/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 23:05:22,818 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 23:05:22,822 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 23:05:22,881 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 23:05:22,882 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 23:05:22,885 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 23:05:22,889 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 23:05:22,896 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 23:05:22,899 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 23:05:22,905 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 23:05:22,907 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 23:05:22,908 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 23:05:22,908 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 23:05:22,911 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 23:05:22,913 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 23:05:22,915 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 23:05:22,916 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 23:05:22,921 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 23:05:22,937 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 23:05:22,940 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 23:05:22,942 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 23:05:22,943 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 23:05:22,945 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 23:05:22,946 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 23:05:22,949 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 23:05:22,958 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 23:05:22,959 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 23:05:22,960 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 23:05:22,961 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-06 23:05:22,989 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 23:05:22,989 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 23:05:22,991 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 23:05:22,991 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 23:05:22,991 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 23:05:22,991 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 23:05:22,992 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 23:05:22,992 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 23:05:22,992 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 23:05:22,992 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 23:05:22,992 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 23:05:22,993 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 23:05:22,993 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 23:05:22,993 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 23:05:22,993 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 23:05:22,993 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 23:05:22,994 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 23:05:22,994 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 23:05:22,994 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 23:05:22,994 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 23:05:22,994 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 23:05:22,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 23:05:22,995 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 23:05:22,995 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 23:05:22,995 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 23:05:22,996 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 23:05:22,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 23:05:22,996 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 23:05:22,996 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 23:05:22,996 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 23:05:23,344 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 23:05:23,373 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 23:05:23,376 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 23:05:23,377 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 23:05:23,378 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 23:05:23,379 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-11-06 23:05:23,472 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ddc285f3/e56defc0a83a47faafab1e26031d706a/FLAG2a49b6b7e [2020-11-06 23:05:24,492 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 23:05:24,493 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-11-06 23:05:24,517 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ddc285f3/e56defc0a83a47faafab1e26031d706a/FLAG2a49b6b7e [2020-11-06 23:05:25,029 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ddc285f3/e56defc0a83a47faafab1e26031d706a [2020-11-06 23:05:25,032 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 23:05:25,038 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 23:05:25,040 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 23:05:25,041 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 23:05:25,044 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 23:05:25,045 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:05:25" (1/1) ... [2020-11-06 23:05:25,049 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1001039f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:25, skipping insertion in model container [2020-11-06 23:05:25,049 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:05:25" (1/1) ... [2020-11-06 23:05:25,061 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 23:05:25,238 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 23:05:26,966 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 23:05:27,000 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 23:05:28,001 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 23:05:28,028 INFO L208 MainTranslator]: Completed translation [2020-11-06 23:05:28,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:28 WrapperNode [2020-11-06 23:05:28,029 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 23:05:28,030 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 23:05:28,030 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 23:05:28,031 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 23:05:28,044 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:28" (1/1) ... [2020-11-06 23:05:28,045 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:28" (1/1) ... [2020-11-06 23:05:28,085 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:28" (1/1) ... [2020-11-06 23:05:28,086 