/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 19:05:00,543 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 19:05:00,547 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 19:05:00,607 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 19:05:00,608 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 19:05:00,611 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 19:05:00,615 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 19:05:00,622 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 19:05:00,626 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 19:05:00,634 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 19:05:00,635 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 19:05:00,637 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 19:05:00,637 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 19:05:00,640 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 19:05:00,642 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 19:05:00,644 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 19:05:00,645 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 19:05:00,649 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 19:05:00,668 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 19:05:00,675 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 19:05:00,678 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 19:05:00,679 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 19:05:00,681 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 19:05:00,683 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 19:05:00,689 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 19:05:00,707 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 19:05:00,708 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 19:05:00,709 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 19:05:00,710 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 19:05:00,739 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 19:05:00,739 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 19:05:00,741 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 19:05:00,741 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 19:05:00,741 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 19:05:00,742 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 19:05:00,742 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 19:05:00,742 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 19:05:00,742 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 19:05:00,743 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 19:05:00,743 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 19:05:00,743 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 19:05:00,743 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 19:05:00,743 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 19:05:00,744 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 19:05:00,744 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 19:05:00,744 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 19:05:00,744 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 19:05:00,745 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 19:05:00,745 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 19:05:00,745 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 19:05:00,745 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 19:05:00,746 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 19:05:00,746 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 19:05:00,746 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 19:05:00,746 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 19:05:00,746 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 19:05:00,747 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 19:05:00,747 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 19:05:00,747 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 19:05:01,116 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 19:05:01,142 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 19:05:01,146 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 19:05:01,147 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 19:05:01,148 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 19:05:01,149 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-23 19:05:01,236 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d33ae6d5/4b8a7c817ad34559ad33f9bd95385678/FLAG62dedce24 [2020-10-23 19:05:02,211 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 19:05:02,212 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-23 19:05:02,243 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d33ae6d5/4b8a7c817ad34559ad33f9bd95385678/FLAG62dedce24 [2020-10-23 19:05:02,286 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d33ae6d5/4b8a7c817ad34559ad33f9bd95385678 [2020-10-23 19:05:02,289 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 19:05:02,295 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 19:05:02,296 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 19:05:02,297 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 19:05:02,301 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 19:05:02,302 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 07:05:02" (1/1) ... [2020-10-23 19:05:02,305 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@215251c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:05:02, skipping insertion in model container [2020-10-23 19:05:02,305 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 07:05:02" (1/1) ... [2020-10-23 19:05:02,315 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 19:05:02,486 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 19:05:04,256 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 19:05:04,273 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 19:05:05,066 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 19:05:05,092 INFO L208 MainTranslator]: Completed translation [2020-10-23 19:05:05,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:05:05 WrapperNode [2020-10-23 19:05:05,093 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 19:05:05,095 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 19:05:05,095 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 19:05:05,095 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 19:05:05,110 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:05:05" (1/1) ... [2020-10-23 19:05:05,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:05:05" (1/1) ... [2020-10-23 19:05:05,146 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:05:05" (1/1) ... [2020-10-23 19:05:05,146 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:05:05" (1/1) ... [2020-10-23 19:05:05,234 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:05:05" (1/1) ... [2020-10-23 19:05:05,272 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:05:05" (1/1) ... [2020-10-23 19:05:05,291 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:05:05" (1/1) ... [2020-10-23 19:05:05,318 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 19:05:05,320 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 19:05:05,321 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 19:05:05,321 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 19:05:05,322 