/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.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 23:02:58,676 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 23:02:58,680 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 23:02:58,735 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 23:02:58,736 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 23:02:58,741 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 23:02:58,744 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 23:02:58,752 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 23:02:58,755 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 23:02:58,762 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 23:02:58,763 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 23:02:58,765 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 23:02:58,765 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 23:02:58,768 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 23:02:58,770 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 23:02:58,772 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 23:02:58,773 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 23:02:58,776 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 23:02:58,784 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 23:02:58,789 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 23:02:58,791 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 23:02:58,792 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 23:02:58,794 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 23:02:58,794 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 23:02:58,802 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 23:02:58,813 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 23:02:58,814 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 23:02:58,815 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 23:02:58,815 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 23:02:58,871 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 23:02:58,871 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 23:02:58,875 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 23:02:58,875 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 23:02:58,875 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 23:02:58,876 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 23:02:58,876 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 23:02:58,876 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 23:02:58,876 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 23:02:58,877 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 23:02:58,878 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 23:02:58,878 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 23:02:58,878 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 23:02:58,878 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 23:02:58,879 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 23:02:58,879 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 23:02:58,879 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 23:02:58,879 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 23:02:58,879 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 23:02:58,880 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 23:02:58,880 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 23:02:58,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 23:02:58,880 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 23:02:58,881 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 23:02:58,881 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 23:02:58,881 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 23:02:58,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 23:02:58,881 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 23:02:58,882 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 23:02:58,882 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 23:02:59,231 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 23:02:59,279 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 23:02:59,283 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 23:02:59,284 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 23:02:59,285 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 23:02:59,285 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-11-06 23:02:59,352 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0143bbd96/7df7fb4fe183476299ce565ac532ef09/FLAG7c48c2ae8 [2020-11-06 23:03:00,235 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 23:03:00,238 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-11-06 23:03:00,260 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0143bbd96/7df7fb4fe183476299ce565ac532ef09/FLAG7c48c2ae8 [2020-11-06 23:03:00,343 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0143bbd96/7df7fb4fe183476299ce565ac532ef09 [2020-11-06 23:03:00,350 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 23:03:00,358 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 23:03:00,362 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 23:03:00,362 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 23:03:00,366 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 23:03:00,367 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:03:00" (1/1) ... [2020-11-06 23:03:00,372 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21359f73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:00, skipping insertion in model container [2020-11-06 23:03:00,372 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:03:00" (1/1) ... [2020-11-06 23:03:00,381 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 23:03:00,547 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 23:03:02,023 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 23:03:02,040 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 23:03:02,887 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 23:03:02,915 INFO L208 MainTranslator]: Completed translation [2020-11-06 23:03:02,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:02 WrapperNode [2020-11-06 23:03:02,916 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 23:03:02,917 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 23:03:02,918 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 23:03:02,918 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 23:03:02,932 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:02" (1/1) ... [2020-11-06 23:03:02,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:02" (1/1) ... [2020-11-06 23:03:02,985 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:02" (1/1) ... [2020-11-06 23:03:02,986 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:02" (1/1) ... [2020-11-06 23:03:03,061 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:02" (1/1) ... [2020-11-06 23:03:03,109 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:02" (1/1) ... [2020-11-06 23:03:03,133 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:02" (1/1) ... [2020-11-06 23:03:03,157 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 23:03:03,160 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 23:03:03,160 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 23:03:03,160 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 23:03:03,161 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:02" (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 23:03:03,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 23:03:03,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 23:03:03,244 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 23:03:03,244 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-06 23:03:03,244 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 23:03:03,245 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 23:03:03,245 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 23:03:03,245 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 23:03:03,245 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 23:03:03,246 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-11-06 23:03:03,246 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-11-06 23:03:03,246 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-11-06 23:03:03,247 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-11-06 23:03:03,247 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-06 23:03:03,248 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-11-06 23:03:03,249 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-11-06 23:03:03,249 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-11-06 23:03:03,249 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-11-06 23:03:03,249 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-11-06 23:03:03,249 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-11-06 23:03:03,249 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-11-06 23:03:03,249 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-11-06 23:03:03,250 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 23:03:03,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 23:03:03,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 23:03:03,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 23:03:03,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 23:03:03,250 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 23:03:03,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 23:03:07,528 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 23:03:07,529 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-06 23:03:07,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:03:07 BoogieIcfgContainer [2020-11-06 23:03:07,533 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 23:03:07,535 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 23:03:07,536 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 23:03:07,540 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 23:03:07,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:03:00" (1/3) ... [2020-11-06 23:03:07,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f1e5a74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:03:07, skipping insertion in model container [2020-11-06 23:03:07,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:02" (2/3) ... [2020-11-06 23:03:07,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f1e5a74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:03:07, skipping insertion in model container [2020-11-06 23:03:07,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:03:07" (3/3) ... [2020-11-06 23:03:07,544 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-11-06 23:03:07,561 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 23:03:07,566 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 23:03:07,580 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 23:03:07,618 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 23:03:07,618 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 23:03:07,618 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 23:03:07,619 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 23:03:07,619 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 23:03:07,619 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 23:03:07,619 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 23:03:07,619 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 23:03:07,660 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states. [2020-11-06 23:03:07,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-11-06 23:03:07,695 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:03:07,697 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] [2020-11-06 23:03:07,697 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:03:07,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:03:07,704 INFO L82 PathProgramCache]: Analyzing trace with hash -248347841, now seen corresponding path program 1 times [2020-11-06 23:03:07,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:03:07,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659829826] [2020-11-06 23:03:07,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:03:08,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:09,961 WARN L194 SmtUtils]: Spent 1.29 s on a formula simplification that was a NOOP. DAG size: 352 [2020-11-06 23:03:09,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:03:10,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:10,322 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 23:03:10,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659829826] [2020-11-06 23:03:10,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:03:10,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:03:10,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18260556] [2020-11-06 23:03:10,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:03:10,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:03:10,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:03:10,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:03:10,374 INFO L87 Difference]: Start difference. First operand 1031 states. Second operand 4 states. [2020-11-06 23:03:11,594 WARN L194 SmtUtils]: Spent 1.05 s on a formula simplification that was a NOOP. DAG size: 353 [2020-11-06 23:03:21,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:03:21,209 INFO L93 Difference]: Finished difference Result 1809 states and 3227 transitions. [2020-11-06 23:03:21,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:03:21,212 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-11-06 23:03:21,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:03:21,261 INFO L225 Difference]: With dead ends: 1809 [2020-11-06 23:03:21,262 INFO L226 Difference]: Without dead ends: 1520 [2020-11-06 23:03:21,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:03:21,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2020-11-06 23:03:21,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 1517. [2020-11-06 23:03:21,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1517 states. [2020-11-06 23:03:21,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1517 states to 1517 states and 2337 transitions. [2020-11-06 23:03:21,455 INFO L78 Accepts]: Start accepts. Automaton has 1517 states and 2337 transitions. Word has length 328 [2020-11-06 23:03:21,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:03:21,462 INFO L481 AbstractCegarLoop]: Abstraction has 1517 states and 2337 transitions. [2020-11-06 23:03:21,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:03:21,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1517 states and 2337 transitions. [2020-11-06 23:03:21,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-11-06 23:03:21,477 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:03:21,478 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] [2020-11-06 23:03:21,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 23:03:21,480 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:03:21,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:03:21,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1869741437, now seen corresponding path program 1 times [2020-11-06 23:03:21,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:03:21,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364995749] [2020-11-06 23:03:21,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:03:21,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:22,843 WARN L194 SmtUtils]: Spent 851.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-11-06 23:03:22,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:03:22,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:23,101 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 23:03:23,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364995749] [2020-11-06 23:03:23,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:03:23,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:03:23,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142005058] [2020-11-06 23:03:23,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:03:23,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:03:23,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:03:23,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:03:23,121 INFO L87 Difference]: Start difference. First operand 1517 states and 2337 transitions. Second operand 4 states. [2020-11-06 23:03:24,059 WARN L194 SmtUtils]: Spent 879.00 ms on a formula simplification that was a NOOP. DAG size: 353 [2020-11-06 23:03:31,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:03:31,817 INFO L93 Difference]: Finished difference Result 2970 states and 4624 transitions. [2020-11-06 23:03:31,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:03:31,818 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-11-06 23:03:31,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:03:31,834 INFO L225 Difference]: With dead ends: 2970 [2020-11-06 23:03:31,834 INFO L226 Difference]: Without dead ends: 2602 [2020-11-06 23:03:31,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:03:31,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2602 states. [2020-11-06 23:03:31,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2602 to 2599. [2020-11-06 23:03:31,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2599 states. [2020-11-06 23:03:31,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2599 states to 2599 states and 4020 transitions. [2020-11-06 23:03:31,966 INFO L78 Accepts]: Start accepts. Automaton has 2599 states and 4020 transitions. Word has length 328 [2020-11-06 23:03:31,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:03:31,967 INFO L481 AbstractCegarLoop]: Abstraction has 2599 states and 4020 transitions. [2020-11-06 23:03:31,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:03:31,967 INFO L276 IsEmpty]: Start isEmpty. Operand 2599 states and 4020 transitions. [2020-11-06 23:03:31,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-11-06 23:03:31,977 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:03:31,981 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] [2020-11-06 23:03:31,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 23:03:31,983 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:03:31,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:03:31,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1880238502, now seen corresponding path program 1 times [2020-11-06 23:03:31,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:03:31,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605659242] [2020-11-06 23:03:31,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:03:32,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:33,545 WARN L194 SmtUtils]: Spent 835.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-11-06 23:03:33,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:03:33,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:33,803 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 23:03:33,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605659242] [2020-11-06 23:03:33,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:03:33,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:03:33,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856833970] [2020-11-06 23:03:33,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:03:33,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:03:33,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:03:33,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:03:33,808 INFO L87 Difference]: Start difference. First operand 2599 states and 4020 transitions. Second operand 5 states. [2020-11-06 23:03:43,071 WARN L194 SmtUtils]: Spent 932.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-11-06 23:03:45,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:03:45,884 INFO L93 Difference]: Finished difference Result 7687 states and 11879 transitions. [2020-11-06 23:03:45,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:03:45,885 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 328 [2020-11-06 23:03:45,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:03:45,911 INFO L225 Difference]: With dead ends: 7687 [2020-11-06 23:03:45,911 INFO L226 Difference]: Without dead ends: 5103 [2020-11-06 23:03:45,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:03:45,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5103 states. [2020-11-06 23:03:46,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5103 to 4906. [2020-11-06 23:03:46,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4906 states. [2020-11-06 23:03:46,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4906 states to 4906 states and 7572 transitions. [2020-11-06 23:03:46,127 INFO L78 Accepts]: Start accepts. Automaton has 4906 states and 7572 transitions. Word has length 328 [2020-11-06 23:03:46,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:03:46,128 INFO L481 AbstractCegarLoop]: Abstraction has 4906 states and 7572 transitions. [2020-11-06 23:03:46,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:03:46,128 INFO L276 IsEmpty]: Start isEmpty. Operand 4906 states and 7572 transitions. [2020-11-06 23:03:46,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-11-06 23:03:46,141 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:03:46,142 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] [2020-11-06 23:03:46,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-06 23:03:46,142 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:03:46,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:03:46,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1042744992, now seen corresponding path program 1 times [2020-11-06 23:03:46,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:03:46,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089661838] [2020-11-06 23:03:46,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:03:46,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:47,299 WARN L194 SmtUtils]: Spent 925.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-11-06 23:03:47,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:03:47,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:47,466 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 23:03:47,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089661838] [2020-11-06 23:03:47,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:03:47,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:03:47,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924794593] [2020-11-06 23:03:47,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:03:47,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:03:47,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:03:47,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:03:47,469 INFO L87 Difference]: Start difference. First operand 4906 states and 7572 transitions. Second operand 4 states. [2020-11-06 23:03:57,795 WARN L194 SmtUtils]: Spent 884.00 ms on a formula simplification that was a NOOP. DAG size: 357 [2020-11-06 23:04:00,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:04:00,263 INFO L93 Difference]: Finished difference Result 14411 states and 22192 transitions. [2020-11-06 23:04:00,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:04:00,269 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-11-06 23:04:00,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:04:00,316 INFO L225 Difference]: With dead ends: 14411 [2020-11-06 23:04:00,316 INFO L226 Difference]: Without dead ends: 9634 [2020-11-06 23:04:00,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:04:00,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9634 states. [2020-11-06 23:04:00,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9634 to 9437. [2020-11-06 23:04:00,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9437 states. [2020-11-06 23:04:00,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9437 states to 9437 states and 14508 transitions. [2020-11-06 23:04:00,816 INFO L78 Accepts]: Start accepts. Automaton has 9437 states and 14508 transitions. Word has length 330 [2020-11-06 23:04:00,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:04:00,816 INFO L481 AbstractCegarLoop]: Abstraction has 9437 states and 14508 transitions. [2020-11-06 23:04:00,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:04:00,817 INFO L276 IsEmpty]: Start isEmpty. Operand 9437 states and 14508 transitions. [2020-11-06 23:04:00,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-11-06 23:04:00,840 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:04:00,841 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] [2020-11-06 23:04:00,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-06 23:04:00,841 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:04:00,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:04:00,842 INFO L82 PathProgramCache]: Analyzing trace with hash -198968731, now seen corresponding path program 1 times [2020-11-06 23:04:00,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:04:00,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540572864] [2020-11-06 23:04:00,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:04:00,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:01,823 WARN L194 SmtUtils]: Spent 840.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-11-06 23:04:01,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:04:01,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:01,998 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 23:04:01,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540572864] [2020-11-06 23:04:01,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:04:01,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:04:01,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513280342] [2020-11-06 23:04:02,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:04:02,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:04:02,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:04:02,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:04:02,001 INFO L87 Difference]: Start difference. First operand 9437 states and 14508 transitions. Second operand 4 states. [2020-11-06 23:04:14,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:04:14,640 INFO L93 Difference]: Finished difference Result 28234 states and 43399 transitions. [2020-11-06 23:04:14,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 23:04:14,641 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-11-06 23:04:14,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:04:14,720 INFO L225 Difference]: With dead ends: 28234 [2020-11-06 23:04:14,721 INFO L226 Difference]: Without dead ends: 18839 [2020-11-06 23:04:14,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:04:14,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18839 states. [2020-11-06 23:04:15,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18839 to 9456. [2020-11-06 23:04:15,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9456 states. [2020-11-06 23:04:15,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9456 states to 9456 states and 14536 transitions. [2020-11-06 23:04:15,219 INFO L78 Accepts]: Start accepts. Automaton has 9456 states and 14536 transitions. Word has length 330 [2020-11-06 23:04:15,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:04:15,220 INFO L481 AbstractCegarLoop]: Abstraction has 9456 states and 14536 transitions. [2020-11-06 23:04:15,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:04:15,220 INFO L276 IsEmpty]: Start isEmpty. Operand 9456 states and 14536 transitions. [2020-11-06 23:04:15,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-11-06 23:04:15,240 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:04:15,241 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] [2020-11-06 23:04:15,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-06 23:04:15,246 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:04:15,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:04:15,247 INFO L82 PathProgramCache]: Analyzing trace with hash -173910725, now seen corresponding path program 1 times [2020-11-06 23:04:15,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:04:15,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286285379] [2020-11-06 23:04:15,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:04:15,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:16,283 WARN L194 SmtUtils]: Spent 894.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-11-06 23:04:16,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:04:16,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:16,404 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 23:04:16,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286285379] [2020-11-06 23:04:16,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:04:16,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:04:16,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247516791] [2020-11-06 23:04:16,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:04:16,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:04:16,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:04:16,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:04:16,407 INFO L87 Difference]: Start difference. First operand 9456 states and 14536 transitions. Second operand 4 states. [2020-11-06 23:04:29,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:04:29,279 INFO L93 Difference]: Finished difference Result 28253 states and 43420 transitions. [2020-11-06 23:04:29,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 23:04:29,282 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 331 [2020-11-06 23:04:29,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:04:29,323 INFO L225 Difference]: With dead ends: 28253 [2020-11-06 23:04:29,324 INFO L226 Difference]: Without dead ends: 18857 [2020-11-06 23:04:29,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:04:29,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18857 states. [2020-11-06 23:04:29,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18857 to 9474. [2020-11-06 23:04:29,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9474 states. [2020-11-06 23:04:29,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9474 states to 9474 states and 14557 transitions. [2020-11-06 23:04:29,827 INFO L78 Accepts]: Start accepts. Automaton has 9474 states and 14557 transitions. Word has length 331 [2020-11-06 23:04:29,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:04:29,827 INFO L481 AbstractCegarLoop]: Abstraction has 9474 states and 14557 transitions. [2020-11-06 23:04:29,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:04:29,827 INFO L276 IsEmpty]: Start isEmpty. Operand 9474 states and 14557 transitions. [2020-11-06 23:04:29,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-11-06 23:04:29,845 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:04:29,845 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] [2020-11-06 23:04:29,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-06 23:04:29,846 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:04:29,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:04:29,846 INFO L82 PathProgramCache]: Analyzing trace with hash -2078894437, now seen corresponding path program 1 times [2020-11-06 23:04:29,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:04:29,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292867470] [2020-11-06 23:04:29,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:04:29,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:30,934 WARN L194 SmtUtils]: Spent 905.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-11-06 23:04:30,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:04:30,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:31,122 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 23:04:31,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292867470] [2020-11-06 23:04:31,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:04:31,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:04:31,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566936080] [2020-11-06 23:04:31,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:04:31,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:04:31,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:04:31,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:04:31,125 INFO L87 Difference]: Start difference. First operand 9474 states and 14557 transitions. Second operand 4 states. [2020-11-06 23:04:42,070 WARN L194 SmtUtils]: Spent 891.00 ms on a formula simplification that was a NOOP. DAG size: 357 [2020-11-06 23:04:44,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:04:44,867 INFO L93 Difference]: Finished difference Result 27731 states and 42504 transitions. [2020-11-06 23:04:44,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:04:44,868 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-11-06 23:04:44,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:04:44,906 INFO L225 Difference]: With dead ends: 27731 [2020-11-06 23:04:44,906 INFO L226 Difference]: Without dead ends: 18502 [2020-11-06 23:04:44,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:04:44,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18502 states. [2020-11-06 23:04:45,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18502 to 18305. [2020-11-06 23:04:45,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18305 states. [2020-11-06 23:04:45,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18305 states to 18305 states and 27961 transitions. [2020-11-06 23:04:45,642 INFO L78 Accepts]: Start accepts. Automaton has 18305 states and 27961 transitions. Word has length 332 [2020-11-06 23:04:45,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:04:45,642 INFO L481 AbstractCegarLoop]: Abstraction has 18305 states and 27961 transitions. [2020-11-06 23:04:45,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:04:45,643 INFO L276 IsEmpty]: Start isEmpty. Operand 18305 states and 27961 transitions. [2020-11-06 23:04:45,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-11-06 23:04:45,672 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:04:45,672 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] [2020-11-06 23:04:45,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-06 23:04:45,673 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:04:45,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:04:45,673 INFO L82 PathProgramCache]: Analyzing trace with hash 895454968, now seen corresponding path program 1 times [2020-11-06 23:04:45,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:04:45,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90613705] [2020-11-06 23:04:45,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:04:45,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:46,912 WARN L194 SmtUtils]: Spent 832.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-11-06 23:04:46,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:04:46,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:47,259 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 23:04:47,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90613705] [2020-11-06 23:04:47,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:04:47,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:04:47,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729308372] [2020-11-06 23:04:47,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:04:47,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:04:47,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:04:47,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:04:47,263 INFO L87 Difference]: Start difference. First operand 18305 states and 27961 transitions. Second operand 5 states. [2020-11-06 23:04:56,884 WARN L194 SmtUtils]: Spent 900.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-11-06 23:04:59,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:04:59,901 INFO L93 Difference]: Finished difference Result 53877 states and 82132 transitions. [2020-11-06 23:04:59,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:04:59,902 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 332 [2020-11-06 23:04:59,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:04:59,975 INFO L225 Difference]: With dead ends: 53877 [2020-11-06 23:04:59,975 INFO L226 Difference]: Without dead ends: 35631 [2020-11-06 23:05:00,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:05:00,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35631 states. [2020-11-06 23:05:01,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35631 to 35450. [2020-11-06 23:05:01,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35450 states. [2020-11-06 23:05:01,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35450 states to 35450 states and 53698 transitions. [2020-11-06 23:05:01,714 INFO L78 Accepts]: Start accepts. Automaton has 35450 states and 53698 transitions. Word has length 332 [2020-11-06 23:05:01,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:05:01,715 INFO L481 AbstractCegarLoop]: Abstraction has 35450 states and 53698 transitions. [2020-11-06 23:05:01,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:05:01,715 INFO L276 IsEmpty]: Start isEmpty. Operand 35450 states and 53698 transitions. [2020-11-06 23:05:01,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-11-06 23:05:01,771 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:05:01,772 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] [2020-11-06 23:05:01,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-06 23:05:01,772 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:05:01,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:05:01,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1044041058, now seen corresponding path program 1 times [2020-11-06 23:05:01,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:05:01,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653809266] [2020-11-06 23:05:01,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:05:01,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:05:02,867 WARN L194 SmtUtils]: Spent 890.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-11-06 23:05:02,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:05:02,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:05:03,052 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 23:05:03,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653809266] [2020-11-06 23:05:03,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:05:03,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:05:03,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027890191] [2020-11-06 23:05:03,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:05:03,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:05:03,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:05:03,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:05:03,055 INFO L87 Difference]: Start difference. First operand 35450 states and 53698 transitions. Second operand 4 states. [2020-11-06 23:05:15,597 WARN L194 SmtUtils]: Spent 935.00 ms on a formula simplification that was a NOOP. DAG size: 357 [2020-11-06 23:05:19,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:05:19,184 INFO L93 Difference]: Finished difference Result 104278 states and 157581 transitions. [2020-11-06 23:05:19,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:05:19,185 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2020-11-06 23:05:19,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:05:19,286 INFO L225 Difference]: With dead ends: 104278 [2020-11-06 23:05:19,286 INFO L226 Difference]: Without dead ends: 69349 [2020-11-06 23:05:19,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:05:19,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69349 states. [2020-11-06 23:05:22,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69349 to 69184. [2020-11-06 23:05:22,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69184 states. [2020-11-06 23:05:22,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69184 states to 69184 states and 103955 transitions. [2020-11-06 23:05:22,365 INFO L78 Accepts]: Start accepts. Automaton has 69184 states and 103955 transitions. Word has length 334 [2020-11-06 23:05:22,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:05:22,366 INFO L481 AbstractCegarLoop]: Abstraction has 69184 states and 103955 transitions. [2020-11-06 23:05:22,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:05:22,366 INFO L276 IsEmpty]: Start isEmpty. Operand 69184 states and 103955 transitions. [2020-11-06 23:05:22,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-11-06 23:05:22,430 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:05:22,431 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] [2020-11-06 23:05:22,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-06 23:05:22,431 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:05:22,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:05:22,432 INFO L82 PathProgramCache]: Analyzing trace with hash -625304005, now seen corresponding path program 1 times [2020-11-06 23:05:22,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:05:22,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297199306] [2020-11-06 23:05:22,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:05:22,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:05:23,696 WARN L194 SmtUtils]: Spent 860.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-11-06 23:05:23,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:05:23,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:05:24,054 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 23:05:24,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297199306] [2020-11-06 23:05:24,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:05:24,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:05:24,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948251135] [2020-11-06 23:05:24,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:05:24,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:05:24,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:05:24,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:05:24,057 INFO L87 Difference]: Start difference. First operand 69184 states and 103955 transitions. Second operand 5 states. [2020-11-06 23:05:37,329 WARN L194 SmtUtils]: Spent 926.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-11-06 23:05:41,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:05:41,878 INFO L93 Difference]: Finished difference Result 204189 states and 306175 transitions. [2020-11-06 23:05:41,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:05:41,879 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 334 [2020-11-06 23:05:41,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:05:42,190 INFO L225 Difference]: With dead ends: 204189 [2020-11-06 23:05:42,190 INFO L226 Difference]: Without dead ends: 135160 [2020-11-06 23:05:42,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:05:42,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135160 states. [2020-11-06 23:05:48,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135160 to 135059. [2020-11-06 23:05:48,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135059 states. [2020-11-06 23:05:48,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135059 states to 135059 states and 201215 transitions. [2020-11-06 23:05:48,530 INFO L78 Accepts]: Start accepts. Automaton has 135059 states and 201215 transitions. Word has length 334 [2020-11-06 23:05:48,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:05:48,530 INFO L481 AbstractCegarLoop]: Abstraction has 135059 states and 201215 transitions. [2020-11-06 23:05:48,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:05:48,531 INFO L276 IsEmpty]: Start isEmpty. Operand 135059 states and 201215 transitions. [2020-11-06 23:05:48,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-11-06 23:05:48,930 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:05:48,930 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] [2020-11-06 23:05:48,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-06 23:05:48,930 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:05:48,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:05:48,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1258590834, now seen corresponding path program 1 times [2020-11-06 23:05:48,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:05:48,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491096519] [2020-11-06 23:05:48,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:05:49,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:05:50,283 WARN L194 SmtUtils]: Spent 1.02 s on a formula simplification that was a NOOP. DAG size: 352 [2020-11-06 23:05:50,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:05:50,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:05:50,554 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 23:05:50,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491096519] [2020-11-06 23:05:50,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:05:50,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:05:50,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097504621] [2020-11-06 23:05:50,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:05:50,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:05:50,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:05:50,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:05:50,557 INFO L87 Difference]: Start difference. First operand 135059 states and 201215 transitions. Second operand 5 states. [2020-11-06 23:06:07,543 WARN L194 SmtUtils]: Spent 937.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-11-06 23:06:14,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:06:14,270 INFO L93 Difference]: Finished difference Result 399508 states and 594218 transitions. [2020-11-06 23:06:14,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:06:14,271 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 334 [2020-11-06 23:06:14,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:06:14,696 INFO L225 Difference]: With dead ends: 399508 [2020-11-06 23:06:14,697 INFO L226 Difference]: Without dead ends: 264735 [2020-11-06 23:06:14,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:06:15,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264735 states. [2020-11-06 23:06:27,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264735 to 264346. [2020-11-06 23:06:27,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264346 states. [2020-11-06 23:06:27,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264346 states to 264346 states and 391023 transitions. [2020-11-06 23:06:27,982 INFO L78 Accepts]: Start accepts. Automaton has 264346 states and 391023 transitions. Word has length 334 [2020-11-06 23:06:27,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:06:27,982 INFO L481 AbstractCegarLoop]: Abstraction has 264346 states and 391023 transitions. [2020-11-06 23:06:27,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:06:27,982 INFO L276 IsEmpty]: Start isEmpty. Operand 264346 states and 391023 transitions. [2020-11-06 23:06:28,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-11-06 23:06:28,650 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:06:28,651 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] [2020-11-06 23:06:28,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-06 23:06:28,651 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:06:28,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:06:28,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1660486703, now seen corresponding path program 1 times [2020-11-06 23:06:28,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:06:28,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223738999] [2020-11-06 23:06:28,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:06:28,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:06:29,741 WARN L194 SmtUtils]: Spent 893.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-11-06 23:06:29,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:06:29,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:06:30,091 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 23:06:30,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223738999] [2020-11-06 23:06:30,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:06:30,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:06:30,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826550651] [2020-11-06 23:06:30,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:06:30,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:06:30,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:06:30,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:06:30,094 INFO L87 Difference]: Start difference. First operand 264346 states and 391023 transitions. Second operand 4 states. [2020-11-06 23:06:56,399 WARN L194 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 357 [2020-11-06 23:07:06,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:07:06,752 INFO L93 Difference]: Finished difference Result 780277 states and 1151721 transitions. [2020-11-06 23:07:06,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:07:06,755 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 336 [2020-11-06 23:07:06,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:07:07,849 INFO L225 Difference]: With dead ends: 780277 [2020-11-06 23:07:07,850 INFO L226 Difference]: Without dead ends: 518448 [2020-11-06 23:07:08,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:07:08,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518448 states. [2020-11-06 23:07:32,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518448 to 518059. [2020-11-06 23:07:32,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 518059 states. [2020-11-06 23:07:36,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518059 states to 518059 states and 760801 transitions. [2020-11-06 23:07:36,159 INFO L78 Accepts]: Start accepts. Automaton has 518059 states and 760801 transitions. Word has length 336 [2020-11-06 23:07:36,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:07:36,175 INFO L481 AbstractCegarLoop]: Abstraction has 518059 states and 760801 transitions. [2020-11-06 23:07:36,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:07:36,176 INFO L276 IsEmpty]: Start isEmpty. Operand 518059 states and 760801 transitions.