/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 --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem05_label10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 10:40:37,364 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 10:40:37,367 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 10:40:37,403 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 10:40:37,404 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 10:40:37,405 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 10:40:37,407 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 10:40:37,410 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 10:40:37,412 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 10:40:37,414 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 10:40:37,415 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 10:40:37,417 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 10:40:37,417 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 10:40:37,419 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 10:40:37,420 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 10:40:37,422 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 10:40:37,423 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 10:40:37,424 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 10:40:37,443 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 10:40:37,448 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 10:40:37,452 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 10:40:37,458 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 10:40:37,460 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 10:40:37,463 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 10:40:37,469 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 10:40:37,469 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 10:40:37,470 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 10:40:37,476 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 10:40:37,477 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 10:40:37,478 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 10:40:37,478 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 10:40:37,479 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 10:40:37,481 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 10:40:37,482 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 10:40:37,483 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 10:40:37,483 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 10:40:37,484 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 10:40:37,484 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 10:40:37,485 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 10:40:37,486 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 10:40:37,486 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 10:40:37,487 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 10:40:37,549 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 10:40:37,549 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 10:40:37,554 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 10:40:37,555 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 10:40:37,555 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 10:40:37,555 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 10:40:37,556 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 10:40:37,556 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 10:40:37,556 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 10:40:37,556 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 10:40:37,557 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 10:40:37,558 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 10:40:37,558 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 10:40:37,558 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 10:40:37,558 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 10:40:37,559 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 10:40:37,559 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 10:40:37,559 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 10:40:37,560 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 10:40:37,560 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 10:40:37,560 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 10:40:37,560 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 10:40:37,560 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 10:40:37,561 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 10:40:37,561 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 10:40:37,561 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 10:40:37,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 10:40:37,562 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 10:40:37,562 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 10:40:37,562 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-2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 10:40:38,045 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 10:40:38,075 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 10:40:38,078 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 10:40:38,080 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 10:40:38,080 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 10:40:38,081 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem05_label10.c [2020-10-28 10:40:38,175 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a27c15ebd/f9f494fc077f461799d75f1be5968e27/FLAG702ee2ea9 [2020-10-28 10:40:39,519 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 10:40:39,520 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem05_label10.c [2020-10-28 10:40:39,565 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a27c15ebd/f9f494fc077f461799d75f1be5968e27/FLAG702ee2ea9 [2020-10-28 10:40:39,652 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a27c15ebd/f9f494fc077f461799d75f1be5968e27 [2020-10-28 10:40:39,659 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 10:40:39,668 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 10:40:39,670 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 10:40:39,670 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 10:40:39,675 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 10:40:39,675 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:40:39" (1/1) ... [2020-10-28 10:40:39,680 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dd0bfa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:40:39, skipping insertion in model container [2020-10-28 10:40:39,680 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:40:39" (1/1) ... [2020-10-28 10:40:39,689 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 10:40:39,960 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 10:40:42,239 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 10:40:42,257 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 10:40:43,442 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 10:40:43,519 INFO L208 MainTranslator]: Completed translation [2020-10-28 10:40:43,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:40:43 WrapperNode [2020-10-28 10:40:43,521 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 10:40:43,522 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 10:40:43,522 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 10:40:43,522 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 10:40:43,537 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:40:43" (1/1) ... [2020-10-28 10:40:43,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:40:43" (1/1) ... [2020-10-28 10:40:43,691 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:40:43" (1/1) ... [2020-10-28 10:40:43,691 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:40:43" (1/1) ... [2020-10-28 10:40:44,014 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:40:43" (1/1) ... [2020-10-28 10:40:44,071 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:40:43" (1/1) ... [2020-10-28 10:40:44,137 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:40:43" (1/1) ... [2020-10-28 10:40:44,226 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 10:40:44,228 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 10:40:44,228 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 10:40:44,228 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 10:40:44,229 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:40:43" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-28 10:40:44,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 10:40:44,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 10:40:44,319 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 10:40:44,320 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 10:40:44,320 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 10:40:44,320 