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:05:05" (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 19:05:05,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 19:05:05,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 19:05:05,413 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 19:05:05,414 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 19:05:05,414 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 19:05:05,415 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 19:05:05,415 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 19:05:05,415 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 19:05:05,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 19:05:05,416 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-23 19:05:05,417 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-23 19:05:05,417 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-23 19:05:05,417 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-23 19:05:05,418 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 19:05:05,418 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-23 19:05:05,419 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-23 19:05:05,420 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-23 19:05:05,420 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-23 19:05:05,420 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-23 19:05:05,420 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-23 19:05:05,420 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-23 19:05:05,421 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-23 19:05:05,421 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 19:05:05,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 19:05:05,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 19:05:05,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 19:05:05,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 19:05:05,422 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 19:05:05,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 19:05:09,100 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 19:05:09,100 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 19:05:09,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 07:05:09 BoogieIcfgContainer [2020-10-23 19:05:09,104 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 19:05:09,106 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 19:05:09,106 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 19:05:09,109 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 19:05:09,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 07:05:02" (1/3) ... [2020-10-23 19:05:09,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3356c9aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 07:05:09, skipping insertion in model container [2020-10-23 19:05:09,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:05:05" (2/3) ... [2020-10-23 19:05:09,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3356c9aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 07:05:09, skipping insertion in model container [2020-10-23 19:05:09,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 07:05:09" (3/3) ... [2020-10-23 19:05:09,113 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-23 19:05:09,125 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 19:05:09,131 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 19:05:09,144 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 19:05:09,180 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 19:05:09,180 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 19:05:09,180 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 19:05:09,181 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 19:05:09,181 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 19:05:09,181 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 19:05:09,181 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 19:05:09,181 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 19:05:09,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states. [2020-10-23 19:05:09,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-10-23 19:05:09,264 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:05:09,266 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 19:05:09,266 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:05:09,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:05:09,282 INFO L82 PathProgramCache]: Analyzing trace with hash -248347841, now seen corresponding path program 1 times [2020-10-23 19:05:09,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:05:09,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595889344] [2020-10-23 19:05:09,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:05:09,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:05:11,186 WARN L193 SmtUtils]: Spent 721.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-23 19:05:11,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:05:11,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:05:11,448 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 19:05:11,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595889344] [2020-10-23 19:05:11,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:05:11,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:05:11,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065335055] [2020-10-23 19:05:11,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:05:11,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:05:11,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:05:11,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:05:11,483 INFO L87 Difference]: Start difference. First operand 1031 states. Second operand 4 states. [2020-10-23 19:05:12,545 WARN L193 SmtUtils]: Spent 944.00 ms on a formula simplification that was a NOOP. DAG size: 353 [2020-10-23 19:05:21,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:05:21,809 INFO L93 Difference]: Finished difference Result 1809 states and 3227 transitions. [2020-10-23 19:05:21,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:05:21,812 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-10-23 19:05:21,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:05:21,855 INFO L225 Difference]: With dead ends: 1809 [2020-10-23 19:05:21,855 INFO L226 Difference]: Without dead ends: 1520 [2020-10-23 19:05:21,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:05:21,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2020-10-23 19:05:22,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 1517. [2020-10-23 19:05:22,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1517 states. [2020-10-23 19:05:22,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1517 states to 1517 states and 2337 transitions. [2020-10-23 19:05:22,064 INFO L78 Accepts]: Start accepts. Automaton has 1517 states and 2337 transitions. Word has length 328 [2020-10-23 19:05:22,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:05:22,066 INFO L481 AbstractCegarLoop]: Abstraction has 1517 states and 2337 transitions. [2020-10-23 19:05:22,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:05:22,067 INFO L276 IsEmpty]: Start isEmpty. Operand 1517 states and 2337 transitions. [2020-10-23 19:05:22,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-10-23 