/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.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 23:01:46,396 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 23:01:46,399 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 23:01:46,436 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 23:01:46,437 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 23:01:46,438 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 23:01:46,440 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 23:01:46,443 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 23:01:46,445 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 23:01:46,446 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 23:01:46,448 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 23:01:46,449 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 23:01:46,450 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 23:01:46,451 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 23:01:46,452 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 23:01:46,454 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 23:01:46,455 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 23:01:46,456 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 23:01:46,458 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 23:01:46,460 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 23:01:46,462 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 23:01:46,467 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 23:01:46,468 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 23:01:46,469 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 23:01:46,472 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 23:01:46,484 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 23:01:46,485 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 23:01:46,486 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 23:01:46,488 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 23:01:46,534 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 23:01:46,535 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 23:01:46,538 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 23:01:46,538 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 23:01:46,538 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 23:01:46,539 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 23:01:46,541 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 23:01:46,541 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 23:01:46,541 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 23:01:46,541 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 23:01:46,542 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 23:01:46,543 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 23:01:46,543 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 23:01:46,543 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 23:01:46,543 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 23:01:46,544 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 23:01:46,544 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 23:01:46,544 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 23:01:46,544 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 23:01:46,545 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 23:01:46,545 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 23:01:46,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 23:01:46,545 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 23:01:46,546 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 23:01:46,546 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 23:01:46,546 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 23:01:46,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 23:01:46,547 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 23:01:46,547 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 23:01:46,547 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 23:01:47,018 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 23:01:47,049 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 23:01:47,052 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 23:01:47,053 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 23:01:47,054 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 23:01:47,055 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-11-06 23:01:47,155 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78033e55d/e8e4ed68b7c64ba9a407fec154240588/FLAG16c7b4864 [2020-11-06 23:01:47,975 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 23:01:47,976 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-11-06 23:01:48,000 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78033e55d/e8e4ed68b7c64ba9a407fec154240588/FLAG16c7b4864 [2020-11-06 23:01:48,164 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78033e55d/e8e4ed68b7c64ba9a407fec154240588 [2020-11-06 23:01:48,167 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 23:01:48,174 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 23:01:48,176 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 23:01:48,177 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 23:01:48,181 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 23:01:48,181 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:01:48" (1/1) ... [2020-11-06 23:01:48,185 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d5bea9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:48, skipping insertion in model container [2020-11-06 23:01:48,185 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:01:48" (1/1) ... [2020-11-06 23:01:48,194 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 23:01:48,296 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 23:01:49,205 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 23:01:49,229 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 23:01:49,714 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 23:01:49,739 INFO L208 MainTranslator]: Completed translation [2020-11-06 23:01:49,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:49 WrapperNode [2020-11-06 23:01:49,740 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 23:01:49,741 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 23:01:49,742 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 23:01:49,742 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 23:01:49,757 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:49" (1/1) ... [2020-11-06 23:01:49,757 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:49" (1/1) ... [2020-11-06 23:01:49,783 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:49" (1/1) ... [2020-11-06 23:01:49,784 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:49" (1/1) ... [2020-11-06 23:01:49,856 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:49" (1/1) ... [2020-11-06 23:01:49,893 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:49" (1/1) ... [2020-11-06 23:01:49,905 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:49" (1/1) ... [2020-11-06 23:01:49,929 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 23:01:49,930 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 23:01:49,930 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 23:01:49,930 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 23:01:49,932 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:49" (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 23:01:50,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 23:01:50,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 23:01:50,024 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 23:01:50,024 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-06 23:01:50,024 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 23:01:50,025 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 23:01:50,025 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 23:01:50,026 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 23:01:50,026 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 23:01:50,026 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-11-06 23:01:50,026 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-11-06 23:01:50,027 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-11-06 23:01:50,027 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-06 23:01:50,028 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-11-06 23:01:50,028 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-11-06 23:01:50,029 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-11-06 23:01:50,029 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-11-06 23:01:50,030 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-11-06 23:01:50,030 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-11-06 23:01:50,030 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-11-06 23:01:50,030 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-11-06 23:01:50,030 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 23:01:50,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 23:01:50,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 23:01:50,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 23:01:50,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 23:01:50,031 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 23:01:50,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 23:01:53,010 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 23:01:53,010 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-06 23:01:53,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:01:53 BoogieIcfgContainer [2020-11-06 23:01:53,014 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 23:01:53,018 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 23:01:53,019 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 23:01:53,024 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 23:01:53,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:01:48" (1/3) ... [2020-11-06 23:01:53,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f7016cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:01:53, skipping insertion in model container [2020-11-06 23:01:53,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:49" (2/3) ... [2020-11-06 23:01:53,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f7016cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:01:53, skipping insertion in model container [2020-11-06 23:01:53,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:01:53" (3/3) ... [2020-11-06 23:01:53,028 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-11-06 23:01:53,045 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 23:01:53,050 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 23:01:53,064 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 23:01:53,118 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 23:01:53,118 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 23:01:53,118 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 23:01:53,118 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 23:01:53,118 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 23:01:53,118 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 23:01:53,118 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 23:01:53,118 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 23:01:53,169 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states. [2020-11-06 23:01:53,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-11-06 23:01:53,210 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:01:53,211 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] [2020-11-06 23:01:53,212 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:01:53,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:01:53,218 INFO L82 PathProgramCache]: Analyzing trace with hash -540047237, now seen corresponding path program 1 times [2020-11-06 23:01:53,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:01:53,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144589826] [2020-11-06 23:01:53,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:01:53,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:01:55,086 WARN L194 SmtUtils]: Spent 734.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-11-06 23:01:55,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:01:55,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:01:55,326 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 23:01:55,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144589826] [2020-11-06 23:01:55,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:01:55,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:01:55,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805248855] [2020-11-06 23:01:55,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:01:55,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:01:55,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:01:55,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:01:55,362 INFO L87 Difference]: Start difference. First operand 799 states. Second operand 4 states. [2020-11-06 23:01:56,277 WARN L194 SmtUtils]: Spent 830.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2020-11-06 23:02:02,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:02:02,254 INFO L93 Difference]: Finished difference Result 1496 states and 2629 transitions. [2020-11-06 23:02:02,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:02:02,256 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 325 [2020-11-06 23:02:02,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:02:02,288 INFO L225 Difference]: With dead ends: 1496 [2020-11-06 23:02:02,288 INFO L226 Difference]: Without dead ends: 1286 [2020-11-06 23:02:02,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:02:02,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2020-11-06 23:02:02,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 1283. [2020-11-06 23:02:02,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1283 states. [2020-11-06 23:02:02,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 2006 transitions. [2020-11-06 23:02:02,465 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 2006 transitions. Word has length 325 [2020-11-06 23:02:02,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:02:02,467 INFO L481 AbstractCegarLoop]: Abstraction has 1283 states and 2006 transitions. [2020-11-06 23:02:02,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:02:02,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 2006 transitions. [2020-11-06 23:02:02,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-11-06 23:02:02,476 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:02:02,477 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] [2020-11-06 23:02:02,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 23:02:02,477 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:02:02,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:02:02,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1948349173, now seen corresponding path program 1 times [2020-11-06 23:02:02,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:02:02,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900512014] [2020-11-06 23:02:02,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:02:02,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:03,682 WARN L194 SmtUtils]: Spent 860.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-11-06 23:02:03,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:02:03,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:03,889 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 23:02:03,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900512014] [2020-11-06 23:02:03,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:02:03,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:02:03,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475111364] [2020-11-06 23:02:03,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:02:03,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:02:03,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:02:03,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:02:03,899 INFO L87 Difference]: Start difference. First operand 1283 states and 2006 transitions. Second operand 4 states. [2020-11-06 23:02:04,633 WARN L194 SmtUtils]: Spent 678.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2020-11-06 23:02:09,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:02:09,434 INFO L93 Difference]: Finished difference Result 2615 states and 4121 transitions. [2020-11-06 23:02:09,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:02:09,436 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 325 [2020-11-06 23:02:09,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:02:09,452 INFO L225 Difference]: With dead ends: 2615 [2020-11-06 23:02:09,453 INFO L226 Difference]: Without dead ends: 2250 [2020-11-06 23:02:09,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:02:09,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2250 states. [2020-11-06 23:02:09,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2250 to 2247. [2020-11-06 23:02:09,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2247 states. [2020-11-06 23:02:09,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 3508 transitions. [2020-11-06 23:02:09,567 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 3508 transitions. Word has length 325 [2020-11-06 23:02:09,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:02:09,569 INFO L481 AbstractCegarLoop]: Abstraction has 2247 states and 3508 transitions. [2020-11-06 23:02:09,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:02:09,569 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 3508 transitions. [2020-11-06 23:02:09,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-11-06 23:02:09,579 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:02:09,579 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] [2020-11-06 23:02:09,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 23:02:09,580 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:02:09,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:02:09,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1821978594, now seen corresponding path program 1 times [2020-11-06 23:02:09,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:02:09,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639007941] [2020-11-06 23:02:09,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:02:09,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:10,469 WARN L194 SmtUtils]: Spent 670.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-11-06 23:02:10,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:02:10,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:10,663 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 23:02:10,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639007941] [2020-11-06 23:02:10,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:02:10,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:02:10,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614982930] [2020-11-06 23:02:10,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:02:10,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:02:10,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:02:10,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:02:10,669 INFO L87 Difference]: Start difference. First operand 2247 states and 3508 transitions. Second operand 4 states. [2020-11-06 23:02:11,450 WARN L194 SmtUtils]: Spent 730.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2020-11-06 23:02:16,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:02:16,186 INFO L93 Difference]: Finished difference Result 4825 states and 7596 transitions. [2020-11-06 23:02:16,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:02:16,187 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 325 [2020-11-06 23:02:16,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:02:16,209 INFO L225 Difference]: With dead ends: 4825 [2020-11-06 23:02:16,210 INFO L226 Difference]: Without dead ends: 4142 [2020-11-06 23:02:16,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:02:16,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4142 states. [2020-11-06 23:02:16,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4142 to 4139. [2020-11-06 23:02:16,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4139 states. [2020-11-06 23:02:16,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4139 states to 4139 states and 6448 transitions. [2020-11-06 23:02:16,382 INFO L78 Accepts]: Start accepts. Automaton has 4139 states and 6448 transitions. Word has length 325 [2020-11-06 23:02:16,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:02:16,383 INFO L481 AbstractCegarLoop]: Abstraction has 4139 states and 6448 transitions. [2020-11-06 23:02:16,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:02:16,384 INFO L276 IsEmpty]: Start isEmpty. Operand 4139 states and 6448 transitions. [2020-11-06 23:02:16,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-11-06 23:02:16,395 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:02:16,395 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] [2020-11-06 23:02:16,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-06 23:02:16,396 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:02:16,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:02:16,397 INFO L82 PathProgramCache]: Analyzing trace with hash 479714806, now seen corresponding path program 1 times [2020-11-06 23:02:16,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:02:16,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685072407] [2020-11-06 23:02:16,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:02:16,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:17,361 WARN L194 SmtUtils]: Spent 658.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-11-06 23:02:17,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:02:17,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:17,567 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 23:02:17,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685072407] [2020-11-06 23:02:17,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:02:17,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:02:17,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369063076] [2020-11-06 23:02:17,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:02:17,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:02:17,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:02:17,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:02:17,571 INFO L87 Difference]: Start difference. First operand 4139 states and 6448 transitions. Second operand 4 states. [2020-11-06 23:02:18,294 WARN L194 SmtUtils]: Spent 667.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2020-11-06 23:02:22,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:02:22,871 INFO L93 Difference]: Finished difference Result 9129 states and 14344 transitions. [2020-11-06 23:02:22,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:02:22,879 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 325 [2020-11-06 23:02:22,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:02:22,917 INFO L225 Difference]: With dead ends: 9129 [2020-11-06 23:02:22,917 INFO L226 Difference]: Without dead ends: 7854 [2020-11-06 23:02:22,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:02:22,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7854 states. [2020-11-06 23:02:23,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7854 to 7851. [2020-11-06 23:02:23,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7851 states. [2020-11-06 23:02:23,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7851 states to 7851 states and 12200 transitions. [2020-11-06 23:02:23,187 INFO L78 Accepts]: Start accepts. Automaton has 7851 states and 12200 transitions. Word has length 325 [2020-11-06 23:02:23,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:02:23,188 INFO L481 AbstractCegarLoop]: Abstraction has 7851 states and 12200 transitions. [2020-11-06 23:02:23,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:02:23,188 INFO L276 IsEmpty]: Start isEmpty. Operand 7851 states and 12200 transitions. [2020-11-06 23:02:23,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-11-06 23:02:23,203 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:02:23,203 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] [2020-11-06 23:02:23,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-06 23:02:23,204 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:02:23,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:02:23,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1772496259, now seen corresponding path program 1 times [2020-11-06 23:02:23,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:02:23,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935393377] [2020-11-06 23:02:23,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:02:23,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:24,629 WARN L194 SmtUtils]: Spent 721.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-11-06 23:02:24,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:02:24,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:24,830 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 23:02:24,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935393377] [2020-11-06 23:02:24,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:02:24,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:02:24,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265080785] [2020-11-06 23:02:24,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:02:24,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:02:24,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:02:24,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:02:24,833 INFO L87 Difference]: Start difference. First operand 7851 states and 12200 transitions. Second operand 5 states. [2020-11-06 23:02:31,702 WARN L194 SmtUtils]: Spent 743.00 ms on a formula simplification that was a NOOP. DAG size: 319 [2020-11-06 23:02:33,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:02:33,816 INFO L93 Difference]: Finished difference Result 23226 states and 36057 transitions. [2020-11-06 23:02:33,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:02:33,817 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 325 [2020-11-06 23:02:33,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:02:33,884 INFO L225 Difference]: With dead ends: 23226 [2020-11-06 23:02:33,885 INFO L226 Difference]: Without dead ends: 15390 [2020-11-06 23:02:33,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:02:33,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15390 states. [2020-11-06 23:02:34,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15390 to 15387. [2020-11-06 23:02:34,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15387 states. [2020-11-06 23:02:34,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15387 states to 15387 states and 23773 transitions. [2020-11-06 23:02:34,532 INFO L78 Accepts]: Start accepts. Automaton has 15387 states and 23773 transitions. Word has length 325 [2020-11-06 23:02:34,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:02:34,533 INFO L481 AbstractCegarLoop]: Abstraction has 15387 states and 23773 transitions. [2020-11-06 23:02:34,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:02:34,533 INFO L276 IsEmpty]: Start isEmpty. Operand 15387 states and 23773 transitions. [2020-11-06 23:02:34,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-11-06 23:02:34,563 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:02:34,563 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] [2020-11-06 23:02:34,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-06 23:02:34,564 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:02:34,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:02:34,569 INFO L82 PathProgramCache]: Analyzing trace with hash -2109001558, now seen corresponding path program 1 times [2020-11-06 23:02:34,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:02:34,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492113913] [2020-11-06 23:02:34,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:02:34,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:35,497 WARN L194 SmtUtils]: Spent 722.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-11-06 23:02:35,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:02:35,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:35,699 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 23:02:35,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492113913] [2020-11-06 23:02:35,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:02:35,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:02:35,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815446561] [2020-11-06 23:02:35,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:02:35,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:02:35,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:02:35,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:02:35,702 INFO L87 Difference]: Start difference. First operand 15387 states and 23773 transitions. Second operand 4 states. [2020-11-06 23:02:44,373 WARN L194 SmtUtils]: Spent 831.00 ms on a formula simplification that was a NOOP. DAG size: 318 [2020-11-06 23:02:46,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:02:46,462 INFO L93 Difference]: Finished difference Result 45422 states and 70075 transitions. [2020-11-06 23:02:46,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:02:46,463 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-11-06 23:02:46,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:02:46,536 INFO L225 Difference]: With dead ends: 45422 [2020-11-06 23:02:46,536 INFO L226 Difference]: Without dead ends: 30164 [2020-11-06 23:02:46,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:02:46,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30164 states. [2020-11-06 23:02:47,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30164 to 30161. [2020-11-06 23:02:47,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30161 states. [2020-11-06 23:02:47,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30161 states to 30161 states and 46322 transitions. [2020-11-06 23:02:47,681 INFO L78 Accepts]: Start accepts. Automaton has 30161 states and 46322 transitions. Word has length 327 [2020-11-06 23:02:47,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:02:47,681 INFO L481 AbstractCegarLoop]: Abstraction has 30161 states and 46322 transitions. [2020-11-06 23:02:47,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:02:47,681 INFO L276 IsEmpty]: Start isEmpty. Operand 30161 states and 46322 transitions. [2020-11-06 23:02:47,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-11-06 23:02:47,741 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:02:47,741 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] [2020-11-06 23:02:47,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-06 23:02:47,742 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:02:47,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:02:47,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1610721851, now seen corresponding path program 1 times [2020-11-06 23:02:47,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:02:47,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094799389] [2020-11-06 23:02:47,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:02:47,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:48,635 WARN L194 SmtUtils]: Spent 762.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-11-06 23:02:48,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:02:48,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:48,752 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 23:02:48,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094799389] [2020-11-06 23:02:48,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:02:48,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:02:48,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963333263] [2020-11-06 23:02:48,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:02:48,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:02:48,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:02:48,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:02:48,760 INFO L87 Difference]: Start difference. First operand 30161 states and 46322 transitions. Second operand 4 states. [2020-11-06 23:02:59,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:02:59,465 INFO L93 Difference]: Finished difference Result 90406 states and 138841 transitions. [2020-11-06 23:02:59,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 23:02:59,469 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-11-06 23:02:59,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:02:59,670 INFO L225 Difference]: With dead ends: 90406 [2020-11-06 23:02:59,671 INFO L226 Difference]: Without dead ends: 60287 [2020-11-06 23:02:59,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:02:59,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60287 states. [2020-11-06 23:03:01,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60287 to 30180. [2020-11-06 23:03:01,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30180 states. [2020-11-06 23:03:01,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30180 states to 30180 states and 46350 transitions. [2020-11-06 23:03:01,549 INFO L78 Accepts]: Start accepts. Automaton has 30180 states and 46350 transitions. Word has length 327 [2020-11-06 23:03:01,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:03:01,549 INFO L481 AbstractCegarLoop]: Abstraction has 30180 states and 46350 transitions. [2020-11-06 23:03:01,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:03:01,549 INFO L276 IsEmpty]: Start isEmpty. Operand 30180 states and 46350 transitions. [2020-11-06 23:03:01,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-11-06 23:03:01,610 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:03:01,611 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 23:03:01,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-06 23:03:01,611 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:03:01,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:03:01,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1243961186, now seen corresponding path program 1 times [2020-11-06 23:03:01,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:03:01,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525980289] [2020-11-06 23:03:01,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:03:01,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:02,350 WARN L194 SmtUtils]: Spent 593.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-11-06 23:03:02,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:03:02,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:02,463 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 23:03:02,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525980289] [2020-11-06 23:03:02,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:03:02,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:03:02,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68100944] [2020-11-06 23:03:02,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:03:02,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:03:02,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:03:02,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:03:02,473 INFO L87 Difference]: Start difference. First operand 30180 states and 46350 transitions. Second operand 4 states. [2020-11-06 23:03:13,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:03:13,387 INFO L93 Difference]: Finished difference Result 90425 states and 138862 transitions. [2020-11-06 23:03:13,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 23:03:13,389 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-11-06 23:03:13,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:03:13,515 INFO L225 Difference]: With dead ends: 90425 [2020-11-06 23:03:13,516 INFO L226 Difference]: Without dead ends: 60305 [2020-11-06 23:03:13,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:03:13,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60305 states. [2020-11-06 23:03:14,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60305 to 30198. [2020-11-06 23:03:14,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30198 states. [2020-11-06 23:03:14,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30198 states to 30198 states and 46371 transitions. [2020-11-06 23:03:14,940 INFO L78 Accepts]: Start accepts. Automaton has 30198 states and 46371 transitions. Word has length 328 [2020-11-06 23:03:14,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:03:14,941 INFO L481 AbstractCegarLoop]: Abstraction has 30198 states and 46371 transitions. [2020-11-06 23:03:14,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:03:14,941 INFO L276 IsEmpty]: Start isEmpty. Operand 30198 states and 46371 transitions. [2020-11-06 23:03:14,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-11-06 23:03:14,970 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:03:14,971 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] [2020-11-06 23:03:14,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-06 23:03:14,971 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:03:14,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:03:14,971 INFO L82 PathProgramCache]: Analyzing trace with hash -974279761, now seen corresponding path program 1 times [2020-11-06 23:03:14,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:03:14,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133438010] [2020-11-06 23:03:14,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:03:15,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:15,842 WARN L194 SmtUtils]: Spent 694.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-11-06 23:03:15,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:03:15,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:16,250 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 23:03:16,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133438010] [2020-11-06 23:03:16,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:03:16,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:03:16,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211939491] [2020-11-06 23:03:16,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:03:16,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:03:16,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:03:16,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:03:16,253 INFO L87 Difference]: Start difference. First operand 30198 states and 46371 transitions. Second operand 4 states. [2020-11-06 23:03:25,626 WARN L194 SmtUtils]: Spent 823.00 ms on a formula simplification that was a NOOP. DAG size: 318 [2020-11-06 23:03:27,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:03:27,950 INFO L93 Difference]: Finished difference Result 85719 states and 131396 transitions. [2020-11-06 23:03:27,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:03:27,951 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 329 [2020-11-06 23:03:27,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:03:28,046 INFO L225 Difference]: With dead ends: 85719 [2020-11-06 23:03:28,047 INFO L226 Difference]: Without dead ends: 55766 [2020-11-06 23:03:28,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:03:28,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55766 states. [2020-11-06 23:03:30,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55766 to 55763. [2020-11-06 23:03:30,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55763 states. [2020-11-06 23:03:30,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55763 states to 55763 states and 85029 transitions. [2020-11-06 23:03:30,565 INFO L78 Accepts]: Start accepts. Automaton has 55763 states and 85029 transitions. Word has length 329 [2020-11-06 23:03:30,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:03:30,565 INFO L481 AbstractCegarLoop]: Abstraction has 55763 states and 85029 transitions. [2020-11-06 23:03:30,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:03:30,565 INFO L276 IsEmpty]: Start isEmpty. Operand 55763 states and 85029 transitions. [2020-11-06 23:03:30,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-11-06 23:03:30,611 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:03:30,612 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] [2020-11-06 23:03:30,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-06 23:03:30,612 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:03:30,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:03:30,613 INFO L82 PathProgramCache]: Analyzing trace with hash -822224782, now seen corresponding path program 1 times [2020-11-06 23:03:30,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:03:30,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388284348] [2020-11-06 23:03:30,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:03:30,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:31,738 WARN L194 SmtUtils]: Spent 654.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-11-06 23:03:31,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:03:31,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:32,026 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 23:03:32,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388284348] [2020-11-06 23:03:32,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:03:32,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:03:32,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114513681] [2020-11-06 23:03:32,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:03:32,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:03:32,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:03:32,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:03:32,029 INFO L87 Difference]: Start difference. First operand 55763 states and 85029 transitions. Second operand 5 states. [2020-11-06 23:03:41,484 WARN L194 SmtUtils]: Spent 830.00 ms on a formula simplification that was a NOOP. DAG size: 319 [2020-11-06 23:03:44,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:03:44,675 INFO L93 Difference]: Finished difference Result 164669 states and 250700 transitions. [2020-11-06 23:03:44,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:03:44,676 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 329 [2020-11-06 23:03:44,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:03:44,981 INFO L225 Difference]: With dead ends: 164669 [2020-11-06 23:03:44,981 INFO L226 Difference]: Without dead ends: 108965 [2020-11-06 23:03:45,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:03:45,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108965 states. [2020-11-06 23:03:49,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108965 to 108962. [2020-11-06 23:03:49,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108962 states. [2020-11-06 23:03:50,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108962 states to 108962 states and 164964 transitions. [2020-11-06 23:03:50,011 INFO L78 Accepts]: Start accepts. Automaton has 108962 states and 164964 transitions. Word has length 329 [2020-11-06 23:03:50,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:03:50,011 INFO L481 AbstractCegarLoop]: Abstraction has 108962 states and 164964 transitions. [2020-11-06 23:03:50,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:03:50,011 INFO L276 IsEmpty]: Start isEmpty. Operand 108962 states and 164964 transitions. [2020-11-06 23:03:50,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-11-06 23:03:50,333 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:03:50,333 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 23:03:50,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-06 23:03:50,333 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:03:50,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:03:50,334 INFO L82 PathProgramCache]: Analyzing trace with hash -953910148, now seen corresponding path program 1 times [2020-11-06 23:03:50,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:03:50,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773105576] [2020-11-06 23:03:50,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:03:50,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:51,501 WARN L194 SmtUtils]: Spent 665.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-11-06 23:03:51,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:03:51,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:51,811 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 23:03:51,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773105576] [2020-11-06 23:03:51,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:03:51,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:03:51,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422967572] [2020-11-06 23:03:51,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:03:51,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:03:51,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:03:51,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:03:51,814 INFO L87 Difference]: Start difference. First operand 108962 states and 164964 transitions. Second operand 5 states. [2020-11-06 23:04:03,998 WARN L194 SmtUtils]: Spent 841.00 ms on a formula simplification that was a NOOP. DAG size: 319 [2020-11-06 23:04:08,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:04:08,852 INFO L93 Difference]: Finished difference Result 321743 states and 486225 transitions. [2020-11-06 23:04:08,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:04:08,853 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 331 [2020-11-06 23:04:08,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:04:09,322 INFO L225 Difference]: With dead ends: 321743 [2020-11-06 23:04:09,323 INFO L226 Difference]: Without dead ends: 212902 [2020-11-06 23:04:09,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:04:09,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212902 states. [2020-11-06 23:04:19,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212902 to 212899. [2020-11-06 23:04:19,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212899 states. [2020-11-06 23:04:19,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212899 states to 212899 states and 319813 transitions. [2020-11-06 23:04:19,674 INFO L78 Accepts]: Start accepts. Automaton has 212899 states and 319813 transitions. Word has length 331 [2020-11-06 23:04:19,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:04:19,674 INFO L481 AbstractCegarLoop]: Abstraction has 212899 states and 319813 transitions. [2020-11-06 23:04:19,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:04:19,674 INFO L276 IsEmpty]: Start isEmpty. Operand 212899 states and 319813 transitions. [2020-11-06 23:04:20,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-11-06 23:04:20,138 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:04:20,138 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 23:04:20,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-06 23:04:20,139 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:04:20,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:04:20,139 INFO L82 PathProgramCache]: Analyzing trace with hash -2020014146, now seen corresponding path program 1 times [2020-11-06 23:04:20,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:04:20,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739506697] [2020-11-06 23:04:20,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:04:20,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:21,475 WARN L194 SmtUtils]: Spent 973.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-11-06 23:04:21,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:04:21,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:21,649 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 23:04:21,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739506697] [2020-11-06 23:04:21,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:04:21,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:04:21,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116457280] [2020-11-06 23:04:21,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:04:21,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:04:21,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:04:21,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:04:21,652 INFO L87 Difference]: Start difference. First operand 212899 states and 319813 transitions. Second operand 5 states. [2020-11-06 23:04:40,447 WARN L194 SmtUtils]: Spent 749.00 ms on a formula simplification that was a NOOP. DAG size: 319 [2020-11-06 23:04:48,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:04:48,825 INFO L93 Difference]: Finished difference Result 629295 states and 943772 transitions. [2020-11-06 23:04:48,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:04:48,826 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 331 [2020-11-06 23:04:48,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:04:49,745 INFO L225 Difference]: With dead ends: 629295 [2020-11-06 23:04:49,745 INFO L226 Difference]: Without dead ends: 416630 [2020-11-06 23:04:49,902 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 23:04:50,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416630 states. [2020-11-06 23:05:09,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416630 to 416627. [2020-11-06 23:05:09,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 416627 states. [2020-11-06 23:05:11,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416627 states to 416627 states and 621253 transitions. [2020-11-06 23:05:11,168 INFO L78 Accepts]: Start accepts. Automaton has 416627 states and 621253 transitions. Word has length 331 [2020-11-06 23:05:11,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:05:11,169 INFO L481 AbstractCegarLoop]: Abstraction has 416627 states and 621253 transitions. [2020-11-06 23:05:11,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:05:11,169 INFO L276 IsEmpty]: Start isEmpty. Operand 416627 states and 621253 transitions. [2020-11-06 23:05:11,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-11-06 23:05:11,531 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:05:11,532 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] [2020-11-06 23:05:11,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-06 23:05:11,532 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:05:11,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:05:11,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1193282924, now seen corresponding path program 1 times [2020-11-06 23:05:11,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:05:11,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863595623] [2020-11-06 23:05:11,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:05:11,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:05:12,717 WARN L194 SmtUtils]: Spent 1.02 s on a formula simplification that was a NOOP. DAG size: 313 [2020-11-06 23:05:12,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:05:12,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:05:12,862 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 23:05:12,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863595623] [2020-11-06 23:05:12,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:05:12,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:05:12,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124449772] [2020-11-06 23:05:12,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:05:12,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:05:12,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:05:12,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:05:12,865 INFO L87 Difference]: Start difference. First operand 416627 states and 621253 transitions. Second operand 4 states.