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-28 10:40:44,320 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-28 10:40:44,320 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-28 10:40:44,321 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-28 10:40:44,321 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output7 [2020-10-28 10:40:44,321 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output8 [2020-10-28 10:40:44,321 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 10:40:44,321 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 10:40:44,321 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 10:40:44,322 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-28 10:40:44,322 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-28 10:40:44,322 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-28 10:40:44,322 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-28 10:40:44,322 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output7 [2020-10-28 10:40:44,322 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output8 [2020-10-28 10:40:44,323 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 10:40:44,323 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 10:40:44,323 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 10:40:44,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 10:40:44,323 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 10:40:44,324 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 10:40:44,324 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 10:40:44,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 10:40:44,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 10:40:44,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 10:40:44,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 10:40:44,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 10:40:44,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 10:40:54,190 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 10:40:54,191 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 10:40:54,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:40:54 BoogieIcfgContainer [2020-10-28 10:40:54,198 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 10:40:54,202 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 10:40:54,203 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 10:40:54,206 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 10:40:54,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 10:40:39" (1/3) ... [2020-10-28 10:40:54,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71c85b70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:40:54, skipping insertion in model container [2020-10-28 10:40:54,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:40:43" (2/3) ... [2020-10-28 10:40:54,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71c85b70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:40:54, skipping insertion in model container [2020-10-28 10:40:54,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:40:54" (3/3) ... [2020-10-28 10:40:54,211 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label10.c [2020-10-28 10:40:54,223 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 10:40:54,230 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 10:40:54,246 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 10:40:54,299 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 10:40:54,299 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 10:40:54,299 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 10:40:54,300 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 10:40:54,300 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 10:40:54,300 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 10:40:54,300 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 10:40:54,300 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 10:40:54,363 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states. [2020-10-28 10:40:54,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1701 [2020-10-28 10:40:54,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:40:54,514 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, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:40:54,515 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:40:54,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:40:54,522 INFO L82 PathProgramCache]: Analyzing trace with hash -296581097, now seen corresponding path program 1 times [2020-10-28 10:40:54,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:40:54,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1272339216] [2020-10-28 10:40:54,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:40:55,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:40:56,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:41:01,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:41:01,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1724 [2020-10-28 10:41:01,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:41:01,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5295 [2020-10-28 10:41:01,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:41:01,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:41:01,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 10:41:01,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:41:01,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1715 [2020-10-28 10:41:01,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 10:41:03,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:41:03,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:41:03,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:41:03,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:41:03,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:41:03,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:41:03,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-28 10:41:03,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:41:03,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:41:03,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:41:03,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:41:03,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:41:03,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:41:06,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:41:06,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1272339216] [2020-10-28 10:41:06,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:41:06,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 10:41:06,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571193716] [2020-10-28 10:41:06,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 10:41:06,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:41:06,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 10:41:06,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 10:41:06,333 INFO L87 Difference]: Start difference. First operand 2226 states. Second operand 4 states. [2020-10-28 10:41:29,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:41:29,836 INFO L93 Difference]: Finished difference Result 6315 states and 11856 transitions. [2020-10-28 10:41:29,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:41:29,844 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1700 [2020-10-28 10:41:29,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:41:29,911 INFO L225 Difference]: With dead ends: 6315 [2020-10-28 10:41:29,911 INFO L226 Difference]: Without dead ends: 4025 [2020-10-28 10:41:29,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:41:29,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4025 states. [2020-10-28 10:41:30,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4025 to 3998. [2020-10-28 10:41:30,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3998 states. [2020-10-28 10:41:30,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3998 states to 3998 states and 6428 transitions. [2020-10-28 10:41:30,207 INFO L78 Accepts]: Start accepts. Automaton has 3998 states and 6428 transitions. Word has length 1700 [2020-10-28 10:41:30,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:41:30,215 INFO L481 AbstractCegarLoop]: Abstraction has 3998 states and 6428 transitions. [2020-10-28 10:41:30,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 10:41:30,216 INFO L276 IsEmpty]: Start isEmpty. Operand 3998 states and 6428 transitions. [2020-10-28 10:41:30,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1710 [2020-10-28 10:41:30,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:41:30,406 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:41:30,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 10:41:30,407 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:41:30,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:41:30,409 INFO L82 PathProgramCache]: Analyzing trace with hash -905514989, now seen corresponding path program 1 times [2020-10-28 10:41:30,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:41:30,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2136181701] [2020-10-28 10:41:30,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:41:30,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:41:30,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:41:32,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:41:35,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:41:35,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1735 [2020-10-28 10:41:35,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:41:35,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 10:41:35,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:41:35,597 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:41:35,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:41:35,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:41:35,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 10:41:35,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:41:36,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:41:36,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:41:36,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:41:36,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:41:36,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:41:36,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:41:36,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-28 10:41:36,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:41:36,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:41:36,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:41:36,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:41:36,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:41:36,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:41:36,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:41:36,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:41:36,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:41:36,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:41:36,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 10:41:36,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:41:36,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 10:41:36,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:41:36,656 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:41:36,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:41:36,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:41:36,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 10:41:36,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:41:37,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:41:37,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2136181701] [2020-10-28 10:41:37,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:41:37,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 10:41:37,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650060974] [2020-10-28 10:41:37,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:41:37,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:41:37,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:41:37,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:41:37,933 INFO L87 Difference]: Start difference. First operand 3998 states and 6428 transitions. Second operand 7 states. [2020-10-28 10:42:11,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:42:11,725 INFO L93 Difference]: Finished difference Result 11930 states and 19289 transitions. [2020-10-28 10:42:11,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 10:42:11,727 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1709 [2020-10-28 10:42:11,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:42:11,781 INFO L225 Difference]: With dead ends: 11930 [2020-10-28 10:42:11,782 INFO L226 Difference]: Without dead ends: 7938 [2020-10-28 10:42:11,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:42:11,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7938 states. [2020-10-28 10:42:12,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7938 to 7745. [2020-10-28 10:42:12,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7745 states. [2020-10-28 10:42:12,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7745 states to 7745 states and 11188 transitions. [2020-10-28 10:42:12,082 INFO L78 Accepts]: Start accepts. Automaton has 7745 states and 11188 transitions. Word has length 1709 [2020-10-28 10:42:12,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:42:12,083 INFO L481 AbstractCegarLoop]: Abstraction has 7745 states and 11188 transitions. [2020-10-28 10:42:12,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:42:12,083 INFO L276 IsEmpty]: Start isEmpty. Operand 7745 states and 11188 transitions. [2020-10-28 10:42:12,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1712 [2020-10-28 10:42:12,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:42:12,222 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:42:12,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 10:42:12,223 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:42:12,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:42:12,226 INFO L82 PathProgramCache]: Analyzing trace with hash 192053519, now seen corresponding path program 1 times [2020-10-28 10:42:12,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:42:12,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1050449852] [2020-10-28 10:42:12,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:42:12,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:42:12,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:42:13,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:42:17,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:42:17,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1737 [2020-10-28 10:42:17,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:42:17,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5204 [2020-10-28 10:42:17,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:42:17,888 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:42:17,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:42:17,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:42:17,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 10:42:17,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:42:18,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:42:18,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:42:18,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:42:18,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:42:18,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:42:18,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:42:18,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 10:42:18,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:42:18,961 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:42:18,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:42:18,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:42:18,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:42:18,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:42:18,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:42:18,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:42:18,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:42:19,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:42:19,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-28 10:42:19,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:42:19,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 10:42:19,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:42:19,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:42:19,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:42:19,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:42:19,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 10:42:19,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:42:20,290 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:42:20,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1050449852] [2020-10-28 10:42:20,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:42:20,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 10:42:20,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171721399] [2020-10-28 10:42:20,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:42:20,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:42:20,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:42:20,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:42:20,295 INFO L87 Difference]: Start difference. First operand 7745 states and 11188 transitions. Second operand 7 states. [2020-10-28 10:42:50,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:42:50,960 INFO L93 Difference]: Finished difference Result 23211 states and 34235 transitions. [2020-10-28 10:42:50,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 10:42:50,961 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1711 [2020-10-28 10:42:50,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:42:51,049 INFO L225 Difference]: With dead ends: 23211 [2020-10-28 10:42:51,052 INFO L226 Difference]: Without dead ends: 15472 [2020-10-28 10:42:51,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:42:51,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15472 states. [2020-10-28 10:42:51,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15472 to 15205. [2020-10-28 10:42:51,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15205 states. [2020-10-28 10:42:51,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15205 states to 15205 states and 20569 transitions. [2020-10-28 10:42:51,539 INFO L78 Accepts]: Start accepts. Automaton has 15205 states and 20569 transitions. Word has length 1711 [2020-10-28 10:42:51,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:42:51,540 INFO L481 AbstractCegarLoop]: Abstraction has 15205 states and 20569 transitions. [2020-10-28 10:42:51,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:42:51,540 INFO L276 IsEmpty]: Start isEmpty. Operand 15205 states and 20569 transitions. [2020-10-28 10:42:51,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1723 [2020-10-28 10:42:51,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:42:51,628 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:42:51,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 10:42:51,628 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:42:51,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:42:51,630 INFO L82 PathProgramCache]: Analyzing trace with hash 666451480, now seen corresponding path program 1 times [2020-10-28 10:42:51,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:42:51,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652930651] [2020-10-28 10:42:51,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:42:51,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:42:52,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:42:52,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:42:53,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:42:57,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:42:57,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1748 [2020-10-28 10:42:57,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:42:57,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5071 [2020-10-28 10:42:57,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:42:57,072 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:42:57,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:42:57,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:42:57,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 10:42:57,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:42:57,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:42:57,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:42:57,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:42:57,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:42:57,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:42:57,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:42:57,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 10:42:57,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:42:57,610 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:42:57,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:42:57,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:42:57,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:42:57,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:42:57,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:42:57,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:42:57,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:42:57,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:42:57,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 10:42:57,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:42:57,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-28 10:42:57,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:42:57,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:42:57,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:42:57,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:42:57,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 10:42:57,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:42:59,030 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:42:59,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652930651] [2020-10-28 10:42:59,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:42:59,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 10:42:59,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082587285] [2020-10-28 10:42:59,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:42:59,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:42:59,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:42:59,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:42:59,044 INFO L87 Difference]: Start difference. First operand 15205 states and 20569 transitions. Second operand 7 states. [2020-10-28 10:43:29,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:43:29,241 INFO L93 Difference]: Finished difference Result 39393 states and 55086 transitions. [2020-10-28 10:43:29,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 10:43:29,242 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1722 [2020-10-28 10:43:29,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:43:29,359 INFO L225 Difference]: With dead ends: 39393 [2020-10-28 10:43:29,360 INFO L226 Difference]: Without dead ends: 24194 [2020-10-28 10:43:29,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-28 10:43:29,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24194 states. [2020-10-28 10:43:30,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24194 to 23160. [2020-10-28 10:43:30,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23160 states. [2020-10-28 10:43:30,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23160 states to 23160 states and 29798 transitions. [2020-10-28 10:43:30,100 INFO L78 Accepts]: Start accepts. Automaton has 23160 states and 29798 transitions. Word has length 1722 [2020-10-28 10:43:30,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:43:30,100 INFO L481 AbstractCegarLoop]: Abstraction has 23160 states and 29798 transitions. [2020-10-28 10:43:30,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:43:30,101 INFO L276 IsEmpty]: Start isEmpty. Operand 23160 states and 29798 transitions. [2020-10-28 10:43:30,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1829 [2020-10-28 10:43:30,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:43:30,350 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:43:30,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 10:43:30,350 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:43:30,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:43:30,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1368846077, now seen corresponding path program 1 times [2020-10-28 10:43:30,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:43:30,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857733364] [2020-10-28 10:43:30,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:43:30,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:43:30,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:43:31,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:43:34,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:43:35,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:43:35,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1856 [2020-10-28 10:43:35,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:43:35,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-28 10:43:35,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:43:35,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:43:35,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:43:35,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 123 [2020-10-28 10:43:35,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 10:43:35,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:43:35,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:43:35,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:43:35,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:43:35,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:43:35,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:43:35,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:43:35,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 10:43:35,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:43:35,962 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:43:35,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:43:35,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:43:35,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:43:35,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:43:35,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:43:36,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:43:36,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:43:36,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:43:36,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-28 10:43:36,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:43:36,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-28 10:43:36,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:43:36,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:43:36,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:43:36,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:43:36,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-28 10:43:36,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:43:36,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-10-28 10:43:36,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:43:36,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:43:36,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:43:36,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 10:43:36,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:43:36,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-28 10:43:36,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:43:36,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:43:36,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:43:36,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:43:36,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 10:43:36,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:43:37,821 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 130 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 10:43:37,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857733364] [2020-10-28 10:43:37,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:43:37,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:43:37,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178160225] [2020-10-28 10:43:37,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:43:37,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:43:37,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:43:37,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:43:37,825 INFO L87 Difference]: Start difference. First operand 23160 states and 29798 transitions. Second operand 7 states. [2020-10-28 10:44:06,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:44:06,529 INFO L93 Difference]: Finished difference Result 57537 states and 74802 transitions. [2020-10-28 10:44:06,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 10:44:06,530 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1828 [2020-10-28 10:44:06,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:44:06,632 INFO L225 Difference]: With dead ends: 57537 [2020-10-28 10:44:06,633 INFO L226 Difference]: Without dead ends: 34383 [2020-10-28 10:44:06,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:44:06,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34383 states. [2020-10-28 10:44:07,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34383 to 34151. [2020-10-28 10:44:07,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34151 states. [2020-10-28 10:44:07,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34151 states to 34151 states and 40774 transitions. [2020-10-28 10:44:07,393 INFO L78 Accepts]: Start accepts. Automaton has 34151 states and 40774 transitions. Word has length 1828 [2020-10-28 10:44:07,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:44:07,394 INFO L481 AbstractCegarLoop]: Abstraction has 34151 states and 40774 transitions. [2020-10-28 10:44:07,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:44:07,394 INFO L276 IsEmpty]: Start isEmpty. Operand 34151 states and 40774 transitions. [2020-10-28 10:44:07,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1832 [2020-10-28 10:44:07,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:44:07,481 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:44:07,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 10:44:07,482 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:44:07,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:44:07,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1849107046, now seen corresponding path program 1 times [2020-10-28 10:44:07,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:44:07,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856169490] [2020-10-28 10:44:07,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:44:07,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:44:07,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:44:08,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:44:10,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:44:13,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:44:13,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1859 [2020-10-28 10:44:13,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:44:13,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5393 [2020-10-28 10:44:13,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:44:13,073 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:44:13,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:44:13,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 123 [2020-10-28 10:44:13,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 10:44:13,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:44:13,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:44:13,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:44:13,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:44:13,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:44:13,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:44:13,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:44:13,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 10:44:13,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:44:13,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:44:13,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:44:13,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:44:13,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:44:13,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:44:13,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:44:13,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:44:13,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:44:13,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:44:13,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-28 10:44:13,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:44:13,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-28 10:44:13,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:44:13,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:44:13,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:44:13,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:44:13,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-28 10:44:13,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:44:13,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-10-28 10:44:13,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:44:13,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:44:13,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:44:13,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 10:44:13,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:44:13,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-28 10:44:13,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:44:13,673 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:44:13,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:44:13,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:44:13,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 10:44:13,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:44:15,397 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 140 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 10:44:15,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856169490] [2020-10-28 10:44:15,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:44:15,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:44:15,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689041223] [2020-10-28 10:44:15,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:44:15,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:44:15,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:44:15,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:44:15,401 INFO L87 Difference]: Start difference. First operand 34151 states and 40774 transitions. Second operand 7 states.