19:05:22,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:05:22,076 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 19:05:22,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 19:05:22,077 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:05:22,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:05:22,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1869741437, now seen corresponding path program 1 times [2020-10-23 19:05:22,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:05:22,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659052172] [2020-10-23 19:05:22,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:05:22,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:05:23,499 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification that was a NOOP. DAG size: 352 [2020-10-23 19:05:23,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:05:23,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:05:23,685 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 19:05:23,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659052172] [2020-10-23 19:05:23,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:05:23,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:05:23,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606670623] [2020-10-23 19:05:23,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:05:23,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:05:23,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:05:23,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:05:23,689 INFO L87 Difference]: Start difference. First operand 1517 states and 2337 transitions. Second operand 4 states. [2020-10-23 19:05:24,639 WARN L193 SmtUtils]: Spent 883.00 ms on a formula simplification that was a NOOP. DAG size: 353 [2020-10-23 19:05:32,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:05:32,393 INFO L93 Difference]: Finished difference Result 2970 states and 4624 transitions. [2020-10-23 19:05:32,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:05:32,402 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-10-23 19:05:32,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:05:32,423 INFO L225 Difference]: With dead ends: 2970 [2020-10-23 19:05:32,423 INFO L226 Difference]: Without dead ends: 2602 [2020-10-23 19:05:32,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:05:32,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2602 states. [2020-10-23 19:05:32,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2602 to 2599. [2020-10-23 19:05:32,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2599 states. [2020-10-23 19:05:32,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2599 states to 2599 states and 4020 transitions. [2020-10-23 19:05:32,538 INFO L78 Accepts]: Start accepts. Automaton has 2599 states and 4020 transitions. Word has length 328 [2020-10-23 19:05:32,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:05:32,540 INFO L481 AbstractCegarLoop]: Abstraction has 2599 states and 4020 transitions. [2020-10-23 19:05:32,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:05:32,540 INFO L276 IsEmpty]: Start isEmpty. Operand 2599 states and 4020 transitions. [2020-10-23 19:05:32,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-10-23 19:05:32,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:05:32,555 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 19:05:32,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 19:05:32,557 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:05:32,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:05:32,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1880238502, now seen corresponding path program 1 times [2020-10-23 19:05:32,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:05:32,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650331297] [2020-10-23 19:05:32,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:05:33,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:05:34,191 WARN L193 SmtUtils]: Spent 872.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-23 19:05:34,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:05:34,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:05:34,376 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 19:05:34,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650331297] [2020-10-23 19:05:34,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:05:34,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 19:05:34,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910552825] [2020-10-23 19:05:34,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 19:05:34,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:05:34,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 19:05:34,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:05:34,379 INFO L87 Difference]: Start difference. First operand 2599 states and 4020 transitions. Second operand 5 states. [2020-10-23 19:05:43,815 WARN L193 SmtUtils]: Spent 895.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-23 19:05:46,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:05:46,434 INFO L93 Difference]: Finished difference Result 7687 states and 11879 transitions. [2020-10-23 19:05:46,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 19:05:46,435 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 328 [2020-10-23 19:05:46,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:05:46,462 INFO L225 Difference]: With dead ends: 7687 [2020-10-23 19:05:46,462 INFO L226 Difference]: Without dead ends: 5103 [2020-10-23 19:05:46,468 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 19:05:46,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5103 states. [2020-10-23 19:05:46,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5103 to 4906. [2020-10-23 19:05:46,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4906 states. [2020-10-23 19:05:46,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4906 states to 4906 states and 7572 transitions. [2020-10-23 19:05:46,712 INFO L78 Accepts]: Start accepts. Automaton has 4906 states and 7572 transitions. Word has length 328 [2020-10-23 19:05:46,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:05:46,712 INFO L481 AbstractCegarLoop]: Abstraction has 4906 states and 7572 transitions. [2020-10-23 19:05:46,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 19:05:46,712 INFO L276 IsEmpty]: Start isEmpty. Operand 4906 states and 7572 transitions. [2020-10-23 19:05:46,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-10-23 19:05:46,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:05:46,727 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:05:46,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 19:05:46,727 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:05:46,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:05:46,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1042744992, now seen corresponding path program 1 times [2020-10-23 19:05:46,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:05:46,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063411418] [2020-10-23 19:05:46,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:05:46,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:05:47,774 WARN L193 SmtUtils]: Spent 854.