,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 889. [2023-12-02 16:35:14,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 885 states have (on average 2.166101694915254) internal successors, (1917), 888 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:14,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 1917 transitions. [2023-12-02 16:35:14,931 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 1917 transitions. Word has length 22 [2023-12-02 16:35:14,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:35:14,931 INFO L495 AbstractCegarLoop]: Abstraction has 889 states and 1917 transitions. [2023-12-02 16:35:14,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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) [2023-12-02 16:35:14,932 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 1917 transitions. [2023-12-02 16:35:14,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 16:35:14,933 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:35:14,933 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:35:14,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-12-02 16:35:14,933 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting workerErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-12-02 16:35:14,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:35:14,934 INFO L85 PathProgramCache]: Analyzing trace with hash -2048007937, now seen corresponding path program 3 times [2023-12-02 16:35:14,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:35:14,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615264875] [2023-12-02 16:35:14,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:35:14,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:35:14,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:35:15,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:35:15,120 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:35:15,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615264875] [2023-12-02 16:35:15,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615264875] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:35:15,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:35:15,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 16:35:15,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999386847] [2023-12-02 16:35:15,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:35:15,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 16:35:15,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:35:15,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 16:35:15,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:35:15,122 INFO L87 Difference]: Start difference. First operand 889 states and 1917 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 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) [2023-12-02 16:35:15,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:35:15,295 INFO L93 Difference]: Finished difference Result 1111 states and 2399 transitions. [2023-12-02 16:35:15,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 16:35:15,295 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 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 22 [2023-12-02 16:35:15,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:35:15,302 INFO L225 Difference]: With dead ends: 1111 [2023-12-02 16:35:15,303 INFO L226 Difference]: Without dead ends: 1111 [2023-12-02 16:35:15,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-12-02 16:35:15,303 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 158 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:35:15,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 57 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:35:15,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2023-12-02 16:35:15,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 781. [2023-12-02 16:35:15,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 778 states have (on average 2.2082262210796917) internal successors, (1718), 780 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:15,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 1718 transitions. [2023-12-02 16:35:15,329 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 1718 transitions. Word has length 22 [2023-12-02 16:35:15,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:35:15,330 INFO L495 AbstractCegarLoop]: Abstraction has 781 states and 1718 transitions. [2023-12-02 16:35:15,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 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) [2023-12-02 16:35:15,330 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 1718 transitions. [2023-12-02 16:35:15,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 16:35:15,331 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:35:15,331 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:35:15,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-12-02 16:35:15,332 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting workerErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-12-02 16:35:15,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:35:15,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1939975037, now seen corresponding path program 3 times [2023-12-02 16:35:15,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:35:15,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839412459] [2023-12-02 16:35:15,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:35:15,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:35:15,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:35:15,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:35:15,595 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:35:15,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839412459] [2023-12-02 16:35:15,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839412459] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:35:15,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:35:15,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-02 16:35:15,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624261323] [2023-12-02 16:35:15,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:35:15,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 16:35:15,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:35:15,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 16:35:15,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-12-02 16:35:15,597 INFO L87 Difference]: Start difference. First operand 781 states and 1718 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 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) [2023-12-02 16:35:16,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:35:16,264 INFO L93 Difference]: Finished difference Result 1392 states and 3041 transitions. [2023-12-02 16:35:16,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-02 16:35:16,264 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 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 22 [2023-12-02 16:35:16,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:35:16,274 INFO L225 Difference]: With dead ends: 1392 [2023-12-02 16:35:16,274 INFO L226 Difference]: Without dead ends: 1392 [2023-12-02 16:35:16,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2023-12-02 16:35:16,275 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 172 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 16:35:16,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 211 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 16:35:16,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1392 states. [2023-12-02 16:35:16,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1392 to 757. [2023-12-02 16:35:16,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 754 states have (on average 2.1909814323607426) internal successors, (1652), 756 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:16,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 1652 transitions. [2023-12-02 16:35:16,303 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 1652 transitions. Word has length 22 [2023-12-02 16:35:16,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:35:16,304 INFO L495 AbstractCegarLoop]: Abstraction has 757 states and 1652 transitions. [2023-12-02 16:35:16,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 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) [2023-12-02 16:35:16,304 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 1652 transitions. [2023-12-02 16:35:16,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 16:35:16,305 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:35:16,305 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:35:16,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-12-02 16:35:16,306 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting workerErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-12-02 16:35:16,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:35:16,306 INFO L85 PathProgramCache]: Analyzing trace with hash -612090533, now seen corresponding path program 4 times [2023-12-02 16:35:16,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:35:16,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063800974] [2023-12-02 16:35:16,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:35:16,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:35:16,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:35:16,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:35:16,471 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:35:16,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063800974] [2023-12-02 16:35:16,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063800974] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:35:16,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:35:16,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 16:35:16,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045262840] [2023-12-02 16:35:16,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:35:16,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 16:35:16,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:35:16,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 16:35:16,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:35:16,473 INFO L87 Difference]: Start difference. First operand 757 states and 1652 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 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) [2023-12-02 16:35:16,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:35:16,650 INFO L93 Difference]: Finished difference Result 1093 states and 2353 transitions. [2023-12-02 16:35:16,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 16:35:16,650 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 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 22 [2023-12-02 16:35:16,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:35:16,657 INFO L225 Difference]: With dead ends: 1093 [2023-12-02 16:35:16,657 INFO L226 Difference]: Without dead ends: 1093 [2023-12-02 16:35:16,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-12-02 16:35:16,658 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 165 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:35:16,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 73 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:35:16,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2023-12-02 16:35:16,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 743. [2023-12-02 16:35:16,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 740 states have (on average 2.1905405405405407) internal successors, (1621), 742 states have internal predecessors, (1621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:16,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1621 transitions. [2023-12-02 16:35:16,682 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1621 transitions. Word has length 22 [2023-12-02 16:35:16,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:35:16,683 INFO L495 AbstractCegarLoop]: Abstraction has 743 states and 1621 transitions. [2023-12-02 16:35:16,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 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) [2023-12-02 16:35:16,683 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1621 transitions. [2023-12-02 16:35:16,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 16:35:16,684 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:35:16,684 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:35:16,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-12-02 16:35:16,685 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting workerErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-12-02 16:35:16,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:35:16,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1960621475, now seen corresponding path program 5 times [2023-12-02 16:35:16,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:35:16,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161382337] [2023-12-02 16:35:16,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:35:16,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:35:16,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:35:16,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:35:16,981 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:35:16,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161382337] [2023-12-02 16:35:16,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161382337] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:35:16,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:35:16,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 16:35:16,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469522114] [2023-12-02 16:35:16,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:35:16,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 16:35:16,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:35:16,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 16:35:16,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-12-02 16:35:16,984 INFO L87 Difference]: Start difference. First operand 743 states and 1621 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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) [2023-12-02 16:35:17,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:35:17,357 INFO L93 Difference]: Finished difference Result 1722 states and 3667 transitions. [2023-12-02 16:35:17,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 16:35:17,358 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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 22 [2023-12-02 16:35:17,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:35:17,367 INFO L225 Difference]: With dead ends: 1722 [2023-12-02 16:35:17,367 INFO L226 Difference]: Without dead ends: 1429 [2023-12-02 16:35:17,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2023-12-02 16:35:17,368 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 311 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 16:35:17,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 118 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 16:35:17,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1429 states. [2023-12-02 16:35:17,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1429 to 971. [2023-12-02 16:35:17,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 968 states have (on average 2.152892561983471) internal successors, (2084), 970 states have internal predecessors, (2084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:17,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 2084 transitions. [2023-12-02 16:35:17,402 