./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp2.5.prop1-back-serstep.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp2.5.prop1-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash af1b351254fcfd6e7ac8c55f8a193390f7b767b78e2e14e72e25b1d160c14d6a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 11:41:08,515 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:41:08,517 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:41:08,548 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:41:08,549 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:41:08,551 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:41:08,554 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:41:08,559 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:41:08,562 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:41:08,564 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:41:08,566 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:41:08,568 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:41:08,570 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:41:08,573 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:41:08,575 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:41:08,578 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:41:08,580 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:41:08,587 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:41:08,589 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:41:08,591 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:41:08,595 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:41:08,598 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:41:08,599 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:41:08,600 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:41:08,604 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:41:08,604 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:41:08,605 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:41:08,606 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:41:08,606 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:41:08,607 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:41:08,608 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:41:08,609 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:41:08,610 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:41:08,611 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:41:08,616 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:41:08,617 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:41:08,618 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:41:08,618 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:41:08,618 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:41:08,619 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:41:08,620 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:41:08,621 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-16 11:41:08,665 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:41:08,665 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:41:08,666 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:41:08,666 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:41:08,666 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:41:08,667 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:41:08,667 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:41:08,667 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:41:08,668 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:41:08,668 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:41:08,668 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:41:08,668 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:41:08,669 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:41:08,669 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:41:08,669 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:41:08,669 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:41:08,669 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:41:08,670 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:41:08,670 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:41:08,670 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:41:08,670 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:41:08,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:41:08,673 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:41:08,674 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:41:08,674 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:41:08,674 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:41:08,674 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:41:08,675 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:41:08,675 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:41:08,676 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:41:08,676 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> af1b351254fcfd6e7ac8c55f8a193390f7b767b78e2e14e72e25b1d160c14d6a [2022-11-16 11:41:08,951 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:41:08,977 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:41:08,980 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:41:08,983 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:41:08,984 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:41:08,985 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp2.5.prop1-back-serstep.c [2022-11-16 11:41:09,054 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/data/32831aa22/1815844a0bc24611b64d9262da90b68d/FLAG5fe2cb38a [2022-11-16 11:41:09,800 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:41:09,800 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp2.5.prop1-back-serstep.c [2022-11-16 11:41:09,836 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/data/32831aa22/1815844a0bc24611b64d9262da90b68d/FLAG5fe2cb38a [2022-11-16 11:41:10,071 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/data/32831aa22/1815844a0bc24611b64d9262da90b68d [2022-11-16 11:41:10,074 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:41:10,075 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:41:10,077 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:41:10,077 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:41:10,081 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:41:10,081 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:41:10" (1/1) ... [2022-11-16 11:41:10,082 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a692d52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:41:10, skipping insertion in model container [2022-11-16 11:41:10,083 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:41:10" (1/1) ... [2022-11-16 11:41:10,090 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:41:10,157 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:41:10,433 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp2.5.prop1-back-serstep.c[1014,1027] [2022-11-16 11:41:11,043 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:41:11,047 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:41:11,058 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp2.5.prop1-back-serstep.c[1014,1027] [2022-11-16 11:41:11,260 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:41:11,272 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:41:11,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:41:11 WrapperNode [2022-11-16 11:41:11,275 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:41:11,277 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:41:11,278 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:41:11,278 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:41:11,286 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:41:11" (1/1) ... [2022-11-16 11:41:11,352 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:41:11" (1/1) ... [2022-11-16 11:41:11,624 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 5269 [2022-11-16 11:41:11,624 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:41:11,625 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:41:11,626 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:41:11,626 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:41:11,635 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:41:11" (1/1) ... [2022-11-16 11:41:11,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:41:11" (1/1) ... [2022-11-16 11:41:11,658 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:41:11" (1/1) ... [2022-11-16 11:41:11,658 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:41:11" (1/1) ... [2022-11-16 11:41:11,759 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:41:11" (1/1) ... [2022-11-16 11:41:11,861 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:41:11" (1/1) ... [2022-11-16 11:41:11,901 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:41:11" (1/1) ... [2022-11-16 11:41:11,920 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:41:11" (1/1) ... [2022-11-16 11:41:11,967 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:41:11,968 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:41:11,969 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:41:11,969 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:41:11,970 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:41:11" (1/1) ... [2022-11-16 11:41:11,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:41:11,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:41:12,011 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:41:12,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:41:12,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:41:12,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:41:12,736 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:41:12,739 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:41:18,666 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:41:18,690 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:41:18,690 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-16 11:41:18,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:41:18 BoogieIcfgContainer [2022-11-16 11:41:18,694 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:41:18,697 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:41:18,697 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:41:18,701 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:41:18,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:41:10" (1/3) ... [2022-11-16 11:41:18,703 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@120e0012 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:41:18, skipping insertion in model container [2022-11-16 11:41:18,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:41:11" (2/3) ... [2022-11-16 11:41:18,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@120e0012 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:41:18, skipping insertion in model container [2022-11-16 11:41:18,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:41:18" (3/3) ... [2022-11-16 11:41:18,705 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.brp2.5.prop1-back-serstep.c [2022-11-16 11:41:18,725 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:41:18,725 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:41:18,829 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:41:18,837 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3a4561bf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:41:18,838 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 11:41:18,846 INFO L276 IsEmpty]: Start isEmpty. Operand has 902 states, 900 states have (on average 1.6644444444444444) internal successors, (1498), 901 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:18,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-11-16 11:41:18,873 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:41:18,874 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:41:18,875 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:41:18,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:41:18,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1976997793, now seen corresponding path program 1 times [2022-11-16 11:41:18,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:41:18,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17950733] [2022-11-16 11:41:18,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:18,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:41:19,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:41:20,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:41:20,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:41:20,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17950733] [2022-11-16 11:41:20,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17950733] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:41:20,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:41:20,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:41:20,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649097401] [2022-11-16 11:41:20,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:41:20,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:41:20,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:41:20,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:41:20,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:41:20,575 INFO L87 Difference]: Start difference. First operand has 902 states, 900 states have (on average 1.6644444444444444) internal successors, (1498), 901 states have internal predecessors, (1498), 0 states have call successors, (0), 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 4 states, 4 states have (on average 45.25) internal successors, (181), 4 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:22,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:41:22,554 INFO L93 Difference]: Finished difference Result 2956 states and 4922 transitions. [2022-11-16 11:41:22,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:41:22,557 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.25) internal successors, (181), 4 states have internal predecessors, (181), 0 states have call successors, (0), 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 181 [2022-11-16 11:41:22,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:41:22,582 INFO L225 Difference]: With dead ends: 2956 [2022-11-16 11:41:22,583 INFO L226 Difference]: Without dead ends: 2056 [2022-11-16 11:41:22,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:41:22,593 INFO L413 NwaCegarLoop]: 1930 mSDtfsCounter, 4452 mSDsluCounter, 2363 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4452 SdHoareTripleChecker+Valid, 4293 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:41:22,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4452 Valid, 4293 Invalid, 18 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-16 11:41:22,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2056 states. [2022-11-16 11:41:22,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2056 to 900. [2022-11-16 11:41:22,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 899 states have (on average 1.6618464961067854) internal successors, (1494), 899 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:22,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 1494 transitions. [2022-11-16 11:41:22,679 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 1494 transitions. Word has length 181 [2022-11-16 11:41:22,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:41:22,680 INFO L495 AbstractCegarLoop]: Abstraction has 900 states and 1494 transitions. [2022-11-16 11:41:22,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.25) internal successors, (181), 4 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:22,681 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 1494 transitions. [2022-11-16 11:41:22,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-16 11:41:22,686 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:41:22,686 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:41:22,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:41:22,691 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:41:22,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:41:22,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1159115443, now seen corresponding path program 1 times [2022-11-16 11:41:22,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:41:22,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19397519] [2022-11-16 11:41:22,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:22,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:41:22,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:41:23,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:41:23,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:41:23,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19397519] [2022-11-16 11:41:23,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19397519] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:41:23,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:41:23,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:41:23,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843365401] [2022-11-16 11:41:23,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:41:23,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:41:23,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:41:23,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:41:23,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:41:23,845 INFO L87 Difference]: Start difference. First operand 900 states and 1494 transitions. Second operand has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:25,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:41:25,217 INFO L93 Difference]: Finished difference Result 3581 states and 5954 transitions. [2022-11-16 11:41:25,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:41:25,224 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2022-11-16 11:41:25,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:41:25,237 INFO L225 Difference]: With dead ends: 3581 [2022-11-16 11:41:25,238 INFO L226 Difference]: Without dead ends: 2683 [2022-11-16 11:41:25,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:41:25,247 INFO L413 NwaCegarLoop]: 1924 mSDtfsCounter, 3841 mSDsluCounter, 2972 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3841 SdHoareTripleChecker+Valid, 4896 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:41:25,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3841 Valid, 4896 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-16 11:41:25,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2683 states. [2022-11-16 11:41:25,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2683 to 1163. [2022-11-16 11:41:25,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1163 states, 1162 states have (on average 1.661790017211704) internal successors, (1931), 1162 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:25,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 1931 transitions. [2022-11-16 11:41:25,299 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 1931 transitions. Word has length 182 [2022-11-16 11:41:25,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:41:25,301 INFO L495 AbstractCegarLoop]: Abstraction has 1163 states and 1931 transitions. [2022-11-16 11:41:25,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:25,302 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 1931 transitions. [2022-11-16 11:41:25,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 780 [2022-11-16 11:41:25,335 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:41:25,336 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:41:25,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:41:25,337 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:41:25,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:41:25,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1348710314, now seen corresponding path program 1 times [2022-11-16 11:41:25,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:41:25,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718914413] [2022-11-16 11:41:25,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:25,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:41:25,868 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:41:25,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [352330513] [2022-11-16 11:41:25,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:25,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:41:25,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:41:25,875 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:41:25,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:41:28,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:41:28,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 6546 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 11:41:28,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:41:29,373 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 178 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:41:29,374 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:41:29,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:41:29,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718914413] [2022-11-16 11:41:29,374 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:41:29,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352330513] [2022-11-16 11:41:29,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352330513] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:41:29,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:41:29,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:41:29,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749548749] [2022-11-16 11:41:29,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:41:29,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:41:29,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:41:29,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:41:29,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:41:29,380 INFO L87 Difference]: Start difference. First operand 1163 states and 1931 transitions. Second operand has 5 states, 5 states have (on average 155.8) internal successors, (779), 5 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:30,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:41:30,247 INFO L93 Difference]: Finished difference Result 2957 states and 4911 transitions. [2022-11-16 11:41:30,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:41:30,249 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 155.8) internal successors, (779), 5 states have internal predecessors, (779), 0 states have call successors, (0), 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 779 [2022-11-16 11:41:30,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:41:30,256 INFO L225 Difference]: With dead ends: 2957 [2022-11-16 11:41:30,257 INFO L226 Difference]: Without dead ends: 2059 [2022-11-16 11:41:30,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 779 GetRequests, 775 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:41:30,261 INFO L413 NwaCegarLoop]: 1758 mSDtfsCounter, 2795 mSDsluCounter, 3075 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2795 SdHoareTripleChecker+Valid, 4833 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:41:30,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2795 Valid, 4833 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 11:41:30,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2059 states. [2022-11-16 11:41:30,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2059 to 1166. [2022-11-16 11:41:30,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1166 states, 1165 states have (on average 1.6600858369098712) internal successors, (1934), 1165 states have internal predecessors, (1934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:30,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1166 states to 1166 states and 1934 transitions. [2022-11-16 11:41:30,308 INFO L78 Accepts]: Start accepts. Automaton has 1166 states and 1934 transitions. Word has length 779 [2022-11-16 11:41:30,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:41:30,309 INFO L495 AbstractCegarLoop]: Abstraction has 1166 states and 1934 transitions. [2022-11-16 11:41:30,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 155.8) internal successors, (779), 5 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:30,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1166 states and 1934 transitions. [2022-11-16 11:41:30,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 781 [2022-11-16 11:41:30,335 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:41:30,336 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:41:30,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:41:30,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:41:30,559 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:41:30,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:41:30,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1536636276, now seen corresponding path program 1 times [2022-11-16 11:41:30,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:41:30,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850113959] [2022-11-16 11:41:30,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:30,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:41:31,061 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:41:31,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [728974349] [2022-11-16 11:41:31,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:31,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:41:31,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:41:31,067 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:41:31,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:41:33,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:41:33,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 6549 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 11:41:33,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:41:33,923 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 178 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:41:33,924 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:41:33,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:41:33,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850113959] [2022-11-16 11:41:33,924 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:41:33,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728974349] [2022-11-16 11:41:33,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728974349] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:41:33,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:41:33,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:41:33,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757141426] [2022-11-16 11:41:33,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:41:33,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:41:33,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:41:33,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:41:33,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:41:33,929 INFO L87 Difference]: Start difference. First operand 1166 states and 1934 transitions. Second operand has 6 states, 6 states have (on average 130.0) internal successors, (780), 6 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:34,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:41:34,919 INFO L93 Difference]: Finished difference Result 3866 states and 6412 transitions. [2022-11-16 11:41:34,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:41:34,920 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 130.0) internal successors, (780), 6 states have internal predecessors, (780), 0 states have call successors, (0), 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 780 [2022-11-16 11:41:34,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:41:34,931 INFO L225 Difference]: With dead ends: 3866 [2022-11-16 11:41:34,931 INFO L226 Difference]: Without dead ends: 2965 [2022-11-16 11:41:34,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 781 GetRequests, 775 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:41:34,935 INFO L413 NwaCegarLoop]: 1772 mSDtfsCounter, 7976 mSDsluCounter, 3090 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7976 SdHoareTripleChecker+Valid, 4862 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:41:34,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7976 Valid, 4862 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 11:41:34,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2965 states. [2022-11-16 11:41:34,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2965 to 1168. [2022-11-16 11:41:34,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 1.658954584404456) internal successors, (1936), 1167 states have internal predecessors, (1936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:34,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 1936 transitions. [2022-11-16 11:41:34,983 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 1936 transitions. Word has length 780 [2022-11-16 11:41:34,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:41:34,983 INFO L495 AbstractCegarLoop]: Abstraction has 1168 states and 1936 transitions. [2022-11-16 11:41:34,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 130.0) internal successors, (780), 6 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:34,984 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 1936 transitions. [2022-11-16 11:41:35,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 782 [2022-11-16 11:41:35,009 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:41:35,010 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:41:35,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-16 11:41:35,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:41:35,224 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:41:35,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:41:35,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1919781266, now seen corresponding path program 1 times [2022-11-16 11:41:35,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:41:35,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351907332] [2022-11-16 11:41:35,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:35,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:41:35,665 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:41:35,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1661903025] [2022-11-16 11:41:35,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:35,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:41:35,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:41:35,667 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:41:35,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:41:38,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:41:38,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 6552 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 11:41:38,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:41:39,071 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 178 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:41:39,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:41:39,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:41:39,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351907332] [2022-11-16 11:41:39,075 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:41:39,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661903025] [2022-11-16 11:41:39,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661903025] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:41:39,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:41:39,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:41:39,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678275042] [2022-11-16 11:41:39,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:41:39,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:41:39,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:41:39,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:41:39,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:41:39,086 INFO L87 Difference]: Start difference. First operand 1168 states and 1936 transitions. Second operand has 5 states, 5 states have (on average 156.2) internal successors, (781), 5 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:39,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:41:39,875 INFO L93 Difference]: Finished difference Result 2968 states and 4921 transitions. [2022-11-16 11:41:39,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:41:39,877 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 156.2) internal successors, (781), 5 states have internal predecessors, (781), 0 states have call successors, (0), 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 781 [2022-11-16 11:41:39,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:41:39,884 INFO L225 Difference]: With dead ends: 2968 [2022-11-16 11:41:39,884 INFO L226 Difference]: Without dead ends: 2065 [2022-11-16 11:41:39,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 781 GetRequests, 777 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:41:39,886 INFO L413 NwaCegarLoop]: 1773 mSDtfsCounter, 3802 mSDsluCounter, 3089 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3802 SdHoareTripleChecker+Valid, 4862 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:41:39,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3802 Valid, 4862 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 11:41:39,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2065 states. [2022-11-16 11:41:39,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2065 to 1169. [2022-11-16 11:41:39,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1169 states, 1168 states have (on average 1.658390410958904) internal successors, (1937), 1168 states have internal predecessors, (1937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:39,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1169 states to 1169 states and 1937 transitions. [2022-11-16 11:41:39,921 INFO L78 Accepts]: Start accepts. Automaton has 1169 states and 1937 transitions. Word has length 781 [2022-11-16 11:41:39,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:41:39,922 INFO L495 AbstractCegarLoop]: Abstraction has 1169 states and 1937 transitions. [2022-11-16 11:41:39,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 156.2) internal successors, (781), 5 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:39,923 INFO L276 IsEmpty]: Start isEmpty. Operand 1169 states and 1937 transitions. [2022-11-16 11:41:39,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 782 [2022-11-16 11:41:39,929 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:41:39,930 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:41:39,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:41:40,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:41:40,143 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:41:40,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:41:40,144 INFO L85 PathProgramCache]: Analyzing trace with hash 317515948, now seen corresponding path program 1 times [2022-11-16 11:41:40,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:41:40,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130944570] [2022-11-16 11:41:40,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:40,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:41:40,575 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:41:40,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1996419136] [2022-11-16 11:41:40,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:40,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:41:40,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:41:40,577 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:41:40,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:41:42,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:41:42,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 6552 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 11:41:43,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:41:43,499 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 178 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:41:43,500 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:41:43,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:41:43,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130944570] [2022-11-16 11:41:43,500 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:41:43,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996419136] [2022-11-16 11:41:43,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996419136] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:41:43,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:41:43,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:41:43,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071946032] [2022-11-16 11:41:43,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:41:43,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:41:43,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:41:43,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:41:43,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:41:43,504 INFO L87 Difference]: Start difference. First operand 1169 states and 1937 transitions. Second operand has 6 states, 6 states have (on average 130.16666666666666) internal successors, (781), 6 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:44,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:41:44,498 INFO L93 Difference]: Finished difference Result 3878 states and 6424 transitions. [2022-11-16 11:41:44,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:41:44,500 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 130.16666666666666) internal successors, (781), 6 states have internal predecessors, (781), 0 states have call successors, (0), 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 781 [2022-11-16 11:41:44,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:41:44,509 INFO L225 Difference]: With dead ends: 3878 [2022-11-16 11:41:44,509 INFO L226 Difference]: Without dead ends: 2974 [2022-11-16 11:41:44,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 782 GetRequests, 776 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:41:44,512 INFO L413 NwaCegarLoop]: 1775 mSDtfsCounter, 9239 mSDsluCounter, 3092 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9239 SdHoareTripleChecker+Valid, 4867 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:41:44,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9239 Valid, 4867 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 11:41:44,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2974 states. [2022-11-16 11:41:44,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2974 to 1171. [2022-11-16 11:41:44,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1171 states, 1170 states have (on average 1.6572649572649574) internal successors, (1939), 1170 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:44,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 1939 transitions. [2022-11-16 11:41:44,560 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 1939 transitions. Word has length 781 [2022-11-16 11:41:44,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:41:44,561 INFO L495 AbstractCegarLoop]: Abstraction has 1171 states and 1939 transitions. [2022-11-16 11:41:44,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 130.16666666666666) internal successors, (781), 6 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:44,561 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 1939 transitions. [2022-11-16 11:41:44,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 783 [2022-11-16 11:41:44,573 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:41:44,573 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:41:44,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:41:44,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-16 11:41:44,796 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:41:44,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:41:44,796 INFO L85 PathProgramCache]: Analyzing trace with hash -530086716, now seen corresponding path program 1 times [2022-11-16 11:41:44,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:41:44,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900505014] [2022-11-16 11:41:44,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:44,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:41:45,252 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:41:45,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1298194401] [2022-11-16 11:41:45,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:45,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:41:45,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:41:45,254 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:41:45,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:41:47,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:41:47,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 6555 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 11:41:47,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:41:48,757 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 178 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:41:48,758 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:41:48,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:41:48,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900505014] [2022-11-16 11:41:48,758 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:41:48,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298194401] [2022-11-16 11:41:48,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298194401] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:41:48,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:41:48,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:41:48,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948069123] [2022-11-16 11:41:48,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:41:48,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:41:48,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:41:48,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:41:48,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:41:48,767 INFO L87 Difference]: Start difference. First operand 1171 states and 1939 transitions. Second operand has 5 states, 5 states have (on average 156.4) internal successors, (782), 5 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:49,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:41:49,566 INFO L93 Difference]: Finished difference Result 2977 states and 4930 transitions. [2022-11-16 11:41:49,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:41:49,568 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 156.4) internal successors, (782), 5 states have internal predecessors, (782), 0 states have call successors, (0), 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 782 [2022-11-16 11:41:49,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:41:49,574 INFO L225 Difference]: With dead ends: 2977 [2022-11-16 11:41:49,575 INFO L226 Difference]: Without dead ends: 2071 [2022-11-16 11:41:49,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 782 GetRequests, 778 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:41:49,579 INFO L413 NwaCegarLoop]: 1778 mSDtfsCounter, 2776 mSDsluCounter, 3093 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2776 SdHoareTripleChecker+Valid, 4871 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:41:49,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2776 Valid, 4871 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 11:41:49,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2022-11-16 11:41:49,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 1172. [2022-11-16 11:41:49,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1172 states, 1171 states have (on average 1.6567036720751493) internal successors, (1940), 1171 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:49,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1172 states to 1172 states and 1940 transitions. [2022-11-16 11:41:49,615 INFO L78 Accepts]: Start accepts. Automaton has 1172 states and 1940 transitions. Word has length 782 [2022-11-16 11:41:49,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:41:49,616 INFO L495 AbstractCegarLoop]: Abstraction has 1172 states and 1940 transitions. [2022-11-16 11:41:49,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 156.4) internal successors, (782), 5 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:49,617 INFO L276 IsEmpty]: Start isEmpty. Operand 1172 states and 1940 transitions. [2022-11-16 11:41:49,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 783 [2022-11-16 11:41:49,623 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:41:49,623 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:41:49,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:41:49,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-16 11:41:49,841 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:41:49,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:41:49,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1310457218, now seen corresponding path program 1 times [2022-11-16 11:41:49,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:41:49,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051286838] [2022-11-16 11:41:49,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:49,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:41:50,228 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:41:50,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1965026377] [2022-11-16 11:41:50,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:50,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:41:50,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:41:50,231 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:41:50,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 11:41:52,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:41:52,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 6555 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 11:41:52,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:41:53,353 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 178 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:41:53,353 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:41:53,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:41:53,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051286838] [2022-11-16 11:41:53,353 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:41:53,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965026377] [2022-11-16 11:41:53,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965026377] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:41:53,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:41:53,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:41:53,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454461431] [2022-11-16 11:41:53,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:41:53,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:41:53,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:41:53,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:41:53,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:41:53,357 INFO L87 Difference]: Start difference. First operand 1172 states and 1940 transitions. Second operand has 6 states, 6 states have (on average 130.33333333333334) internal successors, (782), 6 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:54,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:41:54,293 INFO L93 Difference]: Finished difference Result 3890 states and 6436 transitions. [2022-11-16 11:41:54,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:41:54,294 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 130.33333333333334) internal successors, (782), 6 states have internal predecessors, (782), 0 states have call successors, (0), 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 782 [2022-11-16 11:41:54,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:41:54,304 INFO L225 Difference]: With dead ends: 3890 [2022-11-16 11:41:54,304 INFO L226 Difference]: Without dead ends: 2983 [2022-11-16 11:41:54,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 783 GetRequests, 777 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:41:54,307 INFO L413 NwaCegarLoop]: 1797 mSDtfsCounter, 7876 mSDsluCounter, 3115 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7876 SdHoareTripleChecker+Valid, 4912 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:41:54,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7876 Valid, 4912 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 11:41:54,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2983 states. [2022-11-16 11:41:54,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2983 to 1174. [2022-11-16 11:41:54,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1174 states, 1173 states have (on average 1.6555839727195225) internal successors, (1942), 1173 states have internal predecessors, (1942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:54,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 1942 transitions. [2022-11-16 11:41:54,343 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 1942 transitions. Word has length 782 [2022-11-16 11:41:54,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:41:54,344 INFO L495 AbstractCegarLoop]: Abstraction has 1174 states and 1942 transitions. [2022-11-16 11:41:54,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 130.33333333333334) internal successors, (782), 6 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:54,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 1942 transitions. [2022-11-16 11:41:54,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 784 [2022-11-16 11:41:54,351 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:41:54,352 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:41:54,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 11:41:54,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:41:54,567 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:41:54,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:41:54,568 INFO L85 PathProgramCache]: Analyzing trace with hash 390136868, now seen corresponding path program 1 times [2022-11-16 11:41:54,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:41:54,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842487034] [2022-11-16 11:41:54,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:54,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:41:54,969 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:41:54,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [329399432] [2022-11-16 11:41:54,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:54,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:41:54,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:41:54,971 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:41:54,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 11:41:57,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:41:57,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 6558 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 11:41:57,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:41:58,618 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 178 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:41:58,618 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:41:58,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:41:58,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842487034] [2022-11-16 11:41:58,619 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:41:58,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329399432] [2022-11-16 11:41:58,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329399432] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:41:58,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:41:58,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:41:58,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903334763] [2022-11-16 11:41:58,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:41:58,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:41:58,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:41:58,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:41:58,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:41:58,623 INFO L87 Difference]: Start difference. First operand 1174 states and 1942 transitions. Second operand has 5 states, 5 states have (on average 156.6) internal successors, (783), 5 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:59,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:41:59,445 INFO L93 Difference]: Finished difference Result 2986 states and 4939 transitions. [2022-11-16 11:41:59,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:41:59,446 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 156.6) internal successors, (783), 5 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 783 [2022-11-16 11:41:59,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:41:59,454 INFO L225 Difference]: With dead ends: 2986 [2022-11-16 11:41:59,454 INFO L226 Difference]: Without dead ends: 2077 [2022-11-16 11:41:59,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 783 GetRequests, 779 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:41:59,456 INFO L413 NwaCegarLoop]: 1798 mSDtfsCounter, 3730 mSDsluCounter, 3114 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3730 SdHoareTripleChecker+Valid, 4912 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:41:59,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3730 Valid, 4912 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 11:41:59,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2077 states. [2022-11-16 11:41:59,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2077 to 1175. [2022-11-16 11:41:59,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1175 states, 1174 states have (on average 1.6550255536626917) internal successors, (1943), 1174 states have internal predecessors, (1943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:59,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1175 states to 1175 states and 1943 transitions. [2022-11-16 11:41:59,487 INFO L78 Accepts]: Start accepts. Automaton has 1175 states and 1943 transitions. Word has length 783 [2022-11-16 11:41:59,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:41:59,488 INFO L495 AbstractCegarLoop]: Abstraction has 1175 states and 1943 transitions. [2022-11-16 11:41:59,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 156.6) internal successors, (783), 5 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:59,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1175 states and 1943 transitions. [2022-11-16 11:41:59,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 784 [2022-11-16 11:41:59,495 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:41:59,495 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:41:59,522 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-16 11:41:59,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:41:59,720 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:41:59,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:41:59,721 INFO L85 PathProgramCache]: Analyzing trace with hash 758153570, now seen corresponding path program 1 times [2022-11-16 11:41:59,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:41:59,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592918903] [2022-11-16 11:41:59,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:59,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:42:00,043 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:42:00,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [156490905] [2022-11-16 11:42:00,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:00,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:42:00,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:42:00,045 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:42:00,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 11:42:02,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:02,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 6558 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 11:42:02,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:42:03,132 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 178 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:03,132 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:42:03,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:42:03,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592918903] [2022-11-16 11:42:03,133 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:42:03,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156490905] [2022-11-16 11:42:03,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156490905] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:42:03,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:42:03,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:42:03,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992795425] [2022-11-16 11:42:03,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:42:03,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:42:03,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:42:03,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:42:03,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:42:03,136 INFO L87 Difference]: Start difference. First operand 1175 states and 1943 transitions. Second operand has 6 states, 6 states have (on average 130.5) internal successors, (783), 6 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:04,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:04,068 INFO L93 Difference]: Finished difference Result 3902 states and 6448 transitions. [2022-11-16 11:42:04,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:42:04,068 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 130.5) internal successors, (783), 6 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 783 [2022-11-16 11:42:04,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:04,078 INFO L225 Difference]: With dead ends: 3902 [2022-11-16 11:42:04,079 INFO L226 Difference]: Without dead ends: 2992 [2022-11-16 11:42:04,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 784 GetRequests, 778 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:42:04,081 INFO L413 NwaCegarLoop]: 2636 mSDtfsCounter, 7219 mSDsluCounter, 3952 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7219 SdHoareTripleChecker+Valid, 6588 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:04,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7219 Valid, 6588 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 860 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 11:42:04,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2992 states. [2022-11-16 11:42:04,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2992 to 1177. [2022-11-16 11:42:04,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1177 states, 1176 states have (on average 1.6539115646258504) internal successors, (1945), 1176 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:04,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 1945 transitions. [2022-11-16 11:42:04,115 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 1945 transitions. Word has length 783 [2022-11-16 11:42:04,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:04,115 INFO L495 AbstractCegarLoop]: Abstraction has 1177 states and 1945 transitions. [2022-11-16 11:42:04,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 130.5) internal successors, (783), 6 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:04,116 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 1945 transitions. [2022-11-16 11:42:04,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 785 [2022-11-16 11:42:04,123 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:04,123 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:42:04,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 11:42:04,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 11:42:04,332 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:42:04,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:04,333 INFO L85 PathProgramCache]: Analyzing trace with hash -2068143752, now seen corresponding path program 1 times [2022-11-16 11:42:04,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:42:04,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710877622] [2022-11-16 11:42:04,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:04,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:42:04,652 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:42:04,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [765482031] [2022-11-16 11:42:04,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:04,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:42:04,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:42:04,655 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:42:04,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 11:42:07,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:07,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 6561 conjuncts, 95 conjunts are in the unsatisfiable core [2022-11-16 11:42:07,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:42:12,405 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 2 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:12,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:42:17,843 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2022-11-16 11:42:17,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:42:17,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710877622] [2022-11-16 11:42:17,844 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:42:17,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765482031] [2022-11-16 11:42:17,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765482031] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:42:17,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:42:17,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2022-11-16 11:42:17,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323773712] [2022-11-16 11:42:17,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:42:17,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:42:17,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:42:17,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:42:17,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:42:17,848 INFO L87 Difference]: Start difference. First operand 1177 states and 1945 transitions. Second operand has 5 states, 5 states have (on average 122.2) internal successors, (611), 5 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:23,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:42:25,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:25,242 INFO L93 Difference]: Finished difference Result 6143 states and 10004 transitions. [2022-11-16 11:42:25,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:42:25,243 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 122.2) internal successors, (611), 5 states have internal predecessors, (611), 0 states have call successors, (0), 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 784 [2022-11-16 11:42:25,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:25,254 INFO L225 Difference]: With dead ends: 6143 [2022-11-16 11:42:25,255 INFO L226 Difference]: Without dead ends: 5231 [2022-11-16 11:42:25,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1570 GetRequests, 1558 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:42:25,258 INFO L413 NwaCegarLoop]: 1600 mSDtfsCounter, 8412 mSDsluCounter, 2645 mSDsCounter, 0 mSdLazyCounter, 4387 mSolverCounterSat, 449 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8412 SdHoareTripleChecker+Valid, 4245 SdHoareTripleChecker+Invalid, 4836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 449 IncrementalHoareTripleChecker+Valid, 4387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:25,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8412 Valid, 4245 Invalid, 4836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [449 Valid, 4387 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2022-11-16 11:42:25,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5231 states. [2022-11-16 11:42:25,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5231 to 1180. [2022-11-16 11:42:25,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 1.6530958439355385) internal successors, (1949), 1179 states have internal predecessors, (1949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:25,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 1949 transitions. [2022-11-16 11:42:25,311 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 1949 transitions. Word has length 784 [2022-11-16 11:42:25,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:25,312 INFO L495 AbstractCegarLoop]: Abstraction has 1180 states and 1949 transitions. [2022-11-16 11:42:25,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 122.2) internal successors, (611), 5 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:25,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 1949 transitions. [2022-11-16 11:42:25,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 785 [2022-11-16 11:42:25,324 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:25,325 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:42:25,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 11:42:25,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:42:25,552 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:42:25,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:25,552 INFO L85 PathProgramCache]: Analyzing trace with hash -2068084170, now seen corresponding path program 1 times [2022-11-16 11:42:25,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:42:25,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436204888] [2022-11-16 11:42:25,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:25,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:42:25,917 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:42:25,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1630352812] [2022-11-16 11:42:25,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:25,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:42:25,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:42:25,919 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:42:25,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 11:42:28,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:28,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 6561 conjuncts, 91 conjunts are in the unsatisfiable core [2022-11-16 11:42:28,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:42:31,511 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 2 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:31,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:42:34,171 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2022-11-16 11:42:34,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:42:34,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436204888] [2022-11-16 11:42:34,172 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:42:34,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630352812] [2022-11-16 11:42:34,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630352812] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:42:34,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:42:34,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 9 [2022-11-16 11:42:34,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681456494] [2022-11-16 11:42:34,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:42:34,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:42:34,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:42:34,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:42:34,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:42:34,175 INFO L87 Difference]: Start difference. First operand 1180 states and 1949 transitions. Second operand has 4 states, 4 states have (on average 152.75) internal successors, (611), 4 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:36,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:36,140 INFO L93 Difference]: Finished difference Result 3904 states and 6450 transitions. [2022-11-16 11:42:36,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:42:36,141 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 152.75) internal successors, (611), 4 states have internal predecessors, (611), 0 states have call successors, (0), 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 784 [2022-11-16 11:42:36,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:36,148 INFO L225 Difference]: With dead ends: 3904 [2022-11-16 11:42:36,148 INFO L226 Difference]: Without dead ends: 2989 [2022-11-16 11:42:36,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1568 GetRequests, 1560 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:42:36,151 INFO L413 NwaCegarLoop]: 1924 mSDtfsCounter, 4442 mSDsluCounter, 3399 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4442 SdHoareTripleChecker+Valid, 5323 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:36,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4442 Valid, 5323 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-16 11:42:36,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2989 states. [2022-11-16 11:42:36,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2989 to 1177. [2022-11-16 11:42:36,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1177 states, 1176 states have (on average 1.6539115646258504) internal successors, (1945), 1176 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:36,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 1945 transitions. [2022-11-16 11:42:36,182 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 1945 transitions. Word has length 784 [2022-11-16 11:42:36,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:36,184 INFO L495 AbstractCegarLoop]: Abstraction has 1177 states and 1945 transitions. [2022-11-16 11:42:36,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 152.75) internal successors, (611), 4 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:36,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 1945 transitions. [2022-11-16 11:42:36,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 786 [2022-11-16 11:42:36,191 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:36,191 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:42:36,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 11:42:36,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 11:42:36,419 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:42:36,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:36,420 INFO L85 PathProgramCache]: Analyzing trace with hash 101621718, now seen corresponding path program 1 times [2022-11-16 11:42:36,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:42:36,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958948382] [2022-11-16 11:42:36,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:36,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:42:36,730 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:42:36,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1025003721] [2022-11-16 11:42:36,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:36,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:42:36,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:42:36,732 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:42:36,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 11:42:39,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:39,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 6564 conjuncts, 99 conjunts are in the unsatisfiable core [2022-11-16 11:42:39,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:42:43,903 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 2 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:43,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:42:53,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:42:53,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958948382] [2022-11-16 11:42:53,039 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:42:53,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025003721] [2022-11-16 11:42:53,039 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-11-16 11:42:53,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 11:42:53,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 11:42:53,240 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Maybe an infinite loop at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:130) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:345) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:65) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:90) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:399) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:342) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) 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.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 11:42:53,244 INFO L158 Benchmark]: Toolchain (without parser) took 103169.10ms. Allocated memory was 115.3MB in the beginning and 1.8GB in the end (delta: 1.7GB). Free memory was 90.0MB in the beginning and 801.4MB in the end (delta: -711.4MB). Peak memory consumption was 988.4MB. Max. memory is 16.1GB. [2022-11-16 11:42:53,244 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 90.2MB. Free memory is still 68.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 11:42:53,245 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1198.54ms. Allocated memory is still 115.3MB. Free memory was 89.6MB in the beginning and 54.1MB in the end (delta: 35.6MB). Peak memory consumption was 52.0MB. Max. memory is 16.1GB. [2022-11-16 11:42:53,245 INFO L158 Benchmark]: Boogie Procedure Inliner took 347.55ms. Allocated memory was 115.3MB in the beginning and 186.6MB in the end (delta: 71.3MB). Free memory was 54.1MB in the beginning and 100.9MB in the end (delta: -46.8MB). Peak memory consumption was 24.7MB. Max. memory is 16.1GB. [2022-11-16 11:42:53,245 INFO L158 Benchmark]: Boogie Preprocessor took 341.52ms. Allocated memory is still 186.6MB. Free memory was 100.9MB in the beginning and 103.4MB in the end (delta: -2.5MB). Peak memory consumption was 41.2MB. Max. memory is 16.1GB. [2022-11-16 11:42:53,246 INFO L158 Benchmark]: RCFGBuilder took 6725.71ms. Allocated memory was 186.6MB in the beginning and 515.9MB in the end (delta: 329.3MB). Free memory was 103.4MB in the beginning and 292.4MB in the end (delta: -189.0MB). Peak memory consumption was 225.5MB. Max. memory is 16.1GB. [2022-11-16 11:42:53,246 INFO L158 Benchmark]: TraceAbstraction took 94546.86ms. Allocated memory was 515.9MB in the beginning and 1.8GB in the end (delta: 1.3GB). Free memory was 292.4MB in the beginning and 801.4MB in the end (delta: -509.0MB). Peak memory consumption was 790.2MB. Max. memory is 16.1GB. [2022-11-16 11:42:53,248 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 90.2MB. Free memory is still 68.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1198.54ms. Allocated memory is still 115.3MB. Free memory was 89.6MB in the beginning and 54.1MB in the end (delta: 35.6MB). Peak memory consumption was 52.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 347.55ms. Allocated memory was 115.3MB in the beginning and 186.6MB in the end (delta: 71.3MB). Free memory was 54.1MB in the beginning and 100.9MB in the end (delta: -46.8MB). Peak memory consumption was 24.7MB. Max. memory is 16.1GB. * Boogie Preprocessor took 341.52ms. Allocated memory is still 186.6MB. Free memory was 100.9MB in the beginning and 103.4MB in the end (delta: -2.5MB). Peak memory consumption was 41.2MB. Max. memory is 16.1GB. * RCFGBuilder took 6725.71ms. Allocated memory was 186.6MB in the beginning and 515.9MB in the end (delta: 329.3MB). Free memory was 103.4MB in the beginning and 292.4MB in the end (delta: -189.0MB). Peak memory consumption was 225.5MB. Max. memory is 16.1GB. * TraceAbstraction took 94546.86ms. Allocated memory was 515.9MB in the beginning and 1.8GB in the end (delta: 1.3GB). Free memory was 292.4MB in the beginning and 801.4MB in the end (delta: -509.0MB). Peak memory consumption was 790.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Maybe an infinite loop de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Maybe an infinite loop: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:130) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-11-16 11:42:53,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp2.5.prop1-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-64bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash af1b351254fcfd6e7ac8c55f8a193390f7b767b78e2e14e72e25b1d160c14d6a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 11:42:55,598 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:42:55,601 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:42:55,636 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:42:55,637 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:42:55,641 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:42:55,643 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:42:55,649 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:42:55,651 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:42:55,657 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:42:55,658 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:42:55,660 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:42:55,661 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:42:55,663 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:42:55,665 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:42:55,670 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:42:55,672 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:42:55,673 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:42:55,675 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:42:55,680 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:42:55,684 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:42:55,686 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:42:55,688 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:42:55,689 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:42:55,695 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:42:55,700 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:42:55,700 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:42:55,701 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:42:55,703 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:42:55,704 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:42:55,704 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:42:55,705 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:42:55,707 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:42:55,708 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:42:55,709 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:42:55,709 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:42:55,710 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:42:55,711 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:42:55,711 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:42:55,713 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:42:55,714 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:42:55,719 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-11-16 11:42:55,766 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:42:55,766 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:42:55,767 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:42:55,768 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:42:55,768 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:42:55,769 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:42:55,770 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:42:55,770 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:42:55,770 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:42:55,771 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:42:55,772 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:42:55,772 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:42:55,772 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:42:55,772 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:42:55,773 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 11:42:55,773 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-16 11:42:55,773 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-16 11:42:55,773 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:42:55,773 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:42:55,774 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:42:55,774 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:42:55,774 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:42:55,774 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:42:55,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:42:55,775 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:42:55,775 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:42:55,776 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:42:55,776 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-16 11:42:55,776 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-16 11:42:55,776 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:42:55,776 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:42:55,777 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:42:55,777 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-16 11:42:55,777 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> af1b351254fcfd6e7ac8c55f8a193390f7b767b78e2e14e72e25b1d160c14d6a [2022-11-16 11:42:56,165 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:42:56,186 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:42:56,189 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:42:56,190 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:42:56,191 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:42:56,192 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp2.5.prop1-back-serstep.c [2022-11-16 11:42:56,254 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/data/050105b1d/092bd15c889442c7be1312292132e661/FLAGa19650c45 [2022-11-16 11:42:56,901 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:42:56,901 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp2.5.prop1-back-serstep.c [2022-11-16 11:42:56,930 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/data/050105b1d/092bd15c889442c7be1312292132e661/FLAGa19650c45 [2022-11-16 11:42:57,084 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/data/050105b1d/092bd15c889442c7be1312292132e661 [2022-11-16 11:42:57,087 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:42:57,089 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:42:57,092 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:42:57,092 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:42:57,096 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:42:57,096 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:42:57" (1/1) ... [2022-11-16 11:42:57,098 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@171d0731 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:42:57, skipping insertion in model container [2022-11-16 11:42:57,098 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:42:57" (1/1) ... [2022-11-16 11:42:57,105 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:42:57,214 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:42:57,411 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp2.5.prop1-back-serstep.c[1014,1027] [2022-11-16 11:42:57,901 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:42:57,905 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:42:57,919 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp2.5.prop1-back-serstep.c[1014,1027] [2022-11-16 11:42:58,163 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:42:58,176 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:42:58,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:42:58 WrapperNode [2022-11-16 11:42:58,177 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:42:58,178 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:42:58,179 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:42:58,179 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:42:58,186 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:42:58" (1/1) ... [2022-11-16 11:42:58,285 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:42:58" (1/1) ... [2022-11-16 11:42:58,412 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 3190 [2022-11-16 11:42:58,412 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:42:58,413 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:42:58,413 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:42:58,413 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:42:58,422 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:42:58" (1/1) ... [2022-11-16 11:42:58,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:42:58" (1/1) ... [2022-11-16 11:42:58,442 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:42:58" (1/1) ... [2022-11-16 11:42:58,443 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:42:58" (1/1) ... [2022-11-16 11:42:58,532 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:42:58" (1/1) ... [2022-11-16 11:42:58,550 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:42:58" (1/1) ... [2022-11-16 11:42:58,566 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:42:58" (1/1) ... [2022-11-16 11:42:58,584 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:42:58" (1/1) ... [2022-11-16 11:42:58,612 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:42:58,614 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:42:58,615 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:42:58,615 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:42:58,616 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:42:58" (1/1) ... [2022-11-16 11:42:58,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:42:58,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:42:58,648 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:42:58,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:42:58,700 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:42:58,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:42:59,352 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:42:59,354 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:43:07,526 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:43:07,533 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:43:07,533 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-16 11:43:07,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:43:07 BoogieIcfgContainer [2022-11-16 11:43:07,535 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:43:07,537 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:43:07,537 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:43:07,540 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:43:07,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:42:57" (1/3) ... [2022-11-16 11:43:07,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@772dbad7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:43:07, skipping insertion in model container [2022-11-16 11:43:07,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:42:58" (2/3) ... [2022-11-16 11:43:07,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@772dbad7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:43:07, skipping insertion in model container [2022-11-16 11:43:07,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:43:07" (3/3) ... [2022-11-16 11:43:07,543 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.brp2.5.prop1-back-serstep.c [2022-11-16 11:43:07,561 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:43:07,561 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:43:07,616 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:43:07,624 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5bb40abc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:43:07,624 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 11:43:07,628 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:43:07,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 11:43:07,635 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:43:07,636 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 11:43:07,637 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:43:07,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:43:07,642 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-16 11:43:07,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:43:07,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2128963120] [2022-11-16 11:43:07,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:07,658 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:43:07,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:43:07,667 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:43:07,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-16 11:43:08,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:08,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 11:43:08,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:43:08,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:43:08,619 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:43:08,621 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:43:08,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2128963120] [2022-11-16 11:43:08,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2128963120] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:43:08,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:43:08,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:43:08,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248323057] [2022-11-16 11:43:08,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:43:08,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:43:08,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:43:08,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:43:08,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:43:08,682 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 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 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:43:09,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:43:09,374 INFO L93 Difference]: Finished difference Result 20 states and 30 transitions. [2022-11-16 11:43:09,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:43:09,376 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2022-11-16 11:43:09,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:43:09,383 INFO L225 Difference]: With dead ends: 20 [2022-11-16 11:43:09,383 INFO L226 Difference]: Without dead ends: 11 [2022-11-16 11:43:09,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:43:09,391 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:43:09,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 13 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 11:43:09,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-16 11:43:09,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 9. [2022-11-16 11:43:09,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 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) [2022-11-16 11:43:09,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2022-11-16 11:43:09,421 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2022-11-16 11:43:09,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:43:09,422 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2022-11-16 11:43:09,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:43:09,422 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2022-11-16 11:43:09,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 11:43:09,423 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:43:09,423 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-16 11:43:09,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:43:09,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:43:09,652 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:43:09,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:43:09,653 INFO L85 PathProgramCache]: Analyzing trace with hash 271073635, now seen corresponding path program 1 times [2022-11-16 11:43:09,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:43:09,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1115683945] [2022-11-16 11:43:09,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:09,658 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:43:09,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:43:09,660 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:43:09,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-16 11:43:11,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:11,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 2862 conjuncts, 104 conjunts are in the unsatisfiable core [2022-11-16 11:43:11,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:43:12,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:43:12,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:43:14,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:43:14,293 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:43:14,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1115683945] [2022-11-16 11:43:14,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1115683945] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:43:14,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:43:14,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-11-16 11:43:14,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924020351] [2022-11-16 11:43:14,294 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:43:14,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:43:14,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:43:14,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:43:14,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:43:14,297 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 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) [2022-11-16 11:43:17,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:43:17,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:43:17,105 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2022-11-16 11:43:17,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:43:17,106 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 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 8 [2022-11-16 11:43:17,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:43:17,106 INFO L225 Difference]: With dead ends: 16 [2022-11-16 11:43:17,106 INFO L226 Difference]: Without dead ends: 14 [2022-11-16 11:43:17,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:43:17,108 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:43:17,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 24 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 1 Unknown, 11 Unchecked, 2.6s Time] [2022-11-16 11:43:17,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-16 11:43:17,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 12. [2022-11-16 11:43:17,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:43:17,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2022-11-16 11:43:17,112 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 8 [2022-11-16 11:43:17,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:43:17,113 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2022-11-16 11:43:17,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 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) [2022-11-16 11:43:17,113 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2022-11-16 11:43:17,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:43:17,114 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:43:17,114 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-16 11:43:17,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:43:17,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:43:17,327 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:43:17,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:43:17,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1020920393, now seen corresponding path program 2 times [2022-11-16 11:43:17,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:43:17,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1300849774] [2022-11-16 11:43:17,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:43:17,334 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:43:17,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:43:17,335 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:43:17,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac64aa8b-9e1d-4dff-bb71-ba438bd76bad/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-16 11:43:20,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:43:20,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:43:20,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 5336 conjuncts, 294 conjunts are in the unsatisfiable core [2022-11-16 11:43:20,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:03,363 WARN L233 SmtUtils]: Spent 34.59s on a formula simplification. DAG size of input: 1405 DAG size of output: 1401 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:44:05,418 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:05,419 INFO L328 TraceCheckSpWp]: Computing backward predicates...