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:28" (1/1) ... [2020-11-06 23:05:28,189 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:28" (1/1) ... [2020-11-06 23:05:28,251 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:28" (1/1) ... [2020-11-06 23:05:28,271 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:28" (1/1) ... [2020-11-06 23:05:28,297 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 23:05:28,298 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 23:05:28,298 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 23:05:28,298 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 23:05:28,299 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:28" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 23:05:28,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 23:05:28,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 23:05:28,378 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 23:05:28,378 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-06 23:05:28,378 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 23:05:28,378 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 23:05:28,378 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 23:05:28,379 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 23:05:28,379 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 23:05:28,379 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-11-06 23:05:28,379 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-11-06 23:05:28,379 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-11-06 23:05:28,379 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-11-06 23:05:28,380 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-06 23:05:28,380 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-11-06 23:05:28,380 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-11-06 23:05:28,380 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-11-06 23:05:28,380 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-11-06 23:05:28,381 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-11-06 23:05:28,381 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-11-06 23:05:28,381 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-11-06 23:05:28,381 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-11-06 23:05:28,381 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-11-06 23:05:28,381 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 23:05:28,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 23:05:28,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 23:05:28,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 23:05:28,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 23:05:28,382 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 23:05:28,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 23:05:33,171 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 23:05:33,172 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-06 23:05:33,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:05:33 BoogieIcfgContainer [2020-11-06 23:05:33,179 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 23:05:33,181 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 23:05:33,181 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 23:05:33,185 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 23:05:33,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:05:25" (1/3) ... [2020-11-06 23:05:33,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24f61735 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:05:33, skipping insertion in model container [2020-11-06 23:05:33,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:28" (2/3) ... [2020-11-06 23:05:33,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24f61735 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:05:33, skipping insertion in model container [2020-11-06 23:05:33,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:05:33" (3/3) ... [2020-11-06 23:05:33,189 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-11-06 23:05:33,209 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 23:05:33,214 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 23:05:33,229 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 23:05:33,331 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 23:05:33,332 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 23:05:33,332 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 23:05:33,332 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 23:05:33,332 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 23:05:33,332 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 23:05:33,333 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 23:05:33,333 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 23:05:33,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states. [2020-11-06 23:05:33,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2020-11-06 23:05:33,484 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:05:33,486 INFO L422 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:05:33,486 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:05:33,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:05:33,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1245767728, now seen corresponding path program 1 times [2020-11-06 23:05:33,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:05:33,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569168122] [2020-11-06 23:05:33,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:05:34,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:05:36,948 WARN L194 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 430 [2020-11-06 23:05:36,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:05:36,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:05:37,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:05:37,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569168122] [2020-11-06 23:05:37,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:05:37,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:05:37,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531024924] [2020-11-06 23:05:37,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:05:37,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:05:37,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:05:37,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:05:37,463 INFO L87 Difference]: Start difference. First operand 1510 states. Second operand 5 states. [2020-11-06 23:05:53,935 WARN L194 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 436 [2020-11-06 23:05:57,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:05:57,466 INFO L93 Difference]: Finished difference Result 4464 states and 8062 transitions. [2020-11-06 23:05:57,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-06 23:05:57,474 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 494 [2020-11-06 23:05:57,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:05:57,538 INFO L225 Difference]: With dead ends: 4464 [2020-11-06 23:05:57,538 INFO L226 Difference]: Without dead ends: 2963 [2020-11-06 23:05:57,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:05:57,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2963 states. [2020-11-06 23:05:57,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2963 to 2906. [2020-11-06 23:05:57,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2906 states. [2020-11-06 23:05:57,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2906 states to 2906 states and 4773 transitions. [2020-11-06 23:05:57,818 INFO L78 Accepts]: Start accepts. Automaton has 2906 states and 4773 transitions. Word has length 494 [2020-11-06 23:05:57,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:05:57,820 INFO L481 AbstractCegarLoop]: Abstraction has 2906 states and 4773 transitions. [2020-11-06 23:05:57,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:05:57,821 INFO L276 IsEmpty]: Start isEmpty. Operand 2906 states and 4773 transitions. [2020-11-06 23:05:57,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-11-06 23:05:57,840 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:05:57,841 INFO L422 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:05:57,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 23:05:57,842 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:05:57,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:05:57,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1929034647, now seen corresponding path program 1 times [2020-11-06 23:05:57,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:05:57,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655946288] [2020-11-06 23:05:57,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:05:57,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:05:59,707 WARN L194 SmtUtils]: Spent 1.37 s on a formula simplification that was a NOOP. DAG size: 430 [2020-11-06 23:05:59,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:05:59,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:06:00,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:06:00,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655946288] [2020-11-06 23:06:00,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:06:00,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:06:00,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50348159] [2020-11-06 23:06:00,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:06:00,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:06:00,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:06:00,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:06:00,059 INFO L87 Difference]: Start difference. First operand 2906 states and 4773 transitions. Second operand 4 states. [2020-11-06 23:06:20,146 WARN L194 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 435 [2020-11-06 23:06:23,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:06:23,495 INFO L93 Difference]: Finished difference Result 8439 states and 13822 transitions. [2020-11-06 23:06:23,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:06:23,497 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 496 [2020-11-06 23:06:23,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:06:23,535 INFO L225 Difference]: With dead ends: 8439 [2020-11-06 23:06:23,536 INFO L226 Difference]: Without dead ends: 5747 [2020-11-06 23:06:23,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:06:23,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5747 states. [2020-11-06 23:06:23,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5747 to 5692. [2020-11-06 23:06:23,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5692 states. [2020-11-06 23:06:23,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5692 states to 5692 states and 9325 transitions. [2020-11-06 23:06:23,831 INFO L78 Accepts]: Start accepts. Automaton has 5692 states and 9325 transitions. Word has length 496 [2020-11-06 23:06:23,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:06:23,833 INFO L481 AbstractCegarLoop]: Abstraction has 5692 states and 9325 transitions. [2020-11-06 23:06:23,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:06:23,834 INFO L276 IsEmpty]: Start isEmpty. Operand 5692 states and 9325 transitions. [2020-11-06 23:06:23,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-11-06 23:06:23,851 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:06:23,852 INFO L422 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:06:23,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 23:06:23,853 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:06:23,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:06:23,860 INFO L82 PathProgramCache]: Analyzing trace with hash -207510164, now seen corresponding path program 1 times [2020-11-06 23:06:23,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:06:23,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713614802] [2020-11-06 23:06:23,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:06:23,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:06:25,285 WARN L194 SmtUtils]: Spent 1.20 s on a formula simplification that was a NOOP. DAG size: 430 [2020-11-06 23:06:25,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:06:25,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:06:25,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:06:25,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713614802] [2020-11-06 23:06:25,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:06:25,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:06:25,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177549990] [2020-11-06 23:06:25,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:06:25,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:06:25,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:06:25,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:06:25,536 INFO L87 Difference]: Start difference. First operand 5692 states and 9325 transitions. Second operand 4 states. [2020-11-06 23:06:47,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:06:47,071 INFO L93 Difference]: Finished difference Result 16977 states and 27806 transitions. [2020-11-06 23:06:47,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 23:06:47,072 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 497 [2020-11-06 23:06:47,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:06:47,123 INFO L225 Difference]: With dead ends: 16977 [2020-11-06 23:06:47,123 INFO L226 Difference]: Without dead ends: 11337 [2020-11-06 23:06:47,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:06:47,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11337 states. [2020-11-06 23:06:47,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11337 to 5739. [2020-11-06 23:06:47,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5739 states. [2020-11-06 23:06:47,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5739 states to 5739 states and 9399 transitions. [2020-11-06 23:06:47,479 INFO L78 Accepts]: Start accepts. Automaton has 5739 states and 9399 transitions. Word has length 497 [2020-11-06 23:06:47,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:06:47,479 INFO L481 AbstractCegarLoop]: Abstraction has 5739 states and 9399 transitions. [2020-11-06 23:06:47,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:06:47,480 INFO L276 IsEmpty]: Start isEmpty. Operand 5739 states and 9399 transitions. [2020-11-06 23:06:47,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-11-06 23:06:47,499 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:06:47,500 INFO L422 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:06:47,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-06 23:06:47,500 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:06:47,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:06:47,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1843891964, now seen corresponding path program 1 times [2020-11-06 23:06:47,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:06:47,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291349110] [2020-11-06 23:06:47,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:06:47,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:06:49,152 WARN L194 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 430 [2020-11-06 23:06:49,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:06:49,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:06:49,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:06:49,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291349110] [2020-11-06 23:06:49,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:06:49,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:06:49,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446309208] [2020-11-06 23:06:49,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:06:49,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:06:49,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:06:49,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:06:49,506 INFO L87 Difference]: Start difference. First operand 5739 states and 9399 transitions. Second operand 4 states. [2020-11-06 23:07:10,438 WARN L194 SmtUtils]: Spent 1.32 s on a formula simplification that was a NOOP. DAG size: 435 [2020-11-06 23:07:14,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:07:14,096 INFO L93 Difference]: Finished difference Result 16541 states and 26994 transitions. [2020-11-06 23:07:14,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:07:14,096 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 498 [2020-11-06 23:07:14,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:07:14,143 INFO L225 Difference]: With dead ends: 16541 [2020-11-06 23:07:14,143 INFO L226 Difference]: Without dead ends: 11201 [2020-11-06 23:07:14,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:07:14,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11201 states. [2020-11-06 23:07:14,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11201 to 11148. [2020-11-06 23:07:14,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11148 states. [2020-11-06 23:07:14,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11148 states to 11148 states and 18173 transitions. [2020-11-06 23:07:14,644 INFO L78 Accepts]: Start accepts. Automaton has 11148 states and 18173 transitions. Word has length 498 [2020-11-06 23:07:14,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:07:14,645 INFO L481 AbstractCegarLoop]: Abstraction has 11148 states and 18173 transitions. [2020-11-06 23:07:14,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:07:14,645 INFO L276 IsEmpty]: Start isEmpty. Operand 11148 states and 18173 transitions. [2020-11-06 23:07:14,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-11-06 23:07:14,672 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:07:14,673 INFO L422 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:07:14,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-06 23:07:14,673 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:07:14,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:07:14,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1044788809, now seen corresponding path program 1 times [2020-11-06 23:07:14,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:07:14,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829156415] [2020-11-06 23:07:14,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:07:14,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:07:16,219 WARN L194 SmtUtils]: Spent 1.31 s on a formula simplification that was a NOOP. DAG size: 430 [2020-11-06 23:07:16,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:07:16,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:07:16,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:07:16,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829156415] [2020-11-06 23:07:16,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:07:16,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:07:16,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465920725] [2020-11-06 23:07:16,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:07:16,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:07:16,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:07:16,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:07:16,435 INFO L87 Difference]: Start difference. First operand 11148 states and 18173 transitions. Second operand 4 states. [2020-11-06 23:07:40,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:07:40,474 INFO L93 Difference]: Finished difference Result 33186 states and 54073 transitions. [2020-11-06 23:07:40,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 23:07:40,476 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 498 [2020-11-06 23:07:40,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:07:40,524 INFO L225 Difference]: With dead ends: 33186 [2020-11-06 23:07:40,524 INFO L226 Difference]: Without dead ends: 22182 [2020-11-06 23:07:40,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:07:40,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22182 states. [2020-11-06 23:07:41,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22182 to 11246. [2020-11-06 23:07:41,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11246 states. [2020-11-06 23:07:41,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11246 states to 11246 states and 18324 transitions. [2020-11-06 23:07:41,206 INFO L78 Accepts]: Start accepts. Automaton has 11246 states and 18324 transitions. Word has length 498 [2020-11-06 23:07:41,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:07:41,207 INFO L481 AbstractCegarLoop]: Abstraction has 11246 states and 18324 transitions. [2020-11-06 23:07:41,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:07:41,207 INFO L276 IsEmpty]: Start isEmpty. Operand 11246 states and 18324 transitions. [2020-11-06 23:07:41,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-11-06 23:07:41,233 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:07:41,233 INFO L422 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:07:41,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-06 23:07:41,239 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:07:41,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:07:41,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1340191421, now seen corresponding path program 1 times [2020-11-06 23:07:41,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:07:41,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747017488] [2020-11-06 23:07:41,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:07:41,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:07:42,683 WARN L194 SmtUtils]: Spent 1.22 s on a formula simplification that was a NOOP. DAG size: 430 [2020-11-06 23:07:42,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:07:42,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:07:42,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:07:42,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747017488] [2020-11-06 23:07:42,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:07:42,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:07:43,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926595493] [2020-11-06 23:07:43,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:07:43,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:07:43,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:07:43,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:07:43,002 INFO L87 Difference]: Start difference. First operand 11246 states and 18324 transitions. Second operand 4 states. [2020-11-06 23:08:07,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:08:07,659 INFO L93 Difference]: Finished difference Result 33321 states and 54254 transitions. [2020-11-06 23:08:07,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 23:08:07,660 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 499 [2020-11-06 23:08:07,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:08:07,712 INFO L225 Difference]: With dead ends: 33321 [2020-11-06 23:08:07,712 INFO L226 Difference]: Without dead ends: 22299 [2020-11-06 23:08:07,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:08:07,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22299 states. [2020-11-06 23:08:08,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22299 to 11363. [2020-11-06 23:08:08,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11363 states. [2020-11-06 23:08:08,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11363 states to 11363 states and 18470 transitions. [2020-11-06 23:08:08,377 INFO L78 Accepts]: Start accepts. Automaton has 11363 states and 18470 transitions. Word has length 499 [2020-11-06 23:08:08,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:08:08,378 INFO L481 AbstractCegarLoop]: Abstraction has 11363 states and 18470 transitions. [2020-11-06 23:08:08,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:08:08,378 INFO L276 IsEmpty]: Start isEmpty. Operand 11363 states and 18470 transitions. [2020-11-06 23:08:08,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-11-06 23:08:08,400 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:08:08,401 INFO L422 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:08:08,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-06 23:08:08,401 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:08:08,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:08:08,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1929980682, now seen corresponding path program 1 times [2020-11-06 23:08:08,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:08:08,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112603155] [2020-11-06 23:08:08,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:08:08,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:08:09,940 WARN L194 SmtUtils]: Spent 1.29 s on a formula simplification that was a NOOP. DAG size: 430 [2020-11-06 23:08:09,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:08:09,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:08:10,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:08:10,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112603155] [2020-11-06 23:08:10,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:08:10,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:08:10,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015878112] [2020-11-06 23:08:10,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:08:10,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:08:10,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:08:10,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:08:10,201 INFO L87 Difference]: Start difference. First operand 11363 states and 18470 transitions. Second operand 4 states. [2020-11-06 23:08:27,848 WARN L194 SmtUtils]: Spent 1.40 s on a formula simplification that was a NOOP. DAG size: 435 [2020-11-06 23:08:28,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:08:28,123 INFO L93 Difference]: Finished difference Result 21948 states and 35245 transitions. [2020-11-06 23:08:28,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:08:28,126 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 500 [2020-11-06 23:08:28,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:08:28,151 INFO L225 Difference]: With dead ends: 21948 [2020-11-06 23:08:28,151 INFO L226 Difference]: Without dead ends: 15102 [2020-11-06 23:08:28,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:08:28,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15102 states. [2020-11-06 23:08:28,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15102 to 12963. [2020-11-06 23:08:28,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12963 states. [2020-11-06 23:08:28,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12963 states to 12963 states and 21118 transitions. [2020-11-06 23:08:28,798 INFO L78 Accepts]: Start accepts. Automaton has 12963 states and 21118 transitions. Word has length 500 [2020-11-06 23:08:28,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:08:28,798 INFO L481 AbstractCegarLoop]: Abstraction has 12963 states and 21118 transitions. [2020-11-06 23:08:28,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:08:28,798 INFO L276 IsEmpty]: Start isEmpty. Operand 12963 states and 21118 transitions. [2020-11-06 23:08:28,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-11-06 23:08:28,820 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:08:28,821 INFO L422 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:08:28,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-06 23:08:28,821 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:08:28,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:08:28,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1143939649, now seen corresponding path program 1 times [2020-11-06 23:08:28,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:08:28,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133250232] [2020-11-06 23:08:28,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:08:28,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:08:30,503 WARN L194 SmtUtils]: Spent 1.27 s on a formula simplification that was a NOOP. DAG size: 430 [2020-11-06 23:08:30,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:08:30,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:08:30,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:08:30,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133250232] [2020-11-06 23:08:30,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:08:30,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:08:30,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552226502] [2020-11-06 23:08:30,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:08:30,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:08:30,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:08:30,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:08:30,878 INFO L87 Difference]: Start difference. First operand 12963 states and 21118 transitions. Second operand 4 states. [2020-11-06 23:08:53,669 WARN L194 SmtUtils]: Spent 1.34 s on a formula simplification that was a NOOP. DAG size: 435 [2020-11-06 23:08:57,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:08:57,828 INFO L93 Difference]: Finished difference Result 37125 states and 60355 transitions. [2020-11-06 23:08:57,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:08:57,830 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 500 [2020-11-06 23:08:57,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:08:57,865 INFO L225 Difference]: With dead ends: 37125 [2020-11-06 23:08:57,865 INFO L226 Difference]: Without dead ends: 25131 [2020-11-06 23:08:57,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:08:57,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25131 states. [2020-11-06 23:08:58,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25131 to 25080. [2020-11-06 23:08:58,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25080 states. [2020-11-06 23:08:58,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25080 states to 25080 states and 40687 transitions. [2020-11-06 23:08:58,956 INFO L78 Accepts]: Start accepts. Automaton has 25080 states and 40687 transitions. Word has length 500 [2020-11-06 23:08:58,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:08:58,956 INFO L481 AbstractCegarLoop]: Abstraction has 25080 states and 40687 transitions. [2020-11-06 23:08:58,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:08:58,957 INFO L276 IsEmpty]: Start isEmpty. Operand 25080 states and 40687 transitions. [2020-11-06 23:08:58,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-11-06 23:08:58,984 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:08:58,985 INFO L422 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:08:58,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-06 23:08:58,985 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:08:58,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:08:58,986 INFO L82 PathProgramCache]: Analyzing trace with hash 24303708, now seen corresponding path program 1 times [2020-11-06 23:08:58,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:08:58,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738585133] [2020-11-06 23:08:58,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:08:59,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:09:01,384 WARN L194 SmtUtils]: Spent 1.27 s on a formula simplification that was a NOOP. DAG size: 430 [2020-11-06 23:09:01,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:09:01,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:09:01,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:09:01,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738585133] [2020-11-06 23:09:01,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:09:01,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:09:01,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025653459] [2020-11-06 23:09:01,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:09:01,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:09:01,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:09:01,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:09:01,807 INFO L87 Difference]: Start difference. First operand 25080 states and 40687 transitions. Second operand 5 states. [2020-11-06 23:09:21,421 WARN L194 SmtUtils]: Spent 1.37 s on a formula simplification that was a NOOP. DAG size: 436 [2020-11-06 23:09:26,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:09:26,043 INFO L93 Difference]: Finished difference Result 73663 states and 119511 transitions. [2020-11-06 23:09:26,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:09:26,044 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 500 [2020-11-06 23:09:26,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:09:26,099 INFO L225 Difference]: With dead ends: 73663 [2020-11-06 23:09:26,099 INFO L226 Difference]: Without dead ends: 48801 [2020-11-06 23:09:26,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:09:26,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48801 states. [2020-11-06 23:09:28,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48801 to 48756. [2020-11-06 23:09:28,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48756 states. [2020-11-06 23:09:28,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48756 states to 48756 states and 78766 transitions. [2020-11-06 23:09:28,562 INFO L78 Accepts]: Start accepts. Automaton has 48756 states and 78766 transitions. Word has length 500 [2020-11-06 23:09:28,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:09:28,563 INFO L481 AbstractCegarLoop]: Abstraction has 48756 states and 78766 transitions. [2020-11-06 23:09:28,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:09:28,563 INFO L276 IsEmpty]: Start isEmpty. Operand 48756 states and 78766 transitions. [2020-11-06 23:09:28,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-11-06 23:09:28,615 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:09:28,616 INFO L422 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:09:28,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-06 23:09:28,616 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:09:28,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:09:28,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1506297529, now seen corresponding path program 1 times [2020-11-06 23:09:28,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:09:28,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763299915] [2020-11-06 23:09:28,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:09:28,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:09:30,371 WARN L194 SmtUtils]: Spent 1.45 s on a formula simplification that was a NOOP. DAG size: 430 [2020-11-06 23:09:30,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:09:30,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:09:30,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:09:30,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763299915] [2020-11-06 23:09:30,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:09:30,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:09:30,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044994079] [2020-11-06 23:09:30,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:09:30,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:09:30,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:09:30,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:09:30,872 INFO L87 Difference]: Start difference. First operand 48756 states and 78766 transitions. Second operand 4 states. [2020-11-06 23:09:56,772 WARN L194 SmtUtils]: Spent 1.37 s on a formula simplification that was a NOOP. DAG size: 435 [2020-11-06 23:10:01,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:10:01,923 INFO L93 Difference]: Finished difference Result 143277 states and 231275 transitions. [2020-11-06 23:10:01,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:10:01,924 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 502 [2020-11-06 23:10:01,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:10:02,039 INFO L225 Difference]: With dead ends: 143277 [2020-11-06 23:10:02,040 INFO L226 Difference]: Without dead ends: 96063 [2020-11-06 23:10:02,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:10:02,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96063 states. [2020-11-06 23:10:06,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96063 to 96022. [2020-11-06 23:10:06,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96022 states. [2020-11-06 23:10:07,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96022 states to 96022 states and 154548 transitions. [2020-11-06 23:10:07,339 INFO L78 Accepts]: Start accepts. Automaton has 96022 states and 154548 transitions. Word has length 502 [2020-11-06 23:10:07,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:10:07,339 INFO L481 AbstractCegarLoop]: Abstraction has 96022 states and 154548 transitions. [2020-11-06 23:10:07,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:10:07,339 INFO L276 IsEmpty]: Start isEmpty. Operand 96022 states and 154548 transitions. [2020-11-06 23:10:07,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-11-06 23:10:07,579 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:10:07,579 INFO L422 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:10:07,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-06 23:10:07,579 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:10:07,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:10:07,582 INFO L82 PathProgramCache]: Analyzing trace with hash 493166577, now seen corresponding path program 1 times [2020-11-06 23:10:07,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:10:07,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943368439] [2020-11-06 23:10:07,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:10:08,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:10:09,589 WARN L194 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 430 [2020-11-06 23:10:09,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:10:09,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:10:10,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:10:10,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943368439] [2020-11-06 23:10:10,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:10:10,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:10:10,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597803160] [2020-11-06 23:10:10,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:10:10,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:10:10,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:10:10,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:10:10,083 INFO L87 Difference]: Start difference. First operand 96022 states and 154548 transitions. Second operand 5 states. [2020-11-06 23:10:35,575 WARN L194 SmtUtils]: Spent 1.50 s on a formula simplification that was a NOOP. DAG size: 436 [2020-11-06 23:10:42,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:10:42,188 INFO L93 Difference]: Finished difference Result 284707 states and 458333 transitions. [2020-11-06 23:10:42,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:10:42,189 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 504 [2020-11-06 23:10:42,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:10:42,461 INFO L225 Difference]: With dead ends: 284707 [2020-11-06 23:10:42,462 INFO L226 Difference]: Without dead ends: 189022 [2020-11-06 23:10:42,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:10:42,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189022 states. [2020-11-06 23:10:52,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189022 to 188989. [2020-11-06 23:10:52,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188989 states. [2020-11-06 23:10:52,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188989 states to 188989 states and 302950 transitions. [2020-11-06 23:10:52,704 INFO L78 Accepts]: Start accepts. Automaton has 188989 states and 302950 transitions. Word has length 504 [2020-11-06 23:10:52,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:10:52,705 INFO L481 AbstractCegarLoop]: Abstraction has 188989 states and 302950 transitions. [2020-11-06 23:10:52,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:10:52,705 INFO L276 IsEmpty]: Start isEmpty. Operand 188989 states and 302950 transitions. [2020-11-06 23:10:53,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2020-11-06 23:10:53,100 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:10:53,101 INFO L422 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:10:53,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-06 23:10:53,101 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:10:53,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:10:53,102 INFO L82 PathProgramCache]: Analyzing trace with hash -547241806, now seen corresponding path program 1 times [2020-11-06 23:10:53,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:10:53,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728240881] [2020-11-06 23:10:53,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:10:53,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:10:55,147 WARN L194 SmtUtils]: Spent 1.34 s on a formula simplification that was a NOOP. DAG size: 430 [2020-11-06 23:10:55,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:10:55,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:10:55,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:10:55,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728240881] [2020-11-06 23:10:55,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:10:55,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:10:55,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102959512] [2020-11-06 23:10:55,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:10:55,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:10:55,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:10:55,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:10:55,514 INFO L87 Difference]: Start difference. First operand 188989 states and 302950 transitions. Second operand 5 states. [2020-11-06 23:11:26,316 WARN L194 SmtUtils]: Spent 1.34 s on a formula simplification that was a NOOP. DAG size: 436 [2020-11-06 23:11:36,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:11:36,046 INFO L93 Difference]: Finished difference Result 561355 states and 899646 transitions. [2020-11-06 23:11:36,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:11:36,047 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 506 [2020-11-06 23:11:36,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:11:36,660 INFO L225 Difference]: With dead ends: 561355 [2020-11-06 23:11:36,660 INFO L226 Difference]: Without dead ends: 373217 [2020-11-06 23:11:37,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:11:37,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373217 states. [2020-11-06 23:11:57,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373217 to 372495. [2020-11-06 23:11:57,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372495 states. [2020-11-06 23:11:58,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372495 states to 372495 states and 594728 transitions. [2020-11-06 23:11:58,856 INFO L78 Accepts]: Start accepts. Automaton has 372495 states and 594728 transitions. Word has length 506 [2020-11-06 23:11:58,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:11:58,856 INFO L481 AbstractCegarLoop]: Abstraction has 372495 states and 594728 transitions. [2020-11-06 23:11:58,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:11:58,857 INFO L276 IsEmpty]: Start isEmpty. Operand 372495 states and 594728 transitions. [2020-11-06 23:11:59,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2020-11-06 23:11:59,695 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:11:59,696 INFO L422 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 23:11:59,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-06 23:11:59,696 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:11:59,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:11:59,697 INFO L82 PathProgramCache]: Analyzing trace with hash -954450293, now seen corresponding path program 1 times [2020-11-06 23:11:59,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:11:59,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703318731] [2020-11-06 23:11:59,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:11:59,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:12:01,619 WARN L194 SmtUtils]: Spent 1.65 s on a formula simplification that was a NOOP. DAG size: 430 [2020-11-06 23:12:01,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:12:01,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:12:02,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:12:02,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703318731] [2020-11-06 23:12:02,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:12:02,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:12:02,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031388405] [2020-11-06 23:12:02,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:12:02,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:12:02,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:12:02,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:12:02,029 INFO L87 Difference]: Start difference. First operand 372495 states and 594728 transitions. Second operand 4 states. [2020-11-06 23:12:52,133 WARN L194 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 435 [2020-11-06 23:13:07,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:13:07,700 INFO L93 Difference]: Finished difference Result 1101403 states and 1756742 transitions. [2020-11-06 23:13:07,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:13:07,701 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 508 [2020-11-06 23:13:07,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:13:09,165 INFO L225 Difference]: With dead ends: 1101403 [2020-11-06 23:13:09,165 INFO L226 Difference]: Without dead ends: 736745 [2020-11-06 23:13:09,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:13:10,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736745 states. [2020-11-06 23:13:49,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736745 to 736023. [2020-11-06 23:13:49,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 736023 states.