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 2084 transitions. Word has length 22 [2023-12-02 16:35:17,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:35:17,402 INFO L495 AbstractCegarLoop]: Abstraction has 971 states and 2084 transitions. [2023-12-02 16:35:17,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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) [2023-12-02 16:35:17,402 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 2084 transitions. [2023-12-02 16:35:17,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 16:35:17,404 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:35:17,404 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:35:17,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-12-02 16:35:17,404 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting workerErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-12-02 16:35:17,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:35:17,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1576424593, now seen corresponding path program 6 times [2023-12-02 16:35:17,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:35:17,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847315462] [2023-12-02 16:35:17,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:35:17,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:35:17,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:35:17,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:35:17,765 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:35:17,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847315462] [2023-12-02 16:35:17,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847315462] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:35:17,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:35:17,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-12-02 16:35:17,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189101143] [2023-12-02 16:35:17,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:35:17,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 16:35:17,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:35:17,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 16:35:17,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-12-02 16:35:17,766 INFO L87 Difference]: Start difference. First operand 971 states and 2084 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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) [2023-12-02 16:35:18,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:35:18,455 INFO L93 Difference]: Finished difference Result 1735 states and 3683 transitions. [2023-12-02 16:35:18,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 16:35:18,455 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 22 [2023-12-02 16:35:18,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:35:18,467 INFO L225 Difference]: With dead ends: 1735 [2023-12-02 16:35:18,467 INFO L226 Difference]: Without dead ends: 1735 [2023-12-02 16:35:18,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2023-12-02 16:35:18,468 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 300 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 16:35:18,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 275 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 949 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 16:35:18,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1735 states. [2023-12-02 16:35:18,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1735 to 1179. [2023-12-02 16:35:18,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1179 states, 1176 states have (on average 2.1479591836734695) internal successors, (2526), 1178 states have internal predecessors, (2526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:18,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1179 states to 1179 states and 2526 transitions. [2023-12-02 16:35:18,518 INFO L78 Accepts]: Start accepts. Automaton has 1179 states and 2526 transitions. Word has length 22 [2023-12-02 16:35:18,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:35:18,518 INFO L495 AbstractCegarLoop]: Abstraction has 1179 states and 2526 transitions. [2023-12-02 16:35:18,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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) [2023-12-02 16:35:18,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1179 states and 2526 transitions. [2023-12-02 16:35:18,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 16:35:18,520 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:35:18,520 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:35:18,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-12-02 16:35:18,521 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting workerErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-12-02 16:35:18,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:35:18,521 INFO L85 PathProgramCache]: Analyzing trace with hash -907058405, now seen corresponding path program 7 times [2023-12-02 16:35:18,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:35:18,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229918508] [2023-12-02 16:35:18,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:35:18,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:35:18,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:35:18,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:35:18,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:35:18,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229918508] [2023-12-02 16:35:18,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229918508] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:35:18,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:35:18,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-12-02 16:35:18,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345224646] [2023-12-02 16:35:18,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:35:18,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 16:35:18,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:35:18,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 16:35:18,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-12-02 16:35:18,829 INFO L87 Difference]: Start difference. First operand 1179 states and 2526 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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) [2023-12-02 16:35:19,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:35:19,593 INFO L93 Difference]: Finished difference Result 1388 states and 2829 transitions. [2023-12-02 16:35:19,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-02 16:35:19,594 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 22 [2023-12-02 16:35:19,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:35:19,600 INFO L225 Difference]: With dead ends: 1388 [2023-12-02 16:35:19,600 INFO L226 Difference]: Without dead ends: 1388 [2023-12-02 16:35:19,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2023-12-02 16:35:19,601 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 317 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 16:35:19,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 314 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1020 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 16:35:19,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2023-12-02 16:35:19,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 860. [2023-12-02 16:35:19,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 857 states have (on average 2.0653442240373394) internal successors, (1770), 859 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:19,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1770 transitions. [2023-12-02 16:35:19,627 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1770 transitions. Word has length 22 [2023-12-02 16:35:19,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:35:19,628 INFO L495 AbstractCegarLoop]: Abstraction has 860 states and 1770 transitions. [2023-12-02 16:35:19,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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) [2023-12-02 16:35:19,628 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1770 transitions. [2023-12-02 16:35:19,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 16:35:19,629 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:35:19,629 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:35:19,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-12-02 16:35:19,629 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting workerErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-12-02 16:35:19,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:35:19,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1218106147, now seen corresponding path program 8 times [2023-12-02 16:35:19,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:35:19,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095653372] [2023-12-02 16:35:19,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:35:19,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:35:19,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:35:19,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:35:19,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:35:19,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095653372] [2023-12-02 16:35:19,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095653372] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:35:19,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:35:19,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-12-02 16:35:19,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618222263] [2023-12-02 16:35:19,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:35:19,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 16:35:19,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:35:19,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 16:35:19,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-12-02 16:35:19,875 INFO L87 Difference]: Start difference. First operand 860 states and 1770 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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) [2023-12-02 16:35:20,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:35:20,791 INFO L93 Difference]: Finished difference Result 1759 states and 3666 transitions. [2023-12-02 16:35:20,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 16:35:20,791 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 22 [2023-12-02 16:35:20,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:35:20,797 INFO L225 Difference]: With dead ends: 1759 [2023-12-02 16:35:20,798 INFO L226 Difference]: Without dead ends: 1759 [2023-12-02 16:35:20,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2023-12-02 16:35:20,799 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 309 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 1352 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 1359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 16:35:20,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 447 Invalid, 1359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1352 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 16:35:20,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1759 states. [2023-12-02 16:35:20,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1759 to 1341. [2023-12-02 16:35:20,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1338 states have (on average 2.1136023916292976) internal successors, (2828), 1340 states have internal predecessors, (2828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:20,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 2828 transitions. [2023-12-02 16:35:20,839 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 2828 transitions. Word has length 22 [2023-12-02 16:35:20,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:35:20,840 INFO L495 AbstractCegarLoop]: Abstraction has 1341 states and 2828 transitions. [2023-12-02 16:35:20,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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) [2023-12-02 16:35:20,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 2828 transitions. [2023-12-02 16:35:20,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-02 16:35:20,841 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:35:20,841 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:35:20,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-12-02 16:35:20,842 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting workerErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-12-02 16:35:20,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:35:20,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1712400493, now seen corresponding path program 1 times [2023-12-02 16:35:20,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:35:20,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47091508] [2023-12-02 16:35:20,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:35:20,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:35:20,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:35:21,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:35:21,158 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:35:21,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47091508] [2023-12-02 16:35:21,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47091508] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:35:21,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:35:21,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-12-02 16:35:21,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339873154] [2023-12-02 16:35:21,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:35:21,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 16:35:21,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:35:21,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 16:35:21,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-12-02 16:35:21,160 INFO L87 Difference]: Start difference. First operand 1341 states and 2828 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:21,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:35:21,662 INFO L93 Difference]: Finished difference Result 1492 states and 3099 transitions. [2023-12-02 16:35:21,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 16:35:21,662 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2023-12-02 16:35:21,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:35:21,666 INFO L225 Difference]: With dead ends: 1492 [2023-12-02 16:35:21,666 INFO L226 Difference]: Without dead ends: 1492 [2023-12-02 16:35:21,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2023-12-02 16:35:21,667 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 201 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 16:35:21,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 188 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 16:35:21,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2023-12-02 16:35:21,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 1337. [2023-12-02 16:35:21,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1337 states, 1334 states have (on average 2.116191904047976) internal successors, (2823), 1336 states have internal predecessors, (2823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:21,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 2823 transitions. [2023-12-02 16:35:21,703 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 2823 transitions. Word has length 23 [2023-12-02 16:35:21,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:35:21,704 INFO