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-23 19:05:47,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:05:47,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:05:48,022 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 19:05:48,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063411418] [2020-10-23 19:05:48,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:05:48,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:05:48,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564917401] [2020-10-23 19:05:48,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:05:48,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:05:48,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:05:48,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:05:48,025 INFO L87 Difference]: Start difference. First operand 4906 states and 7572 transitions. Second operand 4 states. [2020-10-23 19:05:58,987 WARN L193 SmtUtils]: Spent 984.00 ms on a formula simplification that was a NOOP. DAG size: 357 [2020-10-23 19:06:01,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:06:01,745 INFO L93 Difference]: Finished difference Result 14411 states and 22192 transitions. [2020-10-23 19:06:01,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:06:01,745 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-10-23 19:06:01,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:06:01,805 INFO L225 Difference]: With dead ends: 14411 [2020-10-23 19:06:01,805 INFO L226 Difference]: Without dead ends: 9634 [2020-10-23 19:06:01,815 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 19:06:01,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9634 states. [2020-10-23 19:06:02,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9634 to 9437. [2020-10-23 19:06:02,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9437 states. [2020-10-23 19:06:02,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9437 states to 9437 states and 14508 transitions. [2020-10-23 19:06:02,175 INFO L78 Accepts]: Start accepts. Automaton has 9437 states and 14508 transitions. Word has length 330 [2020-10-23 19:06:02,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:06:02,176 INFO L481 AbstractCegarLoop]: Abstraction has 9437 states and 14508 transitions. [2020-10-23 19:06:02,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:06:02,176 INFO L276 IsEmpty]: Start isEmpty. Operand 9437 states and 14508 transitions. [2020-10-23 19:06:02,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-10-23 19:06:02,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:06:02,204 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:06:02,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 19:06:02,204 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:06:02,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:06:02,205 INFO L82 PathProgramCache]: Analyzing trace with hash -198968731, now seen corresponding path program 1 times [2020-10-23 19:06:02,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:06:02,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141803245] [2020-10-23 19:06:02,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:06:02,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:06:03,266 WARN L193 SmtUtils]: Spent 896.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-23 19:06:03,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:06:03,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:06:03,373 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 19:06:03,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141803245] [2020-10-23 19:06:03,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:06:03,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:06:03,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269504005] [2020-10-23 19:06:03,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:06:03,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:06:03,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:06:03,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:06:03,376 INFO L87 Difference]: Start difference. First operand 9437 states and 14508 transitions. Second operand 4 states. [2020-10-23 19:06:16,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:06:16,144 INFO L93 Difference]: Finished difference Result 28234 states and 43399 transitions. [2020-10-23 19:06:16,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 19:06:16,145 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-10-23 19:06:16,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:06:16,208 INFO L225 Difference]: With dead ends: 28234 [2020-10-23 19:06:16,208 INFO L226 Difference]: Without dead ends: 18839 [2020-10-23 19:06:16,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:06:16,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18839 states. [2020-10-23 19:06:16,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18839 to 9456. [2020-10-23 19:06:16,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9456 states. [2020-10-23 19:06:16,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9456 states to 9456 states and 14536 transitions. [2020-10-23 19:06:16,665 INFO L78 Accepts]: Start accepts. Automaton has 9456 states and 14536 transitions. Word has length 330 [2020-10-23 19:06:16,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:06:16,666 INFO L481 AbstractCegarLoop]: Abstraction has 9456 states and 14536 transitions. [2020-10-23 19:06:16,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:06:16,666 INFO L276 IsEmpty]: Start isEmpty. Operand 9456 states and 14536 transitions. [2020-10-23 19:06:16,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-10-23 19:06:16,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:06:16,689 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 19:06:16,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 19:06:16,694 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:06:16,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:06:16,695 INFO L82 PathProgramCache]: Analyzing trace with hash -173910725, now seen corresponding path program 1 times [2020-10-23 19:06:16,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:06:16,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619757287] [2020-10-23 19:06:16,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:06:16,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:06:17,758 WARN L193 SmtUtils]: Spent 904.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-23 19:06:17,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:06:17,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:06:17,868 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 19:06:17,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619757287] [2020-10-23 19:06:17,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:06:17,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:06:17,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118406806] [2020-10-23 19:06:17,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:06:17,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:06:17,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:06:17,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:06:17,870 INFO L87 Difference]: Start difference. First operand 9456 states and 14536 transitions. Second operand 4 states. [2020-10-23 19:06:31,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:06:31,551 INFO L93 Difference]: Finished difference Result 28253 states and 43420 transitions. [2020-10-23 19:06:31,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 19:06:31,553 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 331 [2020-10-23 19:06:31,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:06:31,598 INFO L225 Difference]: With dead ends: 28253 [2020-10-23 19:06:31,598 INFO L226 Difference]: Without dead ends: 18857 [2020-10-23 19:06:31,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:06:31,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18857 states. [2020-10-23 19:06:32,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18857 to 9474. [2020-10-23 19:06:32,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9474 states. [2020-10-23 19:06:32,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9474 states to 9474 states and 14557 transitions. [2020-10-23 19:06:32,194 INFO L78 Accepts]: Start accepts. Automaton has 9474 states and 14557 transitions. Word has length 331 [2020-10-23 19:06:32,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:06:32,195 INFO L481 AbstractCegarLoop]: Abstraction has 9474 states and 14557 transitions. [2020-10-23 19:06:32,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:06:32,195 INFO L276 IsEmpty]: Start isEmpty. Operand 9474 states and 14557 transitions. [2020-10-23 19:06:32,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-10-23 19:06:32,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:06:32,218 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:06:32,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 19:06:32,219 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:06:32,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:06:32,219 INFO L82 PathProgramCache]: Analyzing trace with hash -2078894437, now seen corresponding path program 1 times [2020-10-23 19:06:32,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:06:32,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164561904] [2020-10-23 19:06:32,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:06:32,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:06:33,332 WARN L193 SmtUtils]: Spent 908.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-23 19:06:33,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:06:33,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:06:33,544 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 19:06:33,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164561904] [2020-10-23 19:06:33,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:06:33,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:06:33,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075459779] [2020-10-23 19:06:33,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:06:33,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:06:33,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:06:33,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:06:33,547 INFO L87 Difference]: Start difference. First operand 9474 states and 14557 transitions. Second operand 4 states. [2020-10-23 19:06:45,077 WARN L193 SmtUtils]: Spent 941.00 ms on a formula simplification that was a NOOP. DAG size: 357 [2020-10-23 19:06:48,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:06:48,071 INFO L93 Difference]: Finished difference Result 27731 states and 42504 transitions. [2020-10-23 19:06:48,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:06:48,072 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-10-23 19:06:48,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:06:48,110 INFO L225 Difference]: With dead ends: 27731 [2020-10-23 19:06:48,110 INFO L226 Difference]: Without dead ends: 18502 [2020-10-23 19:06:48,133 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 19:06:48,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18502 states. [2020-10-23 19:06:48,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18502 to 18305. [2020-10-23 19:06:48,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18305 states. [2020-10-23 19:06:48,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18305 states to 18305 states and 27961 transitions. [2020-10-23 19:06:48,844 INFO L78 Accepts]: Start accepts. Automaton has 18305 states and 27961 transitions. Word has length 332 [2020-10-23 19:06:48,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:06:48,844 INFO L481 AbstractCegarLoop]: Abstraction has 18305 states and 27961 transitions. [2020-10-23 19:06:48,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:06:48,844 INFO L276 IsEmpty]: Start isEmpty. Operand 18305 states and 27961 transitions. [2020-10-23 19:06:48,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-10-23 19:06:48,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:06:48,885 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:06:48,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 19:06:48,886 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:06:48,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:06:48,886 INFO L82 PathProgramCache]: Analyzing trace with hash 895454968, now seen corresponding path program 1 times [2020-10-23 19:06:48,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:06:48,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900194818] [2020-10-23 19:06:48,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:06:49,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:06:50,272 WARN L193 SmtUtils]: Spent 868.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-23 19:06:50,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:06:50,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:06:50,496 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 19:06:50,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900194818] [2020-10-23 19:06:50,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:06:50,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 19:06:50,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430458524] [2020-10-23 19:06:50,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 19:06:50,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:06:50,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 19:06:50,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:06:50,508 INFO L87 Difference]: Start difference. First operand 18305 states and 27961 transitions. Second operand 5 states. [2020-10-23 19:07:00,529 WARN L193 SmtUtils]: Spent 937.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-23 19:07:03,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:07:03,775 INFO L93 Difference]: Finished difference Result 53877 states and 82132 transitions. [2020-10-23 19:07:03,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 19:07:03,776 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 332 [2020-10-23 19:07:03,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:07:03,836 INFO L225 Difference]: With dead ends: 53877 [2020-10-23 19:07:03,836 INFO L226 Difference]: Without dead ends: 35631 [2020-10-23 19:07:03,879 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 19:07:03,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35631 states. [2020-10-23 19:07:05,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35631 to 35450. [2020-10-23 19:07:05,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35450 states. [2020-10-23 19:07:05,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35450 states to 35450 states and 53698 transitions. [2020-10-23 19:07:05,498 INFO L78 Accepts]: Start accepts. Automaton has 35450 states and 53698 transitions. Word has length 332 [2020-10-23 19:07:05,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:07:05,498 INFO L481 AbstractCegarLoop]: Abstraction has 35450 states and 53698 transitions. [2020-10-23 19:07:05,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 19:07:05,499 INFO L276 IsEmpty]: Start isEmpty. Operand 35450 states and 53698 transitions. [2020-10-23 19:07:05,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-10-23 19:07:05,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:07:05,556 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 19:07:05,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 19:07:05,557 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:07:05,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:07:05,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1044041058, now seen corresponding path program 1 times [2020-10-23 19:07:05,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:07:05,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797546183] [2020-10-23 19:07:05,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:07:05,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:07:06,771 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification that was a NOOP. DAG size: 352 [2020-10-23 19:07:06,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:07:06,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:07:06,933 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 19:07:06,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797546183] [2020-10-23 19:07:06,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:07:06,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:07:06,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244323435] [2020-10-23 19:07:06,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:07:06,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:07:06,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:07:06,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:07:06,936 INFO L87 Difference]: Start difference. First operand 35450 states and 53698 transitions. Second operand 4 states. [2020-10-23 19:07:20,351 WARN L193 SmtUtils]: Spent 975.00 ms on a formula simplification that was a NOOP. DAG size: 357 [2020-10-23 19:07:24,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:07:24,161 INFO L93 Difference]: Finished difference Result 104278 states and 157581 transitions. [2020-10-23 19:07:24,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:07:24,162 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2020-10-23 19:07:24,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:07:24,256 INFO L225 Difference]: With dead ends: 104278 [2020-10-23 19:07:24,256 INFO L226 Difference]: Without dead ends: 69349 [2020-10-23 19:07:24,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:07:24,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69349 states. [2020-10-23 19:07:27,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69349 to 69184. [2020-10-23 19:07:27,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69184 states. [2020-10-23 19:07:27,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69184 states to 69184 states and 103955 transitions. [2020-10-23 19:07:27,514 INFO L78 Accepts]: Start accepts. Automaton has 69184 states and 103955 transitions. Word has length 334 [2020-10-23 19:07:27,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:07:27,515 INFO L481 AbstractCegarLoop]: Abstraction has 69184 states and 103955 transitions. [2020-10-23 19:07:27,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:07:27,515 INFO L276 IsEmpty]: Start isEmpty. Operand 69184 states and 103955 transitions. [2020-10-23 19:07:27,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-10-23 19:07:27,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:07:27,579 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:07:27,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-23 19:07:27,579 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:07:27,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:07:27,580 INFO L82 PathProgramCache]: Analyzing trace with hash -625304005, now seen corresponding path program 1 times [2020-10-23 19:07:27,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:07:27,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039474747] [2020-10-23 19:07:27,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:07:28,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:07:29,392 WARN L193 SmtUtils]: Spent 975.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-23 19:07:29,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:07:29,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:07:29,564 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 19:07:29,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039474747] [2020-10-23 19:07:29,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:07:29,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 19:07:29,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333660661] [2020-10-23 19:07:29,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 19:07:29,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:07:29,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 19:07:29,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:07:29,567 INFO L87 Difference]: Start difference. First operand 69184 states and 103955 transitions. Second operand 5 states. [2020-10-23 19:07:43,687 WARN L193 SmtUtils]: Spent 976.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-23 19:07:48,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:07:48,674 INFO L93 Difference]: Finished difference Result 204189 states and 306175 transitions. [2020-10-23 19:07:48,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 19:07:48,675 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 334 [2020-10-23 19:07:48,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:07:48,869 INFO L225 Difference]: With dead ends: 204189 [2020-10-23 19:07:48,870 INFO L226 Difference]: Without dead ends: 135160 [2020-10-23 19:07:48,937 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 19:07:49,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135160 states. [2020-10-23 19:07:54,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135160 to 135059. [2020-10-23 19:07:54,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135059 states. [2020-10-23 19:07:55,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135059 states to 135059 states and 201215 transitions. [2020-10-23 19:07:55,240 INFO L78 Accepts]: Start accepts. Automaton has 135059 states and 201215 transitions. Word has length 334 [2020-10-23 19:07:55,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:07:55,240 INFO L481 AbstractCegarLoop]: Abstraction has 135059 states and 201215 transitions. [2020-10-23 19:07:55,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 19:07:55,240 INFO L276 IsEmpty]: Start isEmpty. Operand 135059 states and 201215 transitions. [2020-10-23 19:07:55,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-10-23 19:07:55,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:07:55,651 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:07:55,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-23 19:07:55,652 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:07:55,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:07:55,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1258590834, now seen corresponding path program 1 times [2020-10-23 19:07:55,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:07:55,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14041101] [2020-10-23 19:07:55,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:07:55,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:07:57,230 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification that was a NOOP. DAG size: 352 [2020-10-23 19:07:57,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:07:57,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:07:57,428 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 19:07:57,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14041101] [2020-10-23 19:07:57,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:07:57,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 19:07:57,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573991109] [2020-10-23 19:07:57,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 19:07:57,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:07:57,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 19:07:57,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:07:57,431 INFO L87 Difference]: Start difference. First operand 135059 states and 201215 transitions. Second operand 5 states. [2020-10-23 19:08:15,582 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification that was a NOOP. DAG size: 358 [2020-10-23 19:08:22,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:08:22,535 INFO L93 Difference]: Finished difference Result 399508 states and 594218 transitions. [2020-10-23 19:08:22,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 19:08:22,536 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 334 [2020-10-23 19:08:22,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:08:23,151 INFO L225 Difference]: With dead ends: 399508 [2020-10-23 19:08:23,152 INFO L226 Difference]: Without dead ends: 264735 [2020-10-23 19:08:23,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 19:08:23,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264735 states. [2020-10-23 19:08:35,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264735 to 264346. [2020-10-23 19:08:35,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264346 states. [2020-10-23 19:08:36,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264346 states to 264346 states and 391023 transitions. [2020-10-23 19:08:36,736 INFO L78 Accepts]: Start accepts. Automaton has 264346 states and 391023 transitions. Word has length 334 [2020-10-23 19:08:36,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:08:36,736 INFO L481 AbstractCegarLoop]: Abstraction has 264346 states and 391023 transitions. [2020-10-23 19:08:36,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 19:08:36,736 INFO L276 IsEmpty]: Start isEmpty. Operand 264346 states and 391023 transitions. [2020-10-23 19:08:36,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-10-23 19:08:36,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:08:36,955 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:08:36,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-23 19:08:36,955 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:08:36,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:08:36,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1660486703, now seen corresponding path program 1 times [2020-10-23 19:08:36,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:08:36,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686179847] [2020-10-23 19:08:36,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:08:37,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:08:38,433 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification that was a NOOP. DAG size: 352 [2020-10-23 19:08:38,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:08:38,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:08:38,722 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 19:08:38,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686179847] [2020-10-23 19:08:38,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:08:38,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:08:38,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674796114] [2020-10-23 19:08:38,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:08:38,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:08:38,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:08:38,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:08:38,725 INFO L87 Difference]: Start difference. First operand 264346 states and 391023 transitions. Second operand 4 states. [2020-10-23 19:09:06,437 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification that was a NOOP. DAG size: 357 [2020-10-23 19:09:17,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:09:17,393 INFO L93 Difference]: Finished difference Result 780277 states and 1151721 transitions. [2020-10-23 19:09:17,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:09:17,395 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 336 [2020-10-23 19:09:17,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:09:18,979 INFO L225 Difference]: With dead ends: 780277 [2020-10-23 19:09:18,979 INFO L226 Difference]: Without dead ends: 518448 [2020-10-23 19:09:19,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:09:19,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518448 states. [2020-10-23 19:09:44,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518448 to 518059. [2020-10-23 19:09:44,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 518059 states. [2020-10-23 19:09:47,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518059 states to 518059 states and 760801 transitions. [2020-10-23 19:09:47,625 INFO L78 Accepts]: Start accepts. Automaton has 518059 states and 760801 transitions. Word has length 336 [2020-10-23 19:09:47,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:09:47,626 INFO L481 AbstractCegarLoop]: Abstraction has 518059 states and 760801 transitions. [2020-10-23 19:09:47,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:09:47,626 INFO L276 IsEmpty]: Start isEmpty. Operand 518059 states and 760801 transitions. [2020-10-23 19:09:48,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-10-23 19:09:48,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:09:48,905 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:09:48,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-23 19:09:48,906 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:09:48,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:09:48,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1707502836, now seen corresponding path program 1 times [2020-10-23 19:09:48,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:09:48,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978912382] [2020-10-23 19:09:48,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:09:48,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat