/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.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 19:01:38,536 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 19:01:38,539 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 19:01:38,581 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 19:01:38,582 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 19:01:38,585 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 19:01:38,588 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 19:01:38,596 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 19:01:38,599 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 19:01:38,604 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 19:01:38,605 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 19:01:38,607 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 19:01:38,607 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 19:01:38,610 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 19:01:38,612 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 19:01:38,613 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 19:01:38,614 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 19:01:38,617 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 19:01:38,623 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 19:01:38,634 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 19:01:38,638 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 19:01:38,640 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 19:01:38,641 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 19:01:38,644 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 19:01:38,650 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 19:01:38,665 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 19:01:38,666 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 19:01:38,666 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 19:01:38,667 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 [2020-10-23 19:01:38,716 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 19:01:38,717 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 19:01:38,720 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 19:01:38,721 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 19:01:38,721 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 19:01:38,721 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 19:01:38,721 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 19:01:38,721 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 19:01:38,722 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 19:01:38,722 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 19:01:38,723 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 19:01:38,723 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 19:01:38,724 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 19:01:38,724 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 19:01:38,724 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 19:01:38,724 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 19:01:38,724 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 19:01:38,725 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 19:01:38,725 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 19:01:38,725 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 19:01:38,725 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 19:01:38,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 19:01:38,726 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 19:01:38,726 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 19:01:38,726 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 19:01:38,726 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 19:01:38,727 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 19:01:38,727 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 19:01:38,727 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 19:01:38,727 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 19:01:39,109 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 19:01:39,148 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 19:01:39,151 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 19:01:39,152 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 19:01:39,153 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 19:01:39,154 INFO L432 ainManager$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.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-23 19:01:39,255 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef7f9e554/a39c3b89615f43bfaefb9f18023dfebd/FLAG5dd3497ab [2020-10-23 19:01:40,177 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 19:01:40,178 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-23 19:01:40,205 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef7f9e554/a39c3b89615f43bfaefb9f18023dfebd/FLAG5dd3497ab [2020-10-23 19:01:40,718 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef7f9e554/a39c3b89615f43bfaefb9f18023dfebd [2020-10-23 19:01:40,721 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 19:01:40,728 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 19:01:40,730 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 19:01:40,731 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 19:01:40,737 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 19:01:40,738 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 07:01:40" (1/1) ... [2020-10-23 19:01:40,743 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6db1406e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:01:40, skipping insertion in model container [2020-10-23 19:01:40,743 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 07:01:40" (1/1) ... [2020-10-23 19:01:40,753 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 19:01:40,958 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 19:01:42,338 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 19:01:42,363 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 19:01:43,172 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 19:01:43,214 INFO L208 MainTranslator]: Completed translation [2020-10-23 19:01:43,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:01:43 WrapperNode [2020-10-23 19:01:43,215 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 19:01:43,216 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 19:01:43,216 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 19:01:43,216 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 19:01:43,227 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:01:43" (1/1) ... [2020-10-23 19:01:43,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:01:43" (1/1) ... [2020-10-23 19:01:43,262 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:01:43" (1/1) ... [2020-10-23 19:01:43,263 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:01:43" (1/1) ... [2020-10-23 19:01:43,330 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:01:43" (1/1) ... [2020-10-23 19:01:43,376 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:01:43" (1/1) ... [2020-10-23 19:01:43,390 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:01:43" (1/1) ... [2020-10-23 19:01:43,408 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 19:01:43,409 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 19:01:43,409 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 19:01:43,409 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 19:01:43,410 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:01:43" (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 [2020-10-23 19:01:43,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 19:01:43,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 19:01:43,512 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 19:01:43,512 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 19:01:43,513 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 19:01:43,513 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 19:01:43,513 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 19:01:43,514 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 19:01:43,514 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 19:01:43,514 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-23 19:01:43,514 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-23 19:01:43,515 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-23 19:01:43,515 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-23 19:01:43,516 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 19:01:43,516 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-23 19:01:43,517 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-23 19:01:43,517 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-23 19:01:43,517 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-23 19:01:43,517 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-23 19:01:43,517 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-23 19:01:43,517 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-23 19:01:43,518 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-23 19:01:43,518 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 19:01:43,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 19:01:43,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 19:01:43,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 19:01:43,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 19:01:43,518 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 19:01:43,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 19:01:47,508 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 19:01:47,509 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 19:01:47,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 07:01:47 BoogieIcfgContainer [2020-10-23 19:01:47,513 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 19:01:47,514 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 19:01:47,515 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 19:01:47,518 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 19:01:47,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 07:01:40" (1/3) ... [2020-10-23 19:01:47,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66b3b396 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 07:01:47, skipping insertion in model container [2020-10-23 19:01:47,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:01:43" (2/3) ... [2020-10-23 19:01:47,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66b3b396 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 07:01:47, skipping insertion in model container [2020-10-23 19:01:47,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 07:01:47" (3/3) ... [2020-10-23 19:01:47,522 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-23 19:01:47,534 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 19:01:47,540 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 19:01:47,554 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 19:01:47,587 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 19:01:47,587 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 19:01:47,587 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 19:01:47,587 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 19:01:47,588 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 19:01:47,588 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 19:01:47,588 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 19:01:47,588 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 19:01:47,624 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states. [2020-10-23 19:01:47,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-23 19:01:47,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:01:47,659 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] [2020-10-23 19:01:47,660 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:01:47,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:01:47,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1028546938, now seen corresponding path program 1 times [2020-10-23 19:01:47,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:01:47,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488994053] [2020-10-23 19:01:47,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:01:48,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:01:49,418 WARN L193 SmtUtils]: Spent 754.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-23 19:01:49,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:01:49,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:01:49,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:01:49,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488994053] [2020-10-23 19:01:49,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:01:49,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:01:49,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570361694] [2020-10-23 19:01:49,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:01:49,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:01:49,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:01:49,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:01:49,801 INFO L87 Difference]: Start difference. First operand 1020 states. Second operand 4 states. [2020-10-23 19:01:50,770 WARN L193 SmtUtils]: Spent 873.00 ms on a formula simplification that was a NOOP. DAG size: 353 [2020-10-23 19:01:59,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:01:59,413 INFO L93 Difference]: Finished difference Result 1778 states and 3166 transitions. [2020-10-23 19:01:59,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:01:59,417 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 325 [2020-10-23 19:01:59,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:01:59,448 INFO L225 Difference]: With dead ends: 1778 [2020-10-23 19:01:59,448 INFO L226 Difference]: Without dead ends: 1472 [2020-10-23 19:01:59,455 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 [2020-10-23 19:01:59,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1472 states. [2020-10-23 19:01:59,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1472 to 1469. [2020-10-23 19:01:59,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1469 states. [2020-10-23 19:01:59,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1469 states to 1469 states and 2267 transitions. [2020-10-23 19:01:59,636 INFO L78 Accepts]: Start accepts. Automaton has 1469 states and 2267 transitions. Word has length 325 [2020-10-23 19:01:59,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:01:59,643 INFO L481 AbstractCegarLoop]: Abstraction has 1469 states and 2267 transitions. [2020-10-23 19:01:59,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:01:59,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1469 states and 2267 transitions. [2020-10-23 19:01:59,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-23 19:01:59,660 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:01:59,661 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] [2020-10-23 19:01:59,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 19:01:59,662 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:01:59,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:01:59,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1524659108, now seen corresponding path program 1 times [2020-10-23 19:01:59,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:01:59,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606154200] [2020-10-23 19:01:59,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:02:00,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:01,552 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification that was a NOOP. DAG size: 352 [2020-10-23 19:02:01,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:02:01,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:01,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:02:01,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606154200] [2020-10-23 19:02:01,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:02:01,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 19:02:01,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041294274] [2020-10-23 19:02:01,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 19:02:01,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:02:01,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 19:02:01,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:02:01,843 INFO L87 Difference]: Start difference. First operand 1469 states and 2267 transitions. Second operand 5 states. [2020-10-23 19:02:11,064 WARN L193 SmtUtils]: Spent 918.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-23 19:02:13,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:02:13,658 INFO L93 Difference]: Finished difference Result 4333 states and 6680 transitions. [2020-10-23 19:02:13,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 19:02:13,662 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 325 [2020-10-23 19:02:13,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:02:13,679 INFO L225 Difference]: With dead ends: 4333 [2020-10-23 19:02:13,679 INFO L226 Difference]: Without dead ends: 2879 [2020-10-23 19:02:13,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 19:02:13,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2879 states. [2020-10-23 19:02:13,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2879 to 2785. [2020-10-23 19:02:13,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2785 states. [2020-10-23 19:02:13,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2785 states to 2785 states and 4286 transitions. [2020-10-23 19:02:13,811 INFO L78 Accepts]: Start accepts. Automaton has 2785 states and 4286 transitions. Word has length 325 [2020-10-23 19:02:13,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:02:13,811 INFO L481 AbstractCegarLoop]: Abstraction has 2785 states and 4286 transitions. [2020-10-23 19:02:13,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 19:02:13,812 INFO L276 IsEmpty]: Start isEmpty. Operand 2785 states and 4286 transitions. [2020-10-23 19:02:13,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-10-23 19:02:13,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:02:13,822 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] [2020-10-23 19:02:13,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 19:02:13,822 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:02:13,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:02:13,824 INFO L82 PathProgramCache]: Analyzing trace with hash -435041296, now seen corresponding path program 1 times [2020-10-23 19:02:13,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:02:13,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254906628] [2020-10-23 19:02:13,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:02:13,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:14,987 WARN L193 SmtUtils]: Spent 945.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-23 19:02:14,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:02:14,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:15,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:02:15,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254906628] [2020-10-23 19:02:15,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:02:15,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:02:15,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236117760] [2020-10-23 19:02:15,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:02:15,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:02:15,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:02:15,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:02:15,163 INFO L87 Difference]: Start difference. First operand 2785 states and 4286 transitions. Second operand 4 states. [2020-10-23 19:02:25,674 WARN L193 SmtUtils]: Spent 911.00 ms on a formula simplification that was a NOOP. DAG size: 357 [2020-10-23 19:02:28,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:02:28,165 INFO L93 Difference]: Finished difference Result 8121 states and 12456 transitions. [2020-10-23 19:02:28,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:02:28,166 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-10-23 19:02:28,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:02:28,195 INFO L225 Difference]: With dead ends: 8121 [2020-10-23 19:02:28,196 INFO L226 Difference]: Without dead ends: 5465 [2020-10-23 19:02:28,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:02:28,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5465 states. [2020-10-23 19:02:28,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5465 to 5371. [2020-10-23 19:02:28,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5371 states. [2020-10-23 19:02:28,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5371 states to 5371 states and 8231 transitions. [2020-10-23 19:02:28,483 INFO L78 Accepts]: Start accepts. Automaton has 5371 states and 8231 transitions. Word has length 327 [2020-10-23 19:02:28,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:02:28,483 INFO L481 AbstractCegarLoop]: Abstraction has 5371 states and 8231 transitions. [2020-10-23 19:02:28,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:02:28,484 INFO L276 IsEmpty]: Start isEmpty. Operand 5371 states and 8231 transitions. [2020-10-23 19:02:28,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-10-23 19:02:28,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:02:28,499 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] [2020-10-23 19:02:28,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 19:02:28,500 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:02:28,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:02:28,501 INFO L82 PathProgramCache]: Analyzing trace with hash 63238411, now seen corresponding path program 1 times [2020-10-23 19:02:28,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:02:28,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339570477] [2020-10-23 19:02:28,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:02:28,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:29,489 WARN L193 SmtUtils]: Spent 845.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-23 19:02:29,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:02:29,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:29,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:02:29,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339570477] [2020-10-23 19:02:29,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:02:29,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:02:29,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298627174] [2020-10-23 19:02:29,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:02:29,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:02:29,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:02:29,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:02:29,655 INFO L87 Difference]: Start difference. First operand 5371 states and 8231 transitions. Second operand 4 states. [2020-10-23 19:02:41,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:02:41,992 INFO L93 Difference]: Finished difference Result 16036 states and 24568 transitions. [2020-10-23 19:02:41,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 19:02:41,993 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-10-23 19:02:41,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:02:42,044 INFO L225 Difference]: With dead ends: 16036 [2020-10-23 19:02:42,044 INFO L226 Difference]: Without dead ends: 10707 [2020-10-23 19:02:42,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:02:42,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10707 states. [2020-10-23 19:02:42,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10707 to 5390. [2020-10-23 19:02:42,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5390 states. [2020-10-23 19:02:42,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5390 states to 5390 states and 8259 transitions. [2020-10-23 19:02:42,395 INFO L78 Accepts]: Start accepts. Automaton has 5390 states and 8259 transitions. Word has length 327 [2020-10-23 19:02:42,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:02:42,396 INFO L481 AbstractCegarLoop]: Abstraction has 5390 states and 8259 transitions. [2020-10-23 19:02:42,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:02:42,396 INFO L276 IsEmpty]: Start isEmpty. Operand 5390 states and 8259 transitions. [2020-10-23 19:02:42,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-10-23 19:02:42,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:02:42,413 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] [2020-10-23 19:02:42,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 19:02:42,413 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:02:42,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:02:42,414 INFO L82 PathProgramCache]: Analyzing trace with hash -328565505, now seen corresponding path program 1 times [2020-10-23 19:02:42,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:02:42,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71536699] [2020-10-23 19:02:42,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:02:42,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:43,441 WARN L193 SmtUtils]: Spent 868.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-23 19:02:43,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:02:43,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:43,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:02:43,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71536699] [2020-10-23 19:02:43,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:02:43,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:02:43,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581367484] [2020-10-23 19:02:43,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:02:43,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:02:43,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:02:43,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:02:43,602 INFO L87 Difference]: Start difference. First operand 5390 states and 8259 transitions. Second operand 4 states. [2020-10-23 19:02:56,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:02:56,007 INFO L93 Difference]: Finished difference Result 16055 states and 24589 transitions. [2020-10-23 19:02:56,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 19:02:56,009 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-10-23 19:02:56,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:02:56,048 INFO L225 Difference]: With dead ends: 16055 [2020-10-23 19:02:56,049 INFO L226 Difference]: Without dead ends: 10725 [2020-10-23 19:02:56,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:02:56,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10725 states. [2020-10-23 19:02:56,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10725 to 5408. [2020-10-23 19:02:56,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5408 states. [2020-10-23 19:02:56,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5408 states to 5408 states and 8280 transitions. [2020-10-23 19:02:56,354 INFO L78 Accepts]: Start accepts. Automaton has 5408 states and 8280 transitions. Word has length 328 [2020-10-23 19:02:56,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:02:56,354 INFO L481 AbstractCegarLoop]: Abstraction has 5408 states and 8280 transitions. [2020-10-23 19:02:56,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:02:56,355 INFO L276 IsEmpty]: Start isEmpty. Operand 5408 states and 8280 transitions. [2020-10-23 19:02:56,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-10-23 19:02:56,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:02:56,369 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] [2020-10-23 19:02:56,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 19:02:56,369 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:02:56,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:02:56,370 INFO L82 PathProgramCache]: Analyzing trace with hash -108686891, now seen corresponding path program 1 times [2020-10-23 19:02:56,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:02:56,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670419508] [2020-10-23 19:02:56,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:02:56,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:57,475 WARN L193 SmtUtils]: Spent 915.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-23 19:02:57,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:02:57,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:57,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:02:57,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670419508] [2020-10-23 19:02:57,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:02:57,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:02:57,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163955073] [2020-10-23 19:02:57,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:02:57,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:02:57,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:02:57,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:02:57,646 INFO L87 Difference]: Start difference. First operand 5408 states and 8280 transitions. Second operand 4 states. [2020-10-23 19:03:08,441 WARN L193 SmtUtils]: Spent 946.00 ms on a formula simplification that was a NOOP. DAG size: 357 [2020-10-23 19:03:11,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:03:11,051 INFO L93 Difference]: Finished difference Result 15174 states and 23148 transitions. [2020-10-23 19:03:11,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:03:11,053 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 329 [2020-10-23 19:03:11,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:03:11,073 INFO L225 Difference]: With dead ends: 15174 [2020-10-23 19:03:11,074 INFO L226 Difference]: Without dead ends: 10011 [2020-10-23 19:03:11,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:03:11,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10011 states. [2020-10-23 19:03:11,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10011 to 9917. [2020-10-23 19:03:11,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9917 states. [2020-10-23 19:03:11,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9917 states to 9917 states and 15081 transitions. [2020-10-23 19:03:11,507 INFO L78 Accepts]: Start accepts. Automaton has 9917 states and 15081 transitions. Word has length 329 [2020-10-23 19:03:11,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:03:11,508 INFO L481 AbstractCegarLoop]: Abstraction has 9917 states and 15081 transitions. [2020-10-23 19:03:11,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:03:11,508 INFO L276 IsEmpty]: Start isEmpty. Operand 9917 states and 15081 transitions. [2020-10-23 19:03:11,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-10-23 19:03:11,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:03:11,530 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] [2020-10-23 19:03:11,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 19:03:11,531 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:03:11,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:03:11,531 INFO L82 PathProgramCache]: Analyzing trace with hash 43368088, now seen corresponding path program 1 times [2020-10-23 19:03:11,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:03:11,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759148691] [2020-10-23 19:03:11,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:03:11,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:03:12,818 WARN L193 SmtUtils]: Spent 890.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-23 19:03:12,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:03:12,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:03:13,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:03:13,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759148691] [2020-10-23 19:03:13,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:03:13,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 19:03:13,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373510377] [2020-10-23 19:03:13,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 19:03:13,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:03:13,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 19:03:13,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:03:13,021 INFO L87 Difference]: Start difference. First operand 9917 states and 15081 transitions. Second operand 5 states. [2020-10-23 19:03:22,468 WARN L193 SmtUtils]: Spent 932.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-23 19:03:25,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:03:25,512 INFO L93 Difference]: Finished difference Result 29088 states and 44140 transitions. [2020-10-23 19:03:25,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 19:03:25,513 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 329 [2020-10-23 19:03:25,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:03:25,548 INFO L225 Difference]: With dead ends: 29088 [2020-10-23 19:03:25,548 INFO L226 Difference]: Without dead ends: 19230 [2020-10-23 19:03:25,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 19:03:25,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19230 states. [2020-10-23 19:03:26,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19230 to 19143. [2020-10-23 19:03:26,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19143 states. [2020-10-23 19:03:26,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19143 states to 19143 states and 28872 transitions. [2020-10-23 19:03:26,413 INFO L78 Accepts]: Start accepts. Automaton has 19143 states and 28872 transitions. Word has length 329 [2020-10-23 19:03:26,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:03:26,414 INFO L481 AbstractCegarLoop]: Abstraction has 19143 states and 28872 transitions. [2020-10-23 19:03:26,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 19:03:26,414 INFO L276 IsEmpty]: Start isEmpty. Operand 19143 states and 28872 transitions. [2020-10-23 19:03:26,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-10-23 19:03:26,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:03:26,454 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] [2020-10-23 19:03:26,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 19:03:26,455 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:03:26,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:03:26,455 INFO L82 PathProgramCache]: Analyzing trace with hash -407361053, now seen corresponding path program 1 times [2020-10-23 19:03:26,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:03:26,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453861620] [2020-10-23 19:03:26,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:03:26,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:03:27,722 WARN L193 SmtUtils]: Spent 891.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-23 19:03:27,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:03:27,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:03:28,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:03:28,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453861620] [2020-10-23 19:03:28,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:03:28,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 19:03:28,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284138806] [2020-10-23 19:03:28,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 19:03:28,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:03:28,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 19:03:28,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:03:28,076 INFO L87 Difference]: Start difference. First operand 19143 states and 28872 transitions. Second operand 5 states. [2020-10-23 19:03:38,255 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification that was a NOOP. DAG size: 358 [2020-10-23 19:03:41,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:03:41,549 INFO L93 Difference]: Finished difference Result 56364 states and 84845 transitions. [2020-10-23 19:03:41,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 19:03:41,550 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 331 [2020-10-23 19:03:41,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:03:41,606 INFO L225 Difference]: With dead ends: 56364 [2020-10-23 19:03:41,606 INFO L226 Difference]: Without dead ends: 37342 [2020-10-23 19:03:41,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 19:03:41,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37342 states. [2020-10-23 19:03:43,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37342 to 37278. [2020-10-23 19:03:43,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37278 states. [2020-10-23 19:03:43,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37278 states to 37278 states and 55762 transitions. [2020-10-23 19:03:43,249 INFO L78 Accepts]: Start accepts. Automaton has 37278 states and 55762 transitions. Word has length 331 [2020-10-23 19:03:43,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:03:43,249 INFO L481 AbstractCegarLoop]: Abstraction has 37278 states and 55762 transitions. [2020-10-23 19:03:43,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 19:03:43,249 INFO L276 IsEmpty]: Start isEmpty. Operand 37278 states and 55762 transitions. [2020-10-23 19:03:43,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-10-23 19:03:43,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:03:43,309 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] [2020-10-23 19:03:43,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 19:03:43,310 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:03:43,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:03:43,310 INFO L82 PathProgramCache]: Analyzing trace with hash -218540222, now seen corresponding path program 1 times [2020-10-23 19:03:43,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:03:43,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965645270] [2020-10-23 19:03:43,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:03:43,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:03:44,697 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification that was a NOOP. DAG size: 352 [2020-10-23 19:03:44,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:03:44,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:03:44,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:03:44,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965645270] [2020-10-23 19:03:44,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:03:44,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 19:03:44,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193173429] [2020-10-23 19:03:44,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 19:03:44,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:03:44,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 19:03:44,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:03:44,910 INFO L87 Difference]: Start difference. First operand 37278 states and 55762 transitions. Second operand 5 states. [2020-10-23 19:03:56,388 WARN L193 SmtUtils]: Spent 968.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-23 19:04:00,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:04:00,163 INFO L93 Difference]: Finished difference Result 110056 states and 164347 transitions. [2020-10-23 19:04:00,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 19:04:00,164 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 331 [2020-10-23 19:04:00,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:04:00,266 INFO L225 Difference]: With dead ends: 110056 [2020-10-23 19:04:00,266 INFO L226 Difference]: Without dead ends: 73012 [2020-10-23 19:04:00,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 19:04:00,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73012 states. [2020-10-23 19:04:03,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73012 to 72880. [2020-10-23 19:04:03,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72880 states. [2020-10-23 19:04:04,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72880 states to 72880 states and 108228 transitions. [2020-10-23 19:04:04,080 INFO L78 Accepts]: Start accepts. Automaton has 72880 states and 108228 transitions. Word has length 331 [2020-10-23 19:04:04,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:04:04,081 INFO L481 AbstractCegarLoop]: Abstraction has 72880 states and 108228 transitions. [2020-10-23 19:04:04,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 19:04:04,081 INFO L276 IsEmpty]: Start isEmpty. Operand 72880 states and 108228 transitions. [2020-10-23 19:04:04,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-10-23 19:04:04,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:04:04,186 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] [2020-10-23 19:04:04,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-23 19:04:04,186 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:04:04,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:04:04,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1270469687, now seen corresponding path program 1 times [2020-10-23 19:04:04,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:04:04,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25751946] [2020-10-23 19:04:04,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:04:04,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:04:05,578 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 352 [2020-10-23 19:04:05,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:04:05,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:04:05,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:04:05,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25751946] [2020-10-23 19:04:05,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:04:05,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:04:05,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756541671] [2020-10-23 19:04:05,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:04:05,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:04:05,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:04:05,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:04:05,750 INFO L87 Difference]: Start difference. First operand 72880 states and 108228 transitions. Second operand 4 states. [2020-10-23 19:04:21,169 WARN L193 SmtUtils]: Spent 982.00 ms on a formula simplification that was a NOOP. DAG size: 357 [2020-10-23 19:04:25,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:04:25,667 INFO L93 Difference]: Finished difference Result 214496 states and 317756 transitions. [2020-10-23 19:04:25,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:04:25,668 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 333 [2020-10-23 19:04:25,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:04:25,890 INFO L225 Difference]: With dead ends: 214496 [2020-10-23 19:04:25,891 INFO L226 Difference]: Without dead ends: 143000 [2020-10-23 19:04:26,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:04:26,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143000 states. [2020-10-23 19:04:32,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143000 to 142868. [2020-10-23 19:04:32,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142868 states. [2020-10-23 19:04:33,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142868 states to 142868 states and 210686 transitions. [2020-10-23 19:04:33,268 INFO L78 Accepts]: Start accepts. Automaton has 142868 states and 210686 transitions. Word has length 333 [2020-10-23 19:04:33,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:04:33,269 INFO L481 AbstractCegarLoop]: Abstraction has 142868 states and 210686 transitions. [2020-10-23 19:04:33,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:04:33,269 INFO L276 IsEmpty]: Start isEmpty. Operand 142868 states and 210686 transitions. [2020-10-23 19:04:33,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-10-23 19:04:33,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:04:33,423 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] [2020-10-23 19:04:33,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-23 19:04:33,424 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:04:33,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:04:33,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1669966226, now seen corresponding path program 1 times [2020-10-23 19:04:33,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:04:33,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590198439] [2020-10-23 19:04:33,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:04:33,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:04:34,793 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification that was a NOOP. DAG size: 352 [2020-10-23 19:04:34,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:04:34,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:04:34,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:04:34,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590198439] [2020-10-23 19:04:34,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:04:34,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:04:34,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330570902] [2020-10-23 19:04:34,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:04:34,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:04:34,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:04:34,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:04:34,965 INFO L87 Difference]: Start difference. First operand 142868 states and 210686 transitions. Second operand 4 states. [2020-10-23 19:05:00,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:05:00,730 INFO L93 Difference]: Finished difference Result 427470 states and 630225 transitions. [2020-10-23 19:05:00,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 19:05:00,731 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 333 [2020-10-23 19:05:00,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:05:01,133 INFO L225 Difference]: With dead ends: 427470 [2020-10-23 19:05:01,133 INFO L226 Difference]: Without dead ends: 285268 [2020-10-23 19:05:01,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:05:01,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285268 states. [2020-10-23 19:05:09,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285268 to 143078. [2020-10-23 19:05:09,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143078 states. [2020-10-23 19:05:09,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143078 states to 143078 states and 210998 transitions. [2020-10-23 19:05:09,938 INFO L78 Accepts]: Start accepts. Automaton has 143078 states and 210998 transitions. Word has length 333 [2020-10-23 19:05:09,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:05:09,938 INFO L481 AbstractCegarLoop]: Abstraction has 143078 states and 210998 transitions. [2020-10-23 19:05:09,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:05:09,938 INFO L276 IsEmpty]: Start isEmpty. Operand 143078 states and 210998 transitions. [2020-10-23 19:05:10,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-10-23 19:05:10,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:05:10,064 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:05:10,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-23 19:05:10,065 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:05:10,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:05:10,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1899161634, now seen corresponding path program 1 times [2020-10-23 19:05:10,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:05:10,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349587173] [2020-10-23 19:05:10,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:05:10,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:05:11,395 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification that was a NOOP. DAG size: 352 [2020-10-23 19:05:11,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:05:11,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:05:11,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:05:11,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349587173] [2020-10-23 19:05:11,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:05:11,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:05:11,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517517285] [2020-10-23 19:05:11,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:05:11,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:05:11,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:05:11,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:05:11,585 INFO L87 Difference]: Start difference. First operand 143078 states and 210998 transitions. Second operand 4 states. [2020-10-23 19:05:38,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:05:38,699 INFO L93 Difference]: Finished difference Result 427658 states and 630431 transitions. [2020-10-23 19:05:38,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 19:05:38,700 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2020-10-23 19:05:38,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:05:39,069 INFO L225 Difference]: With dead ends: 427658 [2020-10-23 19:05:39,069 INFO L226 Difference]: Without dead ends: 285446 [2020-10-23 19:05:39,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:05:39,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285446 states. [2020-10-23 19:05:48,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285446 to 143308. [2020-10-23 19:05:48,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143308 states. [2020-10-23 19:05:48,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143308 states to 143308 states and 211262 transitions. [2020-10-23 19:05:48,709 INFO L78 Accepts]: Start accepts. Automaton has 143308 states and 211262 transitions. Word has length 334 [2020-10-23 19:05:48,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:05:48,710 INFO L481 AbstractCegarLoop]: Abstraction has 143308 states and 211262 transitions. [2020-10-23 19:05:48,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:05:48,710 INFO L276 IsEmpty]: Start isEmpty. Operand 143308 states and 211262 transitions. [2020-10-23 19:05:48,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-10-23 19:05:48,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:05:48,832 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:05:48,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-23 19:05:48,832 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:05:48,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:05:48,832 INFO L82 PathProgramCache]: Analyzing trace with hash -682733601, now seen corresponding path program 1 times [2020-10-23 19:05:48,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:05:48,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184284296] [2020-10-23 19:05:48,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:05:48,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:05:50,415 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification that was a NOOP. DAG size: 352 [2020-10-23 19:05:50,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:05:50,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:05:50,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:05:50,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184284296] [2020-10-23 19:05:50,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:05:50,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 19:05:50,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902213885] [2020-10-23 19:05:50,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 19:05:50,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:05:50,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 19:05:50,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:05:50,667 INFO L87 Difference]: Start difference. First operand 143308 states and 211262 transitions. Second operand 5 states. [2020-10-23 19:06:10,304 WARN L193 SmtUtils]: Spent 975.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-23 19:06:17,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:06:17,956 INFO L93 Difference]: Finished difference Result 421773 states and 620355 transitions. [2020-10-23 19:06:17,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 19:06:17,957 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 335 [2020-10-23 19:06:17,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:06:18,553 INFO L225 Difference]: With dead ends: 421773 [2020-10-23 19:06:18,554 INFO L226 Difference]: Without dead ends: 279050 [2020-10-23 19:06:18,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 19:06:18,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279050 states. [2020-10-23 19:06:36,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279050 to 278948. [2020-10-23 19:06:36,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278948 states. [2020-10-23 19:06:37,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278948 states to 278948 states and 407484 transitions. [2020-10-23 19:06:37,767 INFO L78 Accepts]: Start accepts. Automaton has 278948 states and 407484 transitions. Word has length 335 [2020-10-23 19:06:37,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:06:37,768 INFO L481 AbstractCegarLoop]: Abstraction has 278948 states and 407484 transitions. [2020-10-23 19:06:37,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 19:06:37,768 INFO L276 IsEmpty]: Start isEmpty. Operand 278948 states and 407484 transitions. [2020-10-23 19:06:38,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-10-23 19:06:38,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:06:38,136 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:06:38,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-23 19:06:38,136 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:06:38,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:06:38,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1044997211, now seen corresponding path program 1 times [2020-10-23 19:06:38,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:06:38,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065239870] [2020-10-23 19:06:38,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:06:38,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:06:39,934 WARN L193 SmtUtils]: Spent 940.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-23 19:06:39,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:06:39,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:06:40,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:06:40,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065239870] [2020-10-23 19:06:40,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:06:40,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 19:06:40,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156388720] [2020-10-23 19:06:40,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 19:06:40,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:06:40,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 19:06:40,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:06:40,179 INFO L87 Difference]: Start difference. First operand 278948 states and 407484 transitions. Second operand 5 states. [2020-10-23 19:07:04,243 WARN L193 SmtUtils]: Spent 997.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-23 19:07:12,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:07:12,962 INFO L93 Difference]: Finished difference Result 578117 states and 844594 transitions. [2020-10-23 19:07:12,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 19:07:12,963 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 337 [2020-10-23 19:07:12,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:07:13,642 INFO L225 Difference]: With dead ends: 578117 [2020-10-23 19:07:13,642 INFO L226 Difference]: Without dead ends: 300791 [2020-10-23 19:07:13,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 19:07:14,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300791 states. [2020-10-23 19:07:31,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300791 to 279183. [2020-10-23 19:07:31,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279183 states. [2020-10-23 19:07:32,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279183 states to 279183 states and 407670 transitions. [2020-10-23 19:07:32,586 INFO L78 Accepts]: Start accepts. Automaton has 279183 states and 407670 transitions. Word has length 337 [2020-10-23 19:07:32,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:07:32,587 INFO L481 AbstractCegarLoop]: Abstraction has 279183 states and 407670 transitions. [2020-10-23 19:07:32,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 19:07:32,587 INFO L276 IsEmpty]: Start isEmpty. Operand 279183 states and 407670 transitions. [2020-10-23 19:07:32,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-10-23 19:07:32,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:07:32,851 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:07:32,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-23 19:07:32,852 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:07:32,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:07:32,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1776252500, now seen corresponding path program 1 times [2020-10-23 19:07:32,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:07:32,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338716383] [2020-10-23 19:07:32,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:07:32,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:07:34,419 WARN L193 SmtUtils]: Spent 1.43 s on a formula simplification that was a NOOP. DAG size: 352 [2020-10-23 19:07:34,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:07:34,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:07:34,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:07:34,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338716383] [2020-10-23 19:07:34,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:07:34,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:07:34,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550330035] [2020-10-23 19:07:34,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:07:34,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:07:34,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:07:34,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:07:34,562 INFO L87 Difference]: Start difference. First operand 279183 states and 407670 transitions. Second operand 4 states. [2020-10-23 19:08:24,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:08:24,601 INFO L93 Difference]: Finished difference Result 831195 states and 1213022 transitions. [2020-10-23 19:08:24,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 19:08:24,603 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 339 [2020-10-23 19:08:24,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:08:26,171 INFO L225 Difference]: With dead ends: 831195 [2020-10-23 19:08:26,182 INFO L226 Difference]: Without dead ends: 554494 [2020-10-23 19:08:26,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:08:26,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554494 states. [2020-10-23 19:08:49,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554494 to 279656. [2020-10-23 19:08:49,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279656 states.