L495 AbstractCegarLoop]: Abstraction has 1337 states and 2823 transitions. [2023-12-02 16:35:21,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:21,704 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 2823 transitions. [2023-12-02 16:35:21,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 16:35:21,706 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:35:21,706 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:35:21,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-12-02 16:35:21,706 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting workerErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-12-02 16:35:21,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:35:21,707 INFO L85 PathProgramCache]: Analyzing trace with hash -723915765, now seen corresponding path program 1 times [2023-12-02 16:35:21,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:35:21,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419594228] [2023-12-02 16:35:21,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:35:21,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:35:21,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:35:21,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:35:21,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:35:21,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419594228] [2023-12-02 16:35:21,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419594228] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:35:21,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:35:21,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 16:35:21,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345860341] [2023-12-02 16:35:21,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:35:21,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 16:35:21,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:35:21,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 16:35:21,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:35:21,833 INFO L87 Difference]: Start difference. First operand 1337 states and 2823 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:22,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:35:22,010 INFO L93 Difference]: Finished difference Result 1209 states and 2571 transitions. [2023-12-02 16:35:22,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 16:35:22,010 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 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 29 [2023-12-02 16:35:22,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:35:22,012 INFO L225 Difference]: With dead ends: 1209 [2023-12-02 16:35:22,012 INFO L226 Difference]: Without dead ends: 1143 [2023-12-02 16:35:22,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-12-02 16:35:22,013 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 67 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:35:22,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 66 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:35:22,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2023-12-02 16:35:22,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 1143. [2023-12-02 16:35:22,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1143 states, 1140 states have (on average 2.1535087719298245) internal successors, (2455), 1142 states have internal predecessors, (2455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:22,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1143 states to 1143 states and 2455 transitions. [2023-12-02 16:35:22,034 INFO L78 Accepts]: Start accepts. Automaton has 1143 states and 2455 transitions. Word has length 29 [2023-12-02 16:35:22,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:35:22,034 INFO L495 AbstractCegarLoop]: Abstraction has 1143 states and 2455 transitions. [2023-12-02 16:35:22,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:22,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1143 states and 2455 transitions. [2023-12-02 16:35:22,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-02 16:35:22,035 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:35:22,035 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:35:22,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-12-02 16:35:22,036 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting workerErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-12-02 16:35:22,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:35:22,036 INFO L85 PathProgramCache]: Analyzing trace with hash 100137020, now seen corresponding path program 1 times [2023-12-02 16:35:22,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:35:22,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091105153] [2023-12-02 16:35:22,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:35:22,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:35:22,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:35:22,328 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:35:22,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:35:22,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091105153] [2023-12-02 16:35:22,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091105153] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:35:22,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994685632] [2023-12-02 16:35:22,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:35:22,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:35:22,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:35:22,332 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:35:22,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 16:35:22,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:35:22,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 44 conjunts are in the unsatisfiable core [2023-12-02 16:35:22,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:35:22,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 16:35:22,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-12-02 16:35:22,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-02 16:35:22,999 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:35:22,999 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:35:23,321 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:35:23,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994685632] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 16:35:23,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 16:35:23,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11, 11] total 26 [2023-12-02 16:35:23,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611886302] [2023-12-02 16:35:23,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:35:23,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 16:35:23,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:35:23,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 16:35:23,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2023-12-02 16:35:23,323 INFO L87 Difference]: Start difference. First operand 1143 states and 2455 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:24,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:35:24,431 INFO L93 Difference]: Finished difference Result 2063 states and 4472 transitions. [2023-12-02 16:35:24,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 16:35:24,432 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 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 31 [2023-12-02 16:35:24,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:35:24,437 INFO L225 Difference]: With dead ends: 2063 [2023-12-02 16:35:24,437 INFO L226 Difference]: Without dead ends: 2063 [2023-12-02 16:35:24,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=221, Invalid=1039, Unknown=0, NotChecked=0, Total=1260 [2023-12-02 16:35:24,438 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 125 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 16:35:24,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 99 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 16:35:24,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2023-12-02 16:35:24,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 1098. [2023-12-02 16:35:24,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1098 states, 1095 states have (on average 2.146118721461187) internal successors, (2350), 1097 states have internal predecessors, (2350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:24,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1098 states to 1098 states and 2350 transitions. [2023-12-02 16:35:24,475 INFO L78 Accepts]: Start accepts. Automaton has 1098 states and 2350 transitions. Word has length 31 [2023-12-02 16:35:24,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:35:24,475 INFO L495 AbstractCegarLoop]: Abstraction has 1098 states and 2350 transitions. [2023-12-02 16:35:24,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:24,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1098 states and 2350 transitions. [2023-12-02 16:35:24,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-02 16:35:24,477 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:35:24,477 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:35:24,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 16:35:24,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-02 16:35:24,683 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting workerErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-12-02 16:35:24,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:35:24,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1449327222, now seen corresponding path program 2 times [2023-12-02 16:35:24,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:35:24,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764623998] [2023-12-02 16:35:24,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:35:24,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:35:24,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:35:25,013 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:35:25,013 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:35:25,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764623998] [2023-12-02 16:35:25,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764623998] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:35:25,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450415881] [2023-12-02 16:35:25,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 16:35:25,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:35:25,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:35:25,015 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:35:25,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 16:35:25,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 16:35:25,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:35:25,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 44 conjunts are in the unsatisfiable core [2023-12-02 16:35:25,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:35:25,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 16:35:25,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-12-02 16:35:25,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-02 16:35:25,611 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:35:25,611 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:35:25,874 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:35:25,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450415881] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 16:35:25,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 16:35:25,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11, 11] total 26 [2023-12-02 16:35:25,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959539471] [2023-12-02 16:35:25,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:35:25,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 16:35:25,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:35:25,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 16:35:25,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2023-12-02 16:35:25,876 INFO L87 Difference]: Start difference. First operand 1098 states and 2350 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:26,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:35:26,827 INFO L93 Difference]: Finished difference Result 1913 states and 4183 transitions. [2023-12-02 16:35:26,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 16:35:26,828 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 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 31 [2023-12-02 16:35:26,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:35:26,831 INFO L225 Difference]: With dead ends: 1913 [2023-12-02 16:35:26,831 INFO L226 Difference]: Without dead ends: 1913 [2023-12-02 16:35:26,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=206, Invalid=1054, Unknown=0, NotChecked=0, Total=1260 [2023-12-02 16:35:26,832 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 123 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 16:35:26,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 130 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 16:35:26,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2023-12-02 16:35:26,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1130. [2023-12-02 16:35:26,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1130 states, 1127 states have (on average 2.165039929015084) internal successors, (2440), 1129 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:26,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 2440 transitions. [2023-12-02 16:35:26,854 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 2440 transitions. Word has length 31 [2023-12-02 16:35:26,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:35:26,854 INFO L495 AbstractCegarLoop]: Abstraction has 1130 states and 2440 transitions. [2023-12-02 16:35:26,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:26,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 2440 transitions. [2023-12-02 16:35:26,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-02 16:35:26,855 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:35:26,855 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:35:26,860 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 16:35:27,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-12-02 16:35:27,056 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting workerErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-12-02 16:35:27,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:35:27,057 INFO L85 PathProgramCache]: Analyzing trace with hash 740012194, now seen corresponding path program 3 times [2023-12-02 16:35:27,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:35:27,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976406204] [2023-12-02 16:35:27,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:35:27,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:35:27,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:35:27,314 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:35:27,314 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:35:27,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976406204] [2023-12-02 16:35:27,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976406204] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:35:27,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299068589] [2023-12-02 16:35:27,315 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 16:35:27,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:35:27,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:35:27,316 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:35:27,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 16:35:27,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 16:35:27,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:35:27,412 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 16:35:27,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:35:27,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-02 16:35:27,472 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:35:27,472 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:35:27,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299068589] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:35:27,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:35:27,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2023-12-02 16:35:27,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720023599] [2023-12-02 16:35:27,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:35:27,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:35:27,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:35:27,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:35:27,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2023-12-02 16:35:27,474 INFO L87 Difference]: Start difference. First operand 1130 states and 2440 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:27,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:35:27,604 INFO L93 Difference]: Finished difference Result 339 states and 633 transitions. [2023-12-02 16:35:27,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 16:35:27,605 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 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 31 [2023-12-02 16:35:27,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:35:27,605 INFO L225 Difference]: With dead ends: 339 [2023-12-02 16:35:27,606 INFO L226 Difference]: Without dead ends: 339 [2023-12-02 16:35:27,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-12-02 16:35:27,606 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 86 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:35:27,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 43 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:35:27,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2023-12-02 16:35:27,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 321. [2023-12-02 16:35:27,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 319 states have (on average 1.921630094043887) internal successors, (613), 320 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:27,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 613 transitions. [2023-12-02 16:35:27,612 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 613 transitions. Word has length 31 [2023-12-02 16:35:27,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:35:27,613 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 613 transitions. [2023-12-02 16:35:27,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:27,613 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 613 transitions. [2023-12-02 16:35:27,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 16:35:27,614 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:35:27,614 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:35:27,619 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 16:35:27,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-12-02 16:35:27,819 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting workerErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-12-02 16:35:27,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:35:27,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1663324930, now seen corresponding path program 1 times [2023-12-02 16:35:27,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:35:27,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146691934] [2023-12-02 16:35:27,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:35:27,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:35:27,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:35:28,351 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:35:28,351 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:35:28,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146691934] [2023-12-02 16:35:28,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146691934] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:35:28,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151736126] [2023-12-02 16:35:28,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:35:28,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:35:28,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:35:28,353 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:35:28,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 16:35:28,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:35:28,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 55 conjunts are in the unsatisfiable core [2023-12-02 16:35:28,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:35:28,493 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 16:35:28,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-02 16:35:28,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 16:35:28,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 16:35:28,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-12-02 16:35:28,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-12-02 16:35:29,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-02 16:35:29,019 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:35:29,019 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:35:34,918 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:35:34,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2023-12-02 16:35:34,927 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:35:34,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 37 [2023-12-02 16:35:34,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-12-02 16:35:34,944 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:35:34,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151736126] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 16:35:34,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 16:35:34,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [17, 12] total 36 [2023-12-02 16:35:34,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956624914] [2023-12-02 16:35:34,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:35:34,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 16:35:34,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:35:34,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 16:35:34,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1105, Unknown=5, NotChecked=0, Total=1332 [2023-12-02 16:35:34,946 INFO L87 Difference]: Start difference. First operand 321 states and 613 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:37,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 16:35:39,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:35:39,353 INFO L93 Difference]: Finished difference Result 518 states and 983 transitions. [2023-12-02 16:35:39,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 16:35:39,354 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 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 32 [2023-12-02 16:35:39,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:35:39,354 INFO L225 Difference]: With dead ends: 518 [2023-12-02 16:35:39,354 INFO L226 Difference]: Without dead ends: 518 [2023-12-02 16:35:39,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=315, Invalid=1660, Unknown=5, NotChecked=0, Total=1980 [2023-12-02 16:35:39,355 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 84 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 3 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-12-02 16:35:39,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 183 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 863 Invalid, 5 Unknown, 0 Unchecked, 3.9s Time] [2023-12-02 16:35:39,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2023-12-02 16:35:39,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 325. [2023-12-02 16:35:39,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 323 states have (on average 1.910216718266254) internal successors, (617), 324 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:39,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 617 transitions. [2023-12-02 16:35:39,362 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 617 transitions. Word has length 32 [2023-12-02 16:35:39,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:35:39,362 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 617 transitions. [2023-12-02 16:35:39,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:39,362 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 617 transitions. [2023-12-02 16:35:39,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 16:35:39,363 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:35:39,363 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:35:39,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-02 16:35:39,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:35:39,564 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting workerErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-12-02 16:35:39,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:35:39,564 INFO L85 PathProgramCache]: Analyzing trace with hash 879244416, now seen corresponding path program 2 times [2023-12-02 16:35:39,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:35:39,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740415766] [2023-12-02 16:35:39,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:35:39,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:35:39,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:35:40,072 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:35:40,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:35:40,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740415766] [2023-12-02 16:35:40,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740415766] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:35:40,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078071449] [2023-12-02 16:35:40,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 16:35:40,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:35:40,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:35:40,073 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:35:40,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 16:35:40,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 16:35:40,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:35:40,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 55 conjunts are in the unsatisfiable core [2023-12-02 16:35:40,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:35:40,218 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 16:35:40,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-02 16:35:40,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 16:35:40,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 16:35:40,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-12-02 16:35:40,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-12-02 16:35:40,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-02 16:35:40,794 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:35:40,794 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:35:48,087 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:35:48,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2023-12-02 16:35:48,096 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:35:48,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 37 [2023-12-02 16:35:48,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-12-02 16:35:48,109 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:35:48,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078071449] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:35:48,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1504138430] [2023-12-02 16:35:48,116 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:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) 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:337) 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:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) 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) [2023-12-02 16:35:48,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:35:48,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 12] total 37 [2023-12-02 16:35:48,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864164815] [2023-12-02 16:35:48,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:35:48,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-12-02 16:35:48,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:35:48,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-12-02 16:35:48,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1183, Unknown=6, NotChecked=0, Total=1406 [2023-12-02 16:35:48,120 INFO L87 Difference]: Start difference. First operand 325 states and 617 transitions. Second operand has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 37 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:35:50,144 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_518 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#tid~0#1.base| v_ArrVal_518) |c_~#pqb~0.base|) |c_~#pqb~0.offset|) 2))) (forall ((v_ArrVal_520 Int)) (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_pqueue_put_~qp#1.base|))) (or (< v_ArrVal_520 (+ (select .cse0 |c_ULTIMATE.start_pqueue_put_~qp#1.offset|) 1)) (< 0 (+ 1 (select (select (store |c_#memory_int| |c_ULTIMATE.start_pqueue_put_~qp#1.base| (store .cse0 |c_ULTIMATE.start_pqueue_put_~qp#1.offset| v_ArrVal_520)) |c_~#pqb~0.base|) |c_~#pqb~0.offset|))))))) is different from false [2023-12-02 16:35:52,360 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 16:35:54,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 16:35:56,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 16:35:59,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 16:36:01,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 16:36:03,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 16:36:05,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 16:36:08,089 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 16:36:10,100 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 16:36:12,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 16:36:14,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 16:36:16,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 16:36:18,328 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 16:36:20,372 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 16:36:24,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 16:36:26,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 16:36:29,052 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 16:36:31,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 16:36:34,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 16:36:36,552 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 16:36:38,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 16:36:38,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:36:38,904 INFO L93 Difference]: Finished difference Result 994 states and 1867 transitions. [2023-12-02 16:36:38,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-12-02 16:36:38,905 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 37 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-12-02 16:36:38,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:36:38,907 INFO L225 Difference]: With dead ends: 994 [2023-12-02 16:36:38,907 INFO L226 Difference]: Without dead ends: 994 [2023-12-02 16:36:38,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1337 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=778, Invalid=3774, Unknown=8, NotChecked=132, Total=4692 [2023-12-02 16:36:38,909 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 501 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 1785 mSolverCounterSat, 13 mSolverCounterUnsat, 21 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 2261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1785 IncrementalHoareTripleChecker+Invalid, 21 IncrementalHoareTripleChecker+Unknown, 442 IncrementalHoareTripleChecker+Unchecked, 46.9s IncrementalHoareTripleChecker+Time [2023-12-02 16:36:38,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [501 Valid, 382 Invalid, 2261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1785 Invalid, 21 Unknown, 442 Unchecked, 46.9s Time] [2023-12-02 16:36:38,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2023-12-02 16:36:38,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 320. [2023-12-02 16:36:38,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 318 states have (on average 1.9245283018867925) internal successors, (612), 319 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:36:38,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 612 transitions. [2023-12-02 16:36:38,920 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 612 transitions. Word has length 32 [2023-12-02 16:36:38,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:36:38,920 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 612 transitions. [2023-12-02 16:36:38,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 37 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:36:38,920 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 612 transitions. [2023-12-02 16:36:38,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 16:36:38,921 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:36:38,921 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:36:38,926 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 16:36:39,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:36:39,122 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting workerErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-12-02 16:36:39,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:36:39,122 INFO L85 PathProgramCache]: Analyzing trace with hash 576747892, now seen corresponding path program 3 times [2023-12-02 16:36:39,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:36:39,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658541740] [2023-12-02 16:36:39,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:36:39,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:36:39,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:36:39,845 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:36:39,845 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:36:39,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658541740] [2023-12-02 16:36:39,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658541740] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:36:39,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649529852] [2023-12-02 16:36:39,846 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 16:36:39,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:36:39,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:36:39,847 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:36:39,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 16:36:39,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 16:36:39,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:36:39,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 57 conjunts are in the unsatisfiable core [2023-12-02 16:36:39,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:36:39,975 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 16:36:39,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-02 16:36:40,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 16:36:40,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 16:36:40,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-12-02 16:36:40,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-12-02 16:36:40,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-02 16:36:40,678 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:36:40,678 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:36:41,462 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:36:41,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2023-12-02 16:36:41,475 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:36:41,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 37 [2023-12-02 16:36:41,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-12-02 16:36:41,552 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:36:41,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649529852] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:36:41,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1285068730] [2023-12-02 16:36:41,553 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:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) 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:337) 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:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 16:36:41,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:36:41,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 12] total 38 [2023-12-02 16:36:41,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598950313] [2023-12-02 16:36:41,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:36:41,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-12-02 16:36:41,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:36:41,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-12-02 16:36:41,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1286, Unknown=0, NotChecked=0, Total=1482 [2023-12-02 16:36:41,556 INFO L87 Difference]: Start difference. First operand 320 states and 612 transitions. Second operand has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:36:53,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 16:36:59,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:36:59,563 INFO L93 Difference]: Finished difference Result 1368 states and 2689 transitions. [2023-12-02 16:36:59,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-12-02 16:36:59,564 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 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 32 [2023-12-02 16:36:59,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:36:59,566 INFO L225 Difference]: With dead ends: 1368 [2023-12-02 16:36:59,567 INFO L226 Difference]: Without dead ends: 1368 [2023-12-02 16:36:59,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3979 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=1791, Invalid=10197, Unknown=2, NotChecked=0, Total=11990 [2023-12-02 16:36:59,571 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1102 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 1895 mSolverCounterSat, 37 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1102 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 1940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1895 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:36:59,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1102 Valid, 432 Invalid, 1940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1895 Invalid, 8 Unknown, 0 Unchecked, 5.1s Time] [2023-12-02 16:36:59,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1368 states. [2023-12-02 16:36:59,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1368 to 267. [2023-12-02 16:36:59,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 265 states have (on average 1.9245283018867925) internal successors, (510), 266 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:36:59,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 510 transitions. [2023-12-02 16:36:59,583 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 510 transitions. Word has length 32 [2023-12-02 16:36:59,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:36:59,583 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 510 transitions. [2023-12-02 16:36:59,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:36:59,584 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 510 transitions. [2023-12-02 16:36:59,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-02 16:36:59,584 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:36:59,584 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:36:59,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-02 16:36:59,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:36:59,785 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting workerErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-12-02 16:36:59,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:36:59,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1189067700, now seen corresponding path program 1 times [2023-12-02 16:36:59,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:36:59,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308677609] [2023-12-02 16:36:59,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:36:59,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:36:59,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:37:00,088 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:37:00,088 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:37:00,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308677609] [2023-12-02 16:37:00,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308677609] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:37:00,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728188835] [2023-12-02 16:37:00,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:37:00,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:37:00,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:37:00,089 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:37:00,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 16:37:00,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:37:00,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 74 conjunts are in the unsatisfiable core [2023-12-02 16:37:00,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:37:00,216 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 16:37:00,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-02 16:37:00,258 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 16:37:00,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 16:37:00,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-02 16:37:00,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-02 16:37:00,952 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 16:37:00,952 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:37:01,342 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:37:01,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2023-12-02 16:37:01,354 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:37:01,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 33 [2023-12-02 16:37:01,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-12-02 16:37:01,410 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 16:37:01,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728188835] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:37:01,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [972913056] [2023-12-02 16:37:01,411 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:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) 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:337) 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:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) 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) [2023-12-02 16:37:01,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:37:01,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2023-12-02 16:37:01,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102906935] [2023-12-02 16:37:01,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:37:01,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-02 16:37:01,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:37:01,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-02 16:37:01,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=842, Unknown=7, NotChecked=0, Total=992 [2023-12-02 16:37:01,413 INFO L87 Difference]: Start difference. First operand 267 states and 510 transitions. Second operand has 32 states, 32 states have (on average 3.375) internal successors, (108), 32 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:37:03,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:37:03,560 INFO L93 Difference]: Finished difference Result 742 states and 1405 transitions. [2023-12-02 16:37:03,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-12-02 16:37:03,561 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.375) internal successors, (108), 32 states have internal predecessors, (108), 0 states have call successors, (0), 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 38 [2023-12-02 16:37:03,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:37:03,562 INFO L225 Difference]: With dead ends: 742 [2023-12-02 16:37:03,562 INFO L226 Difference]: Without dead ends: 528 [2023-12-02 16:37:03,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=437, Invalid=2312, Unknown=7, NotChecked=0, Total=2756 [2023-12-02 16:37:03,564 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 360 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 1630 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 1649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-02 16:37:03,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 226 Invalid, 1649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1630 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-02 16:37:03,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2023-12-02 16:37:03,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 389. [2023-12-02 16:37:03,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 387 states have (on average 1.8449612403100775) internal successors, (714), 388 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:37:03,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 714 transitions. [2023-12-02 16:37:03,570 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 714 transitions. Word has length 38 [2023-12-02 16:37:03,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:37:03,570 INFO L495 AbstractCegarLoop]: Abstraction has 389 states and 714 transitions. [2023-12-02 16:37:03,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.375) internal successors, (108), 32 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:37:03,570 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 714 transitions. [2023-12-02 16:37:03,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-02 16:37:03,571 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:37:03,571 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:37:03,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-02 16:37:03,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:37:03,771 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting workerErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-12-02 16:37:03,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:37:03,772 INFO L85 PathProgramCache]: Analyzing trace with hash 517792515, now seen corresponding path program 1 times [2023-12-02 16:37:03,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:37:03,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137902195] [2023-12-02 16:37:03,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:37:03,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:37:03,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:37:04,295 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:37:04,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:37:04,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137902195] [2023-12-02 16:37:04,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137902195] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:37:04,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551285120] [2023-12-02 16:37:04,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:37:04,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:37:04,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:37:04,297 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:37:04,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 16:37:04,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:37:04,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 42 conjunts are in the unsatisfiable core [2023-12-02 16:37:04,402 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:37:04,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-12-02 16:37:05,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-12-02 16:37:05,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-02 16:37:05,161 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:37:05,161 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:37:11,986 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-12-02 16:37:11,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 36 [2023-12-02 16:37:12,048 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:37:12,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551285120] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:37:12,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [926248587] [2023-12-02 16:37:12,049 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:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) 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:337) 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:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) 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) [2023-12-02 16:37:12,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:37:12,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 31 [2023-12-02 16:37:12,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341600960] [2023-12-02 16:37:12,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:37:12,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-02 16:37:12,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:37:12,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-02 16:37:12,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=758, Unknown=1, NotChecked=0, Total=930 [2023-12-02 16:37:12,051 INFO L87 Difference]: Start difference. First operand 389 states and 714 transitions. Second operand has 31 states, 31 states have (on average 3.5161290322580645) internal successors, (109), 31 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:37:13,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:37:13,803 INFO L93 Difference]: Finished difference Result 760 states and 1386 transitions. [2023-12-02 16:37:13,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-02 16:37:13,803 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.5161290322580645) internal successors, (109), 31 states have internal predecessors, (109), 0 states have call successors, (0), 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 47 [2023-12-02 16:37:13,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:37:13,804 INFO L225 Difference]: With dead ends: 760 [2023-12-02 16:37:13,804 INFO L226 Difference]: Without dead ends: 744 [2023-12-02 16:37:13,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 75 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=411, Invalid=1658, Unknown=1, NotChecked=0, Total=2070 [2023-12-02 16:37:13,806 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 248 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 1139 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 1158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:37:13,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 286 Invalid, 1158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1139 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-02 16:37:13,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2023-12-02 16:37:13,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 427. [2023-12-02 16:37:13,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 425 states have (on average 1.7976470588235294) internal successors, (764), 426 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:37:13,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 764 transitions. [2023-12-02 16:37:13,820 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 764 transitions. Word has length 47 [2023-12-02 16:37:13,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:37:13,820 INFO L495 AbstractCegarLoop]: Abstraction has 427 states and 764 transitions. [2023-12-02 16:37:13,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.5161290322580645) internal successors, (109), 31 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:37:13,821 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 764 transitions. [2023-12-02 16:37:13,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-02 16:37:13,822 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:37:13,822 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:37:13,826 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 16:37:14,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:37:14,022 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting workerErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-12-02 16:37:14,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:37:14,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1899218023, now seen corresponding path program 2 times [2023-12-02 16:37:14,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:37:14,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405488231] [2023-12-02 16:37:14,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:37:14,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:37:14,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:37:14,513 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:37:14,513 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:37:14,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405488231] [2023-12-02 16:37:14,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405488231] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:37:14,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575231166] [2023-12-02 16:37:14,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 16:37:14,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:37:14,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:37:14,515 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:37:14,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 16:37:14,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 16:37:14,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:37:14,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 40 conjunts are in the unsatisfiable core [2023-12-02 16:37:14,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:37:15,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-12-02 16:37:15,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-12-02 16:37:15,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-02 16:37:15,356 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:37:15,356 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:37:16,644 INFO L349 Elim1Store]: treesize reduction 15, result has 71.7 percent of original size [2023-12-02 16:37:16,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 66 treesize of output 83 [2023-12-02 16:37:16,663 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:37:16,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 52 [2023-12-02 16:37:16,719 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:37:16,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2023-12-02 16:37:16,862 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:37:16,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 101 treesize of output 105 [2023-12-02 16:37:17,455 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:37:17,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575231166] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:37:17,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [71598393] [2023-12-02 16:37:17,456 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:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) 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:337) 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:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) 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) [2023-12-02 16:37:17,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:37:17,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 37 [2023-12-02 16:37:17,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034979316] [2023-12-02 16:37:17,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:37:17,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-12-02 16:37:17,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:37:17,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-12-02 16:37:17,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1129, Unknown=0, NotChecked=0, Total=1332 [2023-12-02 16:37:17,458 INFO L87 Difference]: Start difference. First operand 427 states and 764 transitions. Second operand has 37 states, 37 states have (on average 3.5405405405405403) internal successors, (131), 37 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:37:19,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:37:19,327 INFO L93 Difference]: Finished difference Result 746 states and 1351 transitions. [2023-12-02 16:37:19,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-02 16:37:19,328 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.5405405405405403) internal successors, (131), 37 states have internal predecessors, (131), 0 states have call successors, (0), 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 47 [2023-12-02 16:37:19,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:37:19,330 INFO L225 Difference]: With dead ends: 746 [2023-12-02 16:37:19,330 INFO L226 Difference]: Without dead ends: 732 [2023-12-02 16:37:19,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=553, Invalid=2309, Unknown=0, NotChecked=0, Total=2862 [2023-12-02 16:37:19,332 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 409 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 1098 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 1140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:37:19,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [409 Valid, 291 Invalid, 1140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1098 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-02 16:37:19,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2023-12-02 16:37:19,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 427. [2023-12-02 16:37:19,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 425 states have (on average 1.7976470588235294) internal successors, (764), 426 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:37:19,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 764 transitions. [2023-12-02 16:37:19,339 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 764 transitions. Word has length 47 [2023-12-02 16:37:19,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:37:19,339 INFO L495 AbstractCegarLoop]: Abstraction has 427 states and 764 transitions. [2023-12-02 16:37:19,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.5405405405405403) internal successors, (131), 37 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:37:19,339 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 764 transitions. [2023-12-02 16:37:19,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-02 16:37:19,340 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:37:19,340 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:37:19,345 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 16:37:19,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-12-02 16:37:19,541 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting workerErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-12-02 16:37:19,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:37:19,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1950210871, now seen corresponding path program 3 times [2023-12-02 16:37:19,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:37:19,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112269212] [2023-12-02 16:37:19,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:37:19,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:37:19,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:37:20,035 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:37:20,036 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:37:20,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112269212] [2023-12-02 16:37:20,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112269212] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:37:20,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152412517] [2023-12-02 16:37:20,036 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 16:37:20,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:37:20,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:37:20,037 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:37:20,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 16:37:20,146 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 16:37:20,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:37:20,148 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 38 conjunts are in the unsatisfiable core [2023-12-02 16:37:20,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:37:20,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-12-02 16:37:20,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-12-02 16:37:20,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-02 16:37:20,645 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:37:20,645 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:37:21,155 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-12-02 16:37:21,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 36 [2023-12-02 16:37:21,227 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:37:21,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152412517] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:37:21,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1332808593] [2023-12-02 16:37:21,228 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:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) 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:337) 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:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) 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) [2023-12-02 16:37:21,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:37:21,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 26 [2023-12-02 16:37:21,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802898114] [2023-12-02 16:37:21,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:37:21,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-02 16:37:21,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:37:21,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-02 16:37:21,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2023-12-02 16:37:21,231 INFO L87 Difference]: Start difference. First operand 427 states and 764 transitions. Second operand has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 26 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:37:23,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:37:23,727 INFO L93 Difference]: Finished difference Result 903 states and 1649 transitions. [2023-12-02 16:37:23,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-02 16:37:23,727 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 26 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-12-02 16:37:23,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:37:23,729 INFO L225 Difference]: With dead ends: 903 [2023-12-02 16:37:23,729 INFO L226 Difference]: Without dead ends: 895 [2023-12-02 16:37:23,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 79 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=363, Invalid=1617, Unknown=0, NotChecked=0, Total=1980 [2023-12-02 16:37:23,730 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 288 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 1411 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 1455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-12-02 16:37:23,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 303 Invalid, 1455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1411 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-12-02 16:37:23,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2023-12-02 16:37:23,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 549. [2023-12-02 16:37:23,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 547 states have (on average 1.8244972577696525) internal successors, (998), 548 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:37:23,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 998 transitions. [2023-12-02 16:37:23,742 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 998 transitions. Word has length 47 [2023-12-02 16:37:23,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:37:23,743 INFO L495 AbstractCegarLoop]: Abstraction has 549 states and 998 transitions. [2023-12-02 16:37:23,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 26 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:37:23,743 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 998 transitions. [2023-12-02 16:37:23,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-02 16:37:23,744 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:37:23,744 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:37:23,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 16:37:23,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-12-02 16:37:23,945 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting workerErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-12-02 16:37:23,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:37:23,945 INFO L85 PathProgramCache]: Analyzing trace with hash -494619199, now seen corresponding path program 4 times [2023-12-02 16:37:23,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:37:23,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781607856] [2023-12-02 16:37:23,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:37:23,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:37:23,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:37:24,432 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:37:24,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:37:24,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781607856] [2023-12-02 16:37:24,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781607856] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:37:24,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184184735] [2023-12-02 16:37:24,433 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 16:37:24,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:37:24,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:37:24,434 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:37:24,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 16:37:24,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:37:24,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 42 conjunts are in the unsatisfiable core [2023-12-02 16:37:24,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:37:25,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-12-02 16:37:25,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-12-02 16:37:25,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-02 16:37:25,361 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:37:25,361 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:37:25,899 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-12-02 16:37:25,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 36 [2023-12-02 16:37:25,951 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:37:25,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184184735] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:37:25,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1552047421] [2023-12-02 16:37:25,952 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:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) 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:337) 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:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) 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) [2023-12-02 16:37:25,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:37:25,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 32 [2023-12-02 16:37:25,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972994844] [2023-12-02 16:37:25,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:37:25,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-02 16:37:25,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:37:25,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-02 16:37:25,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2023-12-02 16:37:25,954 INFO L87 Difference]: Start difference. First operand 549 states and 998 transitions. Second operand has 32 states, 32 states have (on average 3.46875) internal successors, (111), 32 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:37:27,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:37:27,816 INFO L93 Difference]: Finished difference Result 753 states and 1365 transitions. [2023-12-02 16:37:27,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-12-02 16:37:27,817 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.46875) internal successors, (111), 32 states have internal predecessors, (111), 0 states have call successors, (0), 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 47 [2023-12-02 16:37:27,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:37:27,817 INFO L225 Difference]: With dead ends: 753 [2023-12-02 16:37:27,817 INFO L226 Difference]: Without dead ends: 236 [2023-12-02 16:37:27,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=516, Invalid=2034, Unknown=0, NotChecked=0, Total=2550 [2023-12-02 16:37:27,818 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 372 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 1254 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:37:27,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 292 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1254 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-02 16:37:27,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2023-12-02 16:37:27,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 210. [2023-12-02 16:37:27,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 208 states have (on average 1.7067307692307692) internal successors, (355), 209 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:37:27,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 355 transitions. [2023-12-02 16:37:27,822 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 355 transitions. Word has length 47 [2023-12-02 16:37:27,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:37:27,822 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 355 transitions. [2023-12-02 16:37:27,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.46875) internal successors, (111), 32 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:37:27,822 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 355 transitions. [2023-12-02 16:37:27,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-02 16:37:27,822 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:37:27,823 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:37:27,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-02 16:37:28,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-12-02 16:37:28,023 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting workerErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-12-02 16:37:28,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:37:28,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1646396289, now seen corresponding path program 5 times [2023-12-02 16:37:28,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:37:28,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22989748] [2023-12-02 16:37:28,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:37:28,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:37:28,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:37:28,544 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:37:28,545 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:37:28,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22989748] [2023-12-02 16:37:28,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22989748] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:37:28,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752078018] [2023-12-02 16:37:28,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 16:37:28,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:37:28,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:37:28,546 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:37:28,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 16:37:28,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 16:37:28,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:37:28,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 42 conjunts are in the unsatisfiable core [2023-12-02 16:37:28,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:37:29,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-12-02 16:37:29,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-12-02 16:37:29,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-02 16:37:29,364 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 16:37:29,364 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:37:29,934 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:37:29,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 205 treesize of output 218 [2023-12-02 16:37:30,639 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 16:37:30,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752078018] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:37:30,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [754053773] [2023-12-02 16:37:30,640 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:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) 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:337) 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:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) 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) [2023-12-02 16:37:30,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:37:30,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 31 [2023-12-02 16:37:30,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900215735] [2023-12-02 16:37:30,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:37:30,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-02 16:37:30,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:37:30,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-02 16:37:30,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2023-12-02 16:37:30,643 INFO L87 Difference]: Start difference. First operand 210 states and 355 transitions. Second operand has 31 states, 31 states have (on average 3.5161290322580645) internal successors, (109), 31 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:37:32,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:37:32,527 INFO L93 Difference]: Finished difference Result 363 states and 604 transitions. [2023-12-02 16:37:32,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-02 16:37:32,528 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.5161290322580645) internal successors, (109), 31 states have internal predecessors, (109), 0 states have call successors, (0), 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 47 [2023-12-02 16:37:32,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:37:32,529 INFO L225 Difference]: With dead ends: 363 [2023-12-02 16:37:32,529 INFO L226 Difference]: Without dead ends: 193 [2023-12-02 16:37:32,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 75 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=413, Invalid=1749, Unknown=0, NotChecked=0, Total=2162 [2023-12-02 16:37:32,530 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 334 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 1298 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 1323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-02 16:37:32,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 342 Invalid, 1323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1298 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-02 16:37:32,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2023-12-02 16:37:32,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 162. [2023-12-02 16:37:32,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 160 states have (on average 1.71875) internal successors, (275), 161 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:37:32,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 275 transitions. [2023-12-02 16:37:32,533 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 275 transitions. Word has length 47 [2023-12-02 16:37:32,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:37:32,534 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 275 transitions. [2023-12-02 16:37:32,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.5161290322580645) internal successors, (109), 31 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:37:32,534 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 275 transitions. [2023-12-02 16:37:32,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-02 16:37:32,534 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:37:32,535 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:37:32,540 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 16:37:32,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-12-02 16:37:32,735 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting workerErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-12-02 16:37:32,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:37:32,736 INFO L85 PathProgramCache]: Analyzing trace with hash -597223709, now seen corresponding path program 6 times [2023-12-02 16:37:32,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:37:32,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746858018] [2023-12-02 16:37:32,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:37:32,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:37:32,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:37:33,207 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 16:37:33,207 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:37:33,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746858018] [2023-12-02 16:37:33,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746858018] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:37:33,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453383859] [2023-12-02 16:37:33,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 16:37:33,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:37:33,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:37:33,209 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:37:33,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 16:37:33,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 16:37:33,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:37:33,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 42 conjunts are in the unsatisfiable core [2023-12-02 16:37:33,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:37:33,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-12-02 16:37:33,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-12-02 16:37:33,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-02 16:37:33,615 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 16:37:33,615 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:37:36,442 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:37:36,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 117 treesize of output 134 [2023-12-02 16:37:37,105 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 16:37:37,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453383859] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:37:37,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1567962721] [2023-12-02 16:37:37,106 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:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) 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:337) 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:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) 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) [2023-12-02 16:37:37,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:37:37,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 23 [2023-12-02 16:37:37,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224803693] [2023-12-02 16:37:37,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:37:37,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-02 16:37:37,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:37:37,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-02 16:37:37,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=403, Unknown=1, NotChecked=0, Total=506 [2023-12-02 16:37:37,108 INFO L87 Difference]: Start difference. First operand 162 states and 275 transitions. Second operand has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 23 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:37:38,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:37:38,097 INFO L93 Difference]: Finished difference Result 158 states and 254 transitions. [2023-12-02 16:37:38,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-02 16:37:38,097 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 23 states have internal predecessors, (74), 0 states have call successors, (0), 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 47 [2023-12-02 16:37:38,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:37:38,097 INFO L225 Difference]: With dead ends: 158 [2023-12-02 16:37:38,097 INFO L226 Difference]: Without dead ends: 0 [2023-12-02 16:37:38,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 93 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=284, Invalid=1047, Unknown=1, NotChecked=0, Total=1332 [2023-12-02 16:37:38,099 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 160 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 16:37:38,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 159 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 16:37:38,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-12-02 16:37:38,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-12-02 16:37:38,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:37:38,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-12-02 16:37:38,099 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 47 [2023-12-02 16:37:38,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:37:38,100 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-12-02 16:37:38,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 23 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:37:38,100 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-12-02 16:37:38,100 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-12-02 16:37:38,102 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 40 remaining) [2023-12-02 16:37:38,102 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 40 remaining) [2023-12-02 16:37:38,102 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 40 remaining) [2023-12-02 16:37:38,102 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 40 remaining) [2023-12-02 16:37:38,102 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK (35 of 40 remaining) [2023-12-02 16:37:38,102 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 40 remaining) [2023-12-02 16:37:38,102 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 40 remaining) [2023-12-02 16:37:38,102 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 40 remaining) [2023-12-02 16:37:38,102 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 40 remaining) [2023-12-02 16:37:38,102 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 40 remaining) [2023-12-02 16:37:38,103 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 40 remaining) [2023-12-02 16:37:38,103 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (28 of 40 remaining) [2023-12-02 16:37:38,103 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 40 remaining) [2023-12-02 16:37:38,103 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 40 remaining) [2023-12-02 16:37:38,103 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 40 remaining) [2023-12-02 16:37:38,103 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 40 remaining) [2023-12-02 16:37:38,103 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 40 remaining) [2023-12-02 16:37:38,103 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 40 remaining) [2023-12-02 16:37:38,103 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 40 remaining) [2023-12-02 16:37:38,103 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 40 remaining) [2023-12-02 16:37:38,103 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr7ASSERT_VIOLATIONMEMORY_LEAK (19 of 40 remaining) [2023-12-02 16:37:38,103 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr4ASSERT_VIOLATIONMEMORY_LEAK (18 of 40 remaining) [2023-12-02 16:37:38,103 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 40 remaining) [2023-12-02 16:37:38,103 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 40 remaining) [2023-12-02 16:37:38,104 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 40 remaining) [2023-12-02 16:37:38,104 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 40 remaining) [2023-12-02 16:37:38,104 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 40 remaining) [2023-12-02 16:37:38,104 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 40 remaining) [2023-12-02 16:37:38,104 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 40 remaining) [2023-12-02 16:37:38,104 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 40 remaining) [2023-12-02 16:37:38,104 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 40 remaining) [2023-12-02 16:37:38,104 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 40 remaining) [2023-12-02 16:37:38,104 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 40 remaining) [2023-12-02 16:37:38,104 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 40 remaining) [2023-12-02 16:37:38,104 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr7ASSERT_VIOLATIONMEMORY_LEAK (5 of 40 remaining) [2023-12-02 16:37:38,104 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr4ASSERT_VIOLATIONMEMORY_LEAK (4 of 40 remaining) [2023-12-02 16:37:38,104 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 40 remaining) [2023-12-02 16:37:38,104 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 40 remaining) [2023-12-02 16:37:38,104 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 40 remaining) [2023-12-02 16:37:38,105 INFO L805 garLoopResultBuilder]: Registering result SAFE for location workerErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 40 remaining) [2023-12-02 16:37:38,110 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 16:37:38,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-12-02 16:37:38,308 INFO L445 BasicCegarLoop]: Path program histogram: [8, 6, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:37:38,312 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-12-02 16:37:38,312 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-12-02 16:37:38,315 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 04:37:38 BasicIcfg [2023-12-02 16:37:38,315 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-02 16:37:38,316 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-12-02 16:37:38,316 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-12-02 16:37:38,316 INFO L274 PluginConnector]: Witness Printer initialized [2023-12-02 16:37:38,316 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:35:07" (3/4) ... [2023-12-02 16:37:38,318 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-12-02 16:37:38,320 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure worker [2023-12-02 16:37:38,325 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 49 nodes and edges [2023-12-02 16:37:38,325 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2023-12-02 16:37:38,325 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2023-12-02 16:37:38,325 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-12-02 16:37:38,406 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/witness.graphml [2023-12-02 16:37:38,407 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/witness.yml [2023-12-02 16:37:38,407 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-12-02 16:37:38,407 INFO L158 Benchmark]: Toolchain (without parser) took 152366.19ms. Allocated memory was 172.0MB in the beginning and 299.9MB in the end (delta: 127.9MB). Free memory was 137.5MB in the beginning and 232.5MB in the end (delta: -95.0MB). Peak memory consumption was 34.8MB. Max. memory is 16.1GB. [2023-12-02 16:37:38,408 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 121.6MB. Free memory is still 67.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 16:37:38,408 INFO L158 Benchmark]: CACSL2BoogieTranslator took 426.57ms. Allocated memory is still 172.0MB. Free memory was 137.5MB in the beginning and 117.4MB in the end (delta: 20.1MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2023-12-02 16:37:38,408 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.15ms. Allocated memory is still 172.0MB. Free memory was 117.4MB in the beginning and 114.5MB in the end (delta: 2.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-12-02 16:37:38,409 INFO L158 Benchmark]: Boogie Preprocessor took 35.27ms. Allocated memory is still 172.0MB. Free memory was 114.5MB in the beginning and 113.2MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 16:37:38,409 INFO L158 Benchmark]: RCFGBuilder took 571.77ms. Allocated memory is still 172.0MB. Free memory was 113.2MB in the beginning and 76.5MB in the end (delta: 36.7MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. [2023-12-02 16:37:38,409 INFO L158 Benchmark]: TraceAbstraction took 151185.17ms. Allocated memory was 172.0MB in the beginning and 299.9MB in the end (delta: 127.9MB). Free memory was 75.6MB in the beginning and 238.2MB in the end (delta: -162.6MB). There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 16:37:38,410 INFO L158 Benchmark]: Witness Printer took 91.31ms. Allocated memory is still 299.9MB. Free memory was 238.2MB in the beginning and 232.5MB in the end (delta: 5.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-12-02 16:37:38,411 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 121.6MB. Free memory is still 67.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 426.57ms. Allocated memory is still 172.0MB. Free memory was 137.5MB in the beginning and 117.4MB in the end (delta: 20.1MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.15ms. Allocated memory is still 172.0MB. Free memory was 117.4MB in the beginning and 114.5MB in the end (delta: 2.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 35.27ms. Allocated memory is still 172.0MB. Free memory was 114.5MB in the beginning and 113.2MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 571.77ms. Allocated memory is still 172.0MB. Free memory was 113.2MB in the beginning and 76.5MB in the end (delta: 36.7MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. * TraceAbstraction took 151185.17ms. Allocated memory was 172.0MB in the beginning and 299.9MB in the end (delta: 127.9MB). Free memory was 75.6MB in the beginning and 238.2MB in the end (delta: -162.6MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 91.31ms. Allocated memory is still 299.9MB. Free memory was 238.2MB in the beginning and 232.5MB in the end (delta: 5.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 743]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 18]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 18]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 112 locations, 40 error locations. Started 1 CEGAR loops. OverallTime: 151.1s, OverallIterations: 39, TraceHistogramMax: 2, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 97.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 34 mSolverCounterUnknown, 7988 SdHoareTripleChecker+Valid, 72.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7988 mSDsluCounter, 6135 SdHoareTripleChecker+Invalid, 69.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 442 IncrementalHoareTripleChecker+Unchecked, 5108 mSDsCounter, 420 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 23984 IncrementalHoareTripleChecker+Invalid, 24880 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 420 mSolverCounterUnsat, 1027 mSDtfsCounter, 23984 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1703 GetRequests, 816 SyntacticMatches, 23 SemanticMatches, 864 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 11567 ImplicationChecksByTransitivity, 54.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1341occurred in iteration=24, InterpolantAutomatonStates: 601, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 39 MinimizatonAttempts, 10575 StatesRemovedByMinimization, 29 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 47.9s InterpolantComputationTime, 1415 NumberOfCodeBlocks, 1386 NumberOfCodeBlocksAsserted, 58 NumberOfCheckSat, 1829 ConstructedInterpolants, 171 QuantifiedInterpolants, 21408 SizeOfPredicates, 245 NumberOfNonLiveVariables, 3359 ConjunctsInSsa, 595 ConjunctsInUnsatCore, 64 InterpolantComputations, 30 PerfectInterpolantSequences, 101/382 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 25 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-12-02 16:37:38,474 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff31752-ff60-44d3-bab9-76122a2b1568/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE