/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.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 22:36:48,889 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 22:36:48,893 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 22:36:48,948 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 22:36:48,949 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 22:36:48,953 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 22:36:48,957 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 22:36:48,965 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 22:36:48,969 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 22:36:48,975 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 22:36:48,976 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 22:36:48,978 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 22:36:48,978 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 22:36:48,981 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 22:36:48,983 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 22:36:48,985 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 22:36:48,988 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 22:36:48,989 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 22:36:48,997 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 22:36:49,005 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 22:36:49,014 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 22:36:49,016 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 22:36:49,019 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 22:36:49,021 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 22:36:49,030 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-23 22:36:49,031 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-23 22:36:49,031 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-23 22:36:49,033 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-23 22:36:49,034 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-23 22:36:49,035 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-23 22:36:49,035 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-23 22:36:49,036 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-23 22:36:49,038 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-23 22:36:49,039 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-23 22:36:49,040 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-23 22:36:49,040 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-23 22:36:49,041 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-23 22:36:49,042 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-23 22:36:49,042 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 22:36:49,043 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 22:36:49,044 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 22:36:49,045 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 22:36:49,070 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 22:36:49,070 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 22:36:49,074 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 22:36:49,074 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 22:36:49,075 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 22:36:49,075 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 22:36:49,075 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 22:36:49,075 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 22:36:49,076 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 22:36:49,076 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 22:36:49,077 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 22:36:49,077 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 22:36:49,078 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 22:36:49,078 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 22:36:49,079 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 22:36:49,079 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 22:36:49,079 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 22:36:49,079 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 22:36:49,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 22:36:49,080 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 22:36:49,080 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 22:36:49,080 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 22:36:49,080 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-23 22:36:49,484 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 22:36:49,509 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 22:36:49,512 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 22:36:49,513 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 22:36:49,514 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 22:36:49,515 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2021-02-23 22:36:49,591 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/510a029b0/5f5dfaaffcab40b581ad5fac811bdcfb/FLAGa01c88a7f [2021-02-23 22:36:50,251 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 22:36:50,252 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2021-02-23 22:36:50,261 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/510a029b0/5f5dfaaffcab40b581ad5fac811bdcfb/FLAGa01c88a7f [2021-02-23 22:36:50,597 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/510a029b0/5f5dfaaffcab40b581ad5fac811bdcfb [2021-02-23 22:36:50,599 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 22:36:50,613 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 22:36:50,614 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 22:36:50,615 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 22:36:50,619 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 22:36:50,620 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:36:50" (1/1) ... [2021-02-23 22:36:50,621 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78aff728 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:36:50, skipping insertion in model container [2021-02-23 22:36:50,621 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:36:50" (1/1) ... [2021-02-23 22:36:50,630 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 22:36:50,679 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 22:36:50,875 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c[423,436] [2021-02-23 22:36:50,925 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 22:36:50,935 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 22:36:50,948 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c[423,436] [2021-02-23 22:36:50,979 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 22:36:51,004 INFO L208 MainTranslator]: Completed translation [2021-02-23 22:36:51,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:36:51 WrapperNode [2021-02-23 22:36:51,005 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 22:36:51,008 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 22:36:51,008 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 22:36:51,008 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 22:36:51,023 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:36:51" (1/1) ... [2021-02-23 22:36:51,023 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:36:51" (1/1) ... [2021-02-23 22:36:51,031 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:36:51" (1/1) ... [2021-02-23 22:36:51,032 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:36:51" (1/1) ... [2021-02-23 22:36:51,043 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:36:51" (1/1) ... [2021-02-23 22:36:51,050 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:36:51" (1/1) ... [2021-02-23 22:36:51,052 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:36:51" (1/1) ... [2021-02-23 22:36:51,056 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 22:36:51,057 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 22:36:51,057 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 22:36:51,058 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 22:36:51,058 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:36:51" (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 [2021-02-23 22:36:51,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 22:36:51,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 22:36:51,157 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 22:36:51,157 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-23 22:36:51,157 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2021-02-23 22:36:51,158 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2021-02-23 22:36:51,158 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2021-02-23 22:36:51,158 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 22:36:51,158 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 22:36:51,158 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 22:36:51,158 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 22:36:51,159 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 22:36:51,159 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-02-23 22:36:51,159 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-02-23 22:36:51,159 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-23 22:36:51,159 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2021-02-23 22:36:51,159 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2021-02-23 22:36:51,160 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2021-02-23 22:36:51,160 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 22:36:51,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 22:36:51,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 22:36:51,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 22:36:51,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 22:36:51,161 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 22:36:51,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 22:36:51,763 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 22:36:51,763 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-02-23 22:36:51,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:36:51 BoogieIcfgContainer [2021-02-23 22:36:51,766 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 22:36:51,767 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 22:36:51,767 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 22:36:51,771 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 22:36:51,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 10:36:50" (1/3) ... [2021-02-23 22:36:51,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c84640 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:36:51, skipping insertion in model container [2021-02-23 22:36:51,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:36:51" (2/3) ... [2021-02-23 22:36:51,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c84640 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:36:51, skipping insertion in model container [2021-02-23 22:36:51,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:36:51" (3/3) ... [2021-02-23 22:36:51,774 INFO L111 eAbstractionObserver]: Analyzing ICFG soft_float_5a.c.cil.c [2021-02-23 22:36:51,781 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 22:36:51,786 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 22:36:51,804 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 22:36:51,829 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 22:36:51,829 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 22:36:51,829 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-23 22:36:51,829 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 22:36:51,829 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 22:36:51,830 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 22:36:51,830 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 22:36:51,830 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 22:36:51,850 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states. [2021-02-23 22:36:51,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-02-23 22:36:51,867 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:36:51,868 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:36:51,868 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:36:51,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:36:51,875 INFO L82 PathProgramCache]: Analyzing trace with hash -485643019, now seen corresponding path program 1 times [2021-02-23 22:36:51,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:36:51,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934953646] [2021-02-23 22:36:51,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:36:52,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:52,248 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:52,250 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:52,254 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:52,255 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 22:36:52,272 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:52,273 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:52,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:36:52,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:52,360 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:52,360 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:52,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:36:52,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:52,375 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:52,376 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:52,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:36:52,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:52,388 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:52,389 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:52,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-02-23 22:36:52,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:52,400 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:52,401 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:52,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-02-23 22:36:52,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:52,417 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:52,420 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:52,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-02-23 22:36:52,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:52,454 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:52,455 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:52,501 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-02-23 22:36:52,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934953646] [2021-02-23 22:36:52,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 22:36:52,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 22:36:52,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611551076] [2021-02-23 22:36:52,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 22:36:52,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:36:52,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 22:36:52,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 22:36:52,535 INFO L87 Difference]: Start difference. First operand 161 states. Second operand 4 states. [2021-02-23 22:36:53,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:36:53,087 INFO L93 Difference]: Finished difference Result 262 states and 318 transitions. [2021-02-23 22:36:53,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 22:36:53,089 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 108 [2021-02-23 22:36:53,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:36:53,102 INFO L225 Difference]: With dead ends: 262 [2021-02-23 22:36:53,102 INFO L226 Difference]: Without dead ends: 134 [2021-02-23 22:36:53,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 22:36:53,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-02-23 22:36:53,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2021-02-23 22:36:53,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2021-02-23 22:36:53,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 152 transitions. [2021-02-23 22:36:53,177 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 152 transitions. Word has length 108 [2021-02-23 22:36:53,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:36:53,179 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 152 transitions. [2021-02-23 22:36:53,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 22:36:53,179 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 152 transitions. [2021-02-23 22:36:53,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-02-23 22:36:53,183 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:36:53,183 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:36:53,183 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 22:36:53,184 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:36:53,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:36:53,184 INFO L82 PathProgramCache]: Analyzing trace with hash 347783644, now seen corresponding path program 1 times [2021-02-23 22:36:53,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:36:53,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1709744849] [2021-02-23 22:36:53,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:36:53,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:53,251 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:53,252 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:53,256 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:53,256 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:36:53,260 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:53,262 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:36:53,267 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:53,269 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:53,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:36:53,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:53,308 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:53,308 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:53,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:36:53,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:53,326 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:53,327 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:53,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:36:53,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:53,334 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:53,335 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:53,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-02-23 22:36:53,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:53,348 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:53,349 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:53,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-02-23 22:36:53,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:53,358 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:53,359 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:53,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-02-23 22:36:53,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:53,373 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:53,373 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:53,398 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-02-23 22:36:53,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1709744849] [2021-02-23 22:36:53,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 22:36:53,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 22:36:53,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061925849] [2021-02-23 22:36:53,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 22:36:53,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:36:53,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 22:36:53,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-23 22:36:53,402 INFO L87 Difference]: Start difference. First operand 134 states and 152 transitions. Second operand 5 states. [2021-02-23 22:36:53,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:36:53,799 INFO L93 Difference]: Finished difference Result 150 states and 170 transitions. [2021-02-23 22:36:53,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 22:36:53,800 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 110 [2021-02-23 22:36:53,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:36:53,803 INFO L225 Difference]: With dead ends: 150 [2021-02-23 22:36:53,803 INFO L226 Difference]: Without dead ends: 133 [2021-02-23 22:36:53,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-02-23 22:36:53,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-02-23 22:36:53,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-02-23 22:36:53,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2021-02-23 22:36:53,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 150 transitions. [2021-02-23 22:36:53,832 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 150 transitions. Word has length 110 [2021-02-23 22:36:53,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:36:53,833 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 150 transitions. [2021-02-23 22:36:53,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 22:36:53,833 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 150 transitions. [2021-02-23 22:36:53,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-02-23 22:36:53,835 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:36:53,835 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:36:53,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 22:36:53,836 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:36:53,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:36:53,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1662879100, now seen corresponding path program 1 times [2021-02-23 22:36:53,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:36:53,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1297529754] [2021-02-23 22:36:53,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:36:53,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:53,904 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:53,905 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:53,905 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:53,908 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:53,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:36:53,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:53,944 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:53,945 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:53,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:36:53,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:53,959 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:53,962 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:53,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:36:53,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:53,981 WARN L141 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size [2021-02-23 22:36:53,981 WARN L147 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size 7 [2021-02-23 22:36:53,988 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:53,989 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:36:53,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-02-23 22:36:53,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:53,998 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:53,999 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:53,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-02-23 22:36:54,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:54,003 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:54,004 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:54,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-02-23 22:36:54,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:54,010 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:54,010 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:54,047 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-02-23 22:36:54,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1297529754] [2021-02-23 22:36:54,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:36:54,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-02-23 22:36:54,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388262853] [2021-02-23 22:36:54,049 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 22:36:54,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:36:54,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 22:36:54,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-23 22:36:54,050 INFO L87 Difference]: Start difference. First operand 133 states and 150 transitions. Second operand 5 states. [2021-02-23 22:36:54,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:36:54,498 INFO L93 Difference]: Finished difference Result 271 states and 318 transitions. [2021-02-23 22:36:54,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-23 22:36:54,499 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 110 [2021-02-23 22:36:54,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:36:54,503 INFO L225 Difference]: With dead ends: 271 [2021-02-23 22:36:54,503 INFO L226 Difference]: Without dead ends: 174 [2021-02-23 22:36:54,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-02-23 22:36:54,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-02-23 22:36:54,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 151. [2021-02-23 22:36:54,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2021-02-23 22:36:54,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 173 transitions. [2021-02-23 22:36:54,538 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 173 transitions. Word has length 110 [2021-02-23 22:36:54,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:36:54,539 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 173 transitions. [2021-02-23 22:36:54,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 22:36:54,539 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 173 transitions. [2021-02-23 22:36:54,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-02-23 22:36:54,541 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:36:54,541 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:36:54,542 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 22:36:54,542 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:36:54,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:36:54,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1400205347, now seen corresponding path program 1 times [2021-02-23 22:36:54,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:36:54,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227364521] [2021-02-23 22:36:54,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:36:54,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:54,569 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:54,570 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:54,571 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:54,571 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:54,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:36:54,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:54,600 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:54,600 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:54,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:36:54,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:54,604 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:54,605 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:54,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:36:54,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:54,615 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:54,616 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:54,617 WARN L141 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size [2021-02-23 22:36:54,618 WARN L147 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size 7 [2021-02-23 22:36:54,625 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:54,626 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:36:54,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-02-23 22:36:54,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:54,635 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:54,636 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:54,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-02-23 22:36:54,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:54,640 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:54,641 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:54,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-02-23 22:36:54,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:54,646 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:54,647 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:54,689 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-02-23 22:36:54,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227364521] [2021-02-23 22:36:54,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:36:54,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-02-23 22:36:54,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294885090] [2021-02-23 22:36:54,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 22:36:54,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:36:54,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 22:36:54,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-23 22:36:54,692 INFO L87 Difference]: Start difference. First operand 151 states and 173 transitions. Second operand 5 states. [2021-02-23 22:36:55,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:36:55,162 INFO L93 Difference]: Finished difference Result 282 states and 331 transitions. [2021-02-23 22:36:55,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 22:36:55,162 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 113 [2021-02-23 22:36:55,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:36:55,165 INFO L225 Difference]: With dead ends: 282 [2021-02-23 22:36:55,165 INFO L226 Difference]: Without dead ends: 175 [2021-02-23 22:36:55,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-02-23 22:36:55,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-02-23 22:36:55,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 163. [2021-02-23 22:36:55,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2021-02-23 22:36:55,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 189 transitions. [2021-02-23 22:36:55,203 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 189 transitions. Word has length 113 [2021-02-23 22:36:55,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:36:55,207 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 189 transitions. [2021-02-23 22:36:55,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 22:36:55,208 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 189 transitions. [2021-02-23 22:36:55,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-02-23 22:36:55,209 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:36:55,210 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-02-23 22:36:55,210 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 22:36:55,210 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:36:55,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:36:55,211 INFO L82 PathProgramCache]: Analyzing trace with hash -136962435, now seen corresponding path program 1 times [2021-02-23 22:36:55,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:36:55,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230472241] [2021-02-23 22:36:55,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:36:55,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:55,240 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:55,240 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:55,241 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:55,241 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:55,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:36:55,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:55,281 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:55,281 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:55,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:36:55,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:55,286 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:55,286 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:55,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:36:55,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:55,299 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:55,300 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:55,301 WARN L141 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size [2021-02-23 22:36:55,302 WARN L147 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size 7 [2021-02-23 22:36:55,310 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:55,311 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:36:55,320 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:55,320 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:36:55,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-02-23 22:36:55,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:55,331 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:55,332 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:55,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-02-23 22:36:55,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:55,342 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:55,343 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:55,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-02-23 22:36:55,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:55,348 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:55,349 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:55,373 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-02-23 22:36:55,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [230472241] [2021-02-23 22:36:55,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:36:55,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-02-23 22:36:55,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661634762] [2021-02-23 22:36:55,375 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 22:36:55,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:36:55,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 22:36:55,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 22:36:55,376 INFO L87 Difference]: Start difference. First operand 163 states and 189 transitions. Second operand 6 states. [2021-02-23 22:36:55,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:36:55,931 INFO L93 Difference]: Finished difference Result 318 states and 375 transitions. [2021-02-23 22:36:55,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-23 22:36:55,931 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 118 [2021-02-23 22:36:55,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:36:55,939 INFO L225 Difference]: With dead ends: 318 [2021-02-23 22:36:55,939 INFO L226 Difference]: Without dead ends: 198 [2021-02-23 22:36:55,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-02-23 22:36:55,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-02-23 22:36:55,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 179. [2021-02-23 22:36:55,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2021-02-23 22:36:55,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 208 transitions. [2021-02-23 22:36:55,999 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 208 transitions. Word has length 118 [2021-02-23 22:36:56,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:36:56,000 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 208 transitions. [2021-02-23 22:36:56,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 22:36:56,000 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 208 transitions. [2021-02-23 22:36:56,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-02-23 22:36:56,002 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:36:56,002 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:36:56,003 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 22:36:56,003 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:36:56,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:36:56,003 INFO L82 PathProgramCache]: Analyzing trace with hash -2147349713, now seen corresponding path program 1 times [2021-02-23 22:36:56,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:36:56,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036943617] [2021-02-23 22:36:56,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:36:56,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:56,048 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:56,049 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:56,052 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:56,053 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:56,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:36:56,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:56,082 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:56,084 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:56,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:36:56,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:56,088 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:56,089 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:56,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:36:56,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:56,117 WARN L141 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size [2021-02-23 22:36:56,122 WARN L147 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size 7 [2021-02-23 22:36:56,134 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.6 percent of original size [2021-02-23 22:36:56,136 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.6 percent of original size 28 [2021-02-23 22:36:56,173 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:56,174 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:36:56,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-02-23 22:36:56,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:56,184 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:56,184 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:56,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-02-23 22:36:56,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:56,188 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:56,188 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:56,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-02-23 22:36:56,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:56,192 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:56,193 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:56,207 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-02-23 22:36:56,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036943617] [2021-02-23 22:36:56,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:36:56,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-02-23 22:36:56,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088830545] [2021-02-23 22:36:56,208 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 22:36:56,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:36:56,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 22:36:56,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 22:36:56,209 INFO L87 Difference]: Start difference. First operand 179 states and 208 transitions. Second operand 6 states. [2021-02-23 22:36:56,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:36:56,815 INFO L93 Difference]: Finished difference Result 318 states and 375 transitions. [2021-02-23 22:36:56,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-23 22:36:56,816 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 118 [2021-02-23 22:36:56,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:36:56,818 INFO L225 Difference]: With dead ends: 318 [2021-02-23 22:36:56,818 INFO L226 Difference]: Without dead ends: 200 [2021-02-23 22:36:56,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-02-23 22:36:56,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-02-23 22:36:56,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 182. [2021-02-23 22:36:56,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2021-02-23 22:36:56,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 211 transitions. [2021-02-23 22:36:56,852 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 211 transitions. Word has length 118 [2021-02-23 22:36:56,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:36:56,853 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 211 transitions. [2021-02-23 22:36:56,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 22:36:56,853 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 211 transitions. [2021-02-23 22:36:56,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-02-23 22:36:56,855 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:36:56,855 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2021-02-23 22:36:56,855 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 22:36:56,856 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:36:56,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:36:56,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1807329181, now seen corresponding path program 2 times [2021-02-23 22:36:56,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:36:56,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114564691] [2021-02-23 22:36:56,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:36:56,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:56,882 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:56,883 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:56,883 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:56,884 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:56,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:36:56,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:56,907 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:56,907 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:56,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:36:56,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:56,912 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:56,914 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:56,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:36:56,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:56,927 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:56,929 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:56,930 WARN L141 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size [2021-02-23 22:36:56,930 WARN L147 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size 7 [2021-02-23 22:36:56,937 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:56,938 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:36:56,946 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:56,947 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:36:56,955 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:56,956 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:36:56,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-02-23 22:36:56,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:56,965 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:56,966 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:56,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-02-23 22:36:56,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:56,969 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:56,970 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:56,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-02-23 22:36:56,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:56,974 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:56,975 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:56,994 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-02-23 22:36:56,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114564691] [2021-02-23 22:36:56,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:36:56,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-02-23 22:36:56,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039681287] [2021-02-23 22:36:56,996 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-23 22:36:56,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:36:56,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-23 22:36:56,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-02-23 22:36:56,997 INFO L87 Difference]: Start difference. First operand 182 states and 211 transitions. Second operand 7 states. [2021-02-23 22:36:57,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:36:57,670 INFO L93 Difference]: Finished difference Result 352 states and 416 transitions. [2021-02-23 22:36:57,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-23 22:36:57,671 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 123 [2021-02-23 22:36:57,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:36:57,673 INFO L225 Difference]: With dead ends: 352 [2021-02-23 22:36:57,673 INFO L226 Difference]: Without dead ends: 224 [2021-02-23 22:36:57,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-02-23 22:36:57,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-02-23 22:36:57,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 192. [2021-02-23 22:36:57,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2021-02-23 22:36:57,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 224 transitions. [2021-02-23 22:36:57,708 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 224 transitions. Word has length 123 [2021-02-23 22:36:57,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:36:57,708 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 224 transitions. [2021-02-23 22:36:57,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-23 22:36:57,709 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 224 transitions. [2021-02-23 22:36:57,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-02-23 22:36:57,710 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:36:57,711 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-02-23 22:36:57,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-23 22:36:57,711 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:36:57,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:36:57,712 INFO L82 PathProgramCache]: Analyzing trace with hash 477250837, now seen corresponding path program 1 times [2021-02-23 22:36:57,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:36:57,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [445413497] [2021-02-23 22:36:57,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:36:57,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:57,739 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:57,741 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:57,744 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:57,745 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:57,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:36:57,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:57,770 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:57,771 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:57,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:36:57,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:57,773 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:57,774 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:57,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:36:57,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:57,789 WARN L141 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size [2021-02-23 22:36:57,790 WARN L147 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size 7 [2021-02-23 22:36:57,797 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:57,798 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:36:57,810 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.6 percent of original size [2021-02-23 22:36:57,811 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.6 percent of original size 28 [2021-02-23 22:36:57,840 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:57,840 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:36:57,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-02-23 22:36:57,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:57,851 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:57,851 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:57,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-02-23 22:36:57,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:57,854 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:57,855 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:57,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-02-23 22:36:57,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:57,858 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:57,859 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:57,876 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-02-23 22:36:57,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [445413497] [2021-02-23 22:36:57,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:36:57,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-02-23 22:36:57,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220288559] [2021-02-23 22:36:57,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-23 22:36:57,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:36:57,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-23 22:36:57,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-23 22:36:57,879 INFO L87 Difference]: Start difference. First operand 192 states and 224 transitions. Second operand 7 states. [2021-02-23 22:36:58,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:36:58,671 INFO L93 Difference]: Finished difference Result 346 states and 410 transitions. [2021-02-23 22:36:58,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-23 22:36:58,672 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 123 [2021-02-23 22:36:58,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:36:58,674 INFO L225 Difference]: With dead ends: 346 [2021-02-23 22:36:58,674 INFO L226 Difference]: Without dead ends: 220 [2021-02-23 22:36:58,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-02-23 22:36:58,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-02-23 22:36:58,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 192. [2021-02-23 22:36:58,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2021-02-23 22:36:58,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 224 transitions. [2021-02-23 22:36:58,710 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 224 transitions. Word has length 123 [2021-02-23 22:36:58,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:36:58,710 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 224 transitions. [2021-02-23 22:36:58,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-23 22:36:58,710 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 224 transitions. [2021-02-23 22:36:58,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-02-23 22:36:58,712 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:36:58,712 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:36:58,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-23 22:36:58,713 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:36:58,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:36:58,713 INFO L82 PathProgramCache]: Analyzing trace with hash 176971325, now seen corresponding path program 3 times [2021-02-23 22:36:58,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:36:58,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1455312806] [2021-02-23 22:36:58,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:36:58,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:58,741 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:58,742 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:58,742 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:58,743 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:58,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:36:58,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:58,767 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:58,768 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:58,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:36:58,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:58,772 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:58,773 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:58,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:36:58,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:58,787 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:58,787 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:58,789 WARN L141 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size [2021-02-23 22:36:58,789 WARN L147 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size 7 [2021-02-23 22:36:58,797 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:58,798 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:36:58,809 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:58,810 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:36:58,819 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:58,820 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:36:58,832 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:58,833 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:36:58,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-02-23 22:36:58,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:58,844 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:58,845 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:58,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-02-23 22:36:58,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:58,848 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:58,849 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:58,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-02-23 22:36:58,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:58,853 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:58,853 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:58,871 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-02-23 22:36:58,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1455312806] [2021-02-23 22:36:58,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:36:58,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-02-23 22:36:58,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766426383] [2021-02-23 22:36:58,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-23 22:36:58,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:36:58,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-23 22:36:58,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-02-23 22:36:58,873 INFO L87 Difference]: Start difference. First operand 192 states and 224 transitions. Second operand 8 states. [2021-02-23 22:36:59,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:36:59,537 INFO L93 Difference]: Finished difference Result 379 states and 449 transitions. [2021-02-23 22:36:59,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-23 22:36:59,538 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 128 [2021-02-23 22:36:59,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:36:59,541 INFO L225 Difference]: With dead ends: 379 [2021-02-23 22:36:59,541 INFO L226 Difference]: Without dead ends: 246 [2021-02-23 22:36:59,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-02-23 22:36:59,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-02-23 22:36:59,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 202. [2021-02-23 22:36:59,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2021-02-23 22:36:59,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 237 transitions. [2021-02-23 22:36:59,579 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 237 transitions. Word has length 128 [2021-02-23 22:36:59,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:36:59,579 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 237 transitions. [2021-02-23 22:36:59,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-23 22:36:59,579 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 237 transitions. [2021-02-23 22:36:59,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-02-23 22:36:59,581 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:36:59,581 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-02-23 22:36:59,582 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-23 22:36:59,582 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:36:59,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:36:59,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1833415953, now seen corresponding path program 2 times [2021-02-23 22:36:59,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:36:59,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876410758] [2021-02-23 22:36:59,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:36:59,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:59,609 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:59,610 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:59,611 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:59,612 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:59,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:36:59,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:59,636 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:59,637 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:59,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:36:59,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:59,640 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:59,641 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:59,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:36:59,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:59,659 WARN L141 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size [2021-02-23 22:36:59,660 WARN L147 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size 7 [2021-02-23 22:36:59,668 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:59,668 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:36:59,680 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:59,681 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:36:59,695 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.6 percent of original size [2021-02-23 22:36:59,698 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.6 percent of original size 28 [2021-02-23 22:36:59,728 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:59,728 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:36:59,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-02-23 22:36:59,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:59,741 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:59,741 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:59,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-02-23 22:36:59,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:59,744 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:59,745 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:59,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-02-23 22:36:59,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:59,749 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:59,749 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:59,769 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-02-23 22:36:59,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876410758] [2021-02-23 22:36:59,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:36:59,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-02-23 22:36:59,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469835721] [2021-02-23 22:36:59,770 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-23 22:36:59,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:36:59,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-23 22:36:59,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-02-23 22:36:59,771 INFO L87 Difference]: Start difference. First operand 202 states and 237 transitions. Second operand 8 states. [2021-02-23 22:37:00,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:37:00,596 INFO L93 Difference]: Finished difference Result 365 states and 435 transitions. [2021-02-23 22:37:00,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-23 22:37:00,597 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 128 [2021-02-23 22:37:00,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:37:00,599 INFO L225 Difference]: With dead ends: 365 [2021-02-23 22:37:00,599 INFO L226 Difference]: Without dead ends: 234 [2021-02-23 22:37:00,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-02-23 22:37:00,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-02-23 22:37:00,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 202. [2021-02-23 22:37:00,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2021-02-23 22:37:00,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 237 transitions. [2021-02-23 22:37:00,640 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 237 transitions. Word has length 128 [2021-02-23 22:37:00,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:37:00,640 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 237 transitions. [2021-02-23 22:37:00,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-23 22:37:00,641 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 237 transitions. [2021-02-23 22:37:00,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-02-23 22:37:00,643 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:37:00,644 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:37:00,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-23 22:37:00,644 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:37:00,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:37:00,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1941835613, now seen corresponding path program 4 times [2021-02-23 22:37:00,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:37:00,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739817705] [2021-02-23 22:37:00,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:37:00,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:00,674 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:00,674 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:00,675 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:00,675 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:00,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:37:00,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:00,702 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:00,703 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:00,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:37:00,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:00,705 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:00,706 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:00,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:37:00,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:00,724 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:00,727 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:00,728 WARN L141 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size [2021-02-23 22:37:00,729 WARN L147 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size 7 [2021-02-23 22:37:00,736 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:00,737 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:00,746 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:00,747 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:00,758 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:00,759 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:00,788 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:00,789 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:00,802 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:00,803 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:37:00,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-02-23 22:37:00,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:00,816 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:00,816 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:00,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-02-23 22:37:00,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:00,821 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:00,822 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:00,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-02-23 22:37:00,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:00,826 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:00,827 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:00,851 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 6 proven. 50 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-02-23 22:37:00,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739817705] [2021-02-23 22:37:00,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:37:00,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-02-23 22:37:00,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538037685] [2021-02-23 22:37:00,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-23 22:37:00,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:37:00,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-23 22:37:00,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-02-23 22:37:00,854 INFO L87 Difference]: Start difference. First operand 202 states and 237 transitions. Second operand 9 states. [2021-02-23 22:37:01,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:37:01,711 INFO L93 Difference]: Finished difference Result 406 states and 482 transitions. [2021-02-23 22:37:01,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-23 22:37:01,715 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 133 [2021-02-23 22:37:01,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:37:01,718 INFO L225 Difference]: With dead ends: 406 [2021-02-23 22:37:01,718 INFO L226 Difference]: Without dead ends: 268 [2021-02-23 22:37:01,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-02-23 22:37:01,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-02-23 22:37:01,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 212. [2021-02-23 22:37:01,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2021-02-23 22:37:01,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 250 transitions. [2021-02-23 22:37:01,765 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 250 transitions. Word has length 133 [2021-02-23 22:37:01,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:37:01,766 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 250 transitions. [2021-02-23 22:37:01,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-23 22:37:01,766 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 250 transitions. [2021-02-23 22:37:01,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-02-23 22:37:01,769 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:37:01,769 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:37:01,769 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-23 22:37:01,769 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:37:01,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:37:01,770 INFO L82 PathProgramCache]: Analyzing trace with hash 342744405, now seen corresponding path program 3 times [2021-02-23 22:37:01,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:37:01,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2076185184] [2021-02-23 22:37:01,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:37:01,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:01,799 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:01,800 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:01,800 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:01,801 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:01,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:37:01,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:01,828 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:01,828 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:01,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:37:01,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:01,831 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:01,832 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:01,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:37:01,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:01,855 WARN L141 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size [2021-02-23 22:37:01,855 WARN L147 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size 7 [2021-02-23 22:37:01,863 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:01,864 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:01,877 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:01,880 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:01,893 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:01,894 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:01,908 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.6 percent of original size [2021-02-23 22:37:01,909 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.6 percent of original size 28 [2021-02-23 22:37:01,939 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:01,940 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:37:01,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-02-23 22:37:01,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:01,955 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:01,956 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:01,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-02-23 22:37:01,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:01,959 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:01,960 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:01,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-02-23 22:37:01,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:01,963 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:01,964 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:01,986 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 7 proven. 44 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-02-23 22:37:01,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2076185184] [2021-02-23 22:37:01,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:37:01,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-02-23 22:37:01,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72307684] [2021-02-23 22:37:01,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-23 22:37:01,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:37:01,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-23 22:37:01,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-02-23 22:37:01,988 INFO L87 Difference]: Start difference. First operand 212 states and 250 transitions. Second operand 9 states. [2021-02-23 22:37:03,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:37:03,006 INFO L93 Difference]: Finished difference Result 384 states and 460 transitions. [2021-02-23 22:37:03,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-23 22:37:03,006 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 133 [2021-02-23 22:37:03,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:37:03,009 INFO L225 Difference]: With dead ends: 384 [2021-02-23 22:37:03,009 INFO L226 Difference]: Without dead ends: 248 [2021-02-23 22:37:03,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-02-23 22:37:03,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-02-23 22:37:03,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 212. [2021-02-23 22:37:03,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2021-02-23 22:37:03,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 250 transitions. [2021-02-23 22:37:03,054 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 250 transitions. Word has length 133 [2021-02-23 22:37:03,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:37:03,055 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 250 transitions. [2021-02-23 22:37:03,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-23 22:37:03,055 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 250 transitions. [2021-02-23 22:37:03,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-02-23 22:37:03,057 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:37:03,057 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:37:03,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-23 22:37:03,057 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:37:03,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:37:03,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1522143747, now seen corresponding path program 5 times [2021-02-23 22:37:03,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:37:03,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [825461315] [2021-02-23 22:37:03,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:37:03,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:03,084 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:03,085 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:03,085 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:03,085 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:03,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:37:03,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:03,111 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:03,111 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:03,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:37:03,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:03,114 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:03,114 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:03,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:37:03,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:03,130 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:03,131 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:03,132 WARN L141 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size [2021-02-23 22:37:03,132 WARN L147 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size 7 [2021-02-23 22:37:03,140 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:03,141 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:03,150 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:03,150 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:03,160 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:03,161 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:03,172 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:03,172 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:03,184 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:03,185 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:03,197 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:03,197 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:37:03,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-02-23 22:37:03,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:03,210 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:03,211 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:03,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-02-23 22:37:03,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:03,213 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:03,214 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:03,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-02-23 22:37:03,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:03,217 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:03,217 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:03,244 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 6 proven. 72 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-02-23 22:37:03,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [825461315] [2021-02-23 22:37:03,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:37:03,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-02-23 22:37:03,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848404932] [2021-02-23 22:37:03,245 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-23 22:37:03,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:37:03,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-23 22:37:03,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-02-23 22:37:03,246 INFO L87 Difference]: Start difference. First operand 212 states and 250 transitions. Second operand 10 states. [2021-02-23 22:37:04,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:37:04,344 INFO L93 Difference]: Finished difference Result 433 states and 515 transitions. [2021-02-23 22:37:04,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-23 22:37:04,345 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 138 [2021-02-23 22:37:04,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:37:04,347 INFO L225 Difference]: With dead ends: 433 [2021-02-23 22:37:04,347 INFO L226 Difference]: Without dead ends: 290 [2021-02-23 22:37:04,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=184, Unknown=0, NotChecked=0, Total=306 [2021-02-23 22:37:04,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-02-23 22:37:04,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 222. [2021-02-23 22:37:04,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2021-02-23 22:37:04,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 263 transitions. [2021-02-23 22:37:04,388 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 263 transitions. Word has length 138 [2021-02-23 22:37:04,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:37:04,388 INFO L480 AbstractCegarLoop]: Abstraction has 222 states and 263 transitions. [2021-02-23 22:37:04,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-23 22:37:04,389 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 263 transitions. [2021-02-23 22:37:04,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-02-23 22:37:04,391 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:37:04,391 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:37:04,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-02-23 22:37:04,391 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:37:04,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:37:04,392 INFO L82 PathProgramCache]: Analyzing trace with hash 762436271, now seen corresponding path program 4 times [2021-02-23 22:37:04,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:37:04,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1080040044] [2021-02-23 22:37:04,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:37:04,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:04,417 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:04,418 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:04,418 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:04,418 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:04,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:37:04,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:04,441 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:04,441 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:04,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:37:04,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:04,444 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:04,444 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:04,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:37:04,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:04,463 WARN L141 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size [2021-02-23 22:37:04,464 WARN L147 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size 7 [2021-02-23 22:37:04,470 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:04,471 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:04,482 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:04,482 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:04,495 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:04,495 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:04,509 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:04,510 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:04,525 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.6 percent of original size [2021-02-23 22:37:04,526 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.6 percent of original size 28 [2021-02-23 22:37:04,557 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:04,558 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:37:04,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-02-23 22:37:04,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:04,575 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:04,575 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:04,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-02-23 22:37:04,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:04,578 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:04,578 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:04,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-02-23 22:37:04,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:04,582 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:04,582 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:04,625 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 7 proven. 64 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-02-23 22:37:04,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1080040044] [2021-02-23 22:37:04,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:37:04,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-02-23 22:37:04,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166776153] [2021-02-23 22:37:04,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-23 22:37:04,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:37:04,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-23 22:37:04,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-02-23 22:37:04,628 INFO L87 Difference]: Start difference. First operand 222 states and 263 transitions. Second operand 10 states. [2021-02-23 22:37:05,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:37:05,831 INFO L93 Difference]: Finished difference Result 403 states and 485 transitions. [2021-02-23 22:37:05,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-23 22:37:05,835 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 138 [2021-02-23 22:37:05,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:37:05,837 INFO L225 Difference]: With dead ends: 403 [2021-02-23 22:37:05,838 INFO L226 Difference]: Without dead ends: 262 [2021-02-23 22:37:05,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2021-02-23 22:37:05,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-02-23 22:37:05,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 222. [2021-02-23 22:37:05,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2021-02-23 22:37:05,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 263 transitions. [2021-02-23 22:37:05,894 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 263 transitions. Word has length 138 [2021-02-23 22:37:05,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:37:05,894 INFO L480 AbstractCegarLoop]: Abstraction has 222 states and 263 transitions. [2021-02-23 22:37:05,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-23 22:37:05,894 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 263 transitions. [2021-02-23 22:37:05,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-02-23 22:37:05,897 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:37:05,897 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:37:05,897 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-02-23 22:37:05,897 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:37:05,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:37:05,898 INFO L82 PathProgramCache]: Analyzing trace with hash 164378851, now seen corresponding path program 6 times [2021-02-23 22:37:05,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:37:05,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1634990274] [2021-02-23 22:37:05,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:37:05,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:05,925 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:05,926 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:05,926 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:05,927 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:05,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:37:05,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:05,952 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:05,952 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:05,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:37:05,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:05,955 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:05,956 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:05,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:37:05,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:05,973 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:05,974 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:05,975 WARN L141 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size [2021-02-23 22:37:05,975 WARN L147 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size 7 [2021-02-23 22:37:05,983 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:05,983 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:05,991 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:05,992 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:06,002 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:06,003 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:06,013 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:06,014 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:06,026 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:06,027 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:06,039 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:06,040 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:06,054 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:06,054 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:37:06,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-02-23 22:37:06,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:06,071 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:06,072 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:06,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-02-23 22:37:06,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:06,075 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:06,075 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:06,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-02-23 22:37:06,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:06,080 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:06,080 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:06,113 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 6 proven. 99 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-02-23 22:37:06,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1634990274] [2021-02-23 22:37:06,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:37:06,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-02-23 22:37:06,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994627145] [2021-02-23 22:37:06,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-23 22:37:06,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:37:06,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-23 22:37:06,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-02-23 22:37:06,115 INFO L87 Difference]: Start difference. First operand 222 states and 263 transitions. Second operand 11 states. [2021-02-23 22:37:07,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:37:07,354 INFO L93 Difference]: Finished difference Result 460 states and 548 transitions. [2021-02-23 22:37:07,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-23 22:37:07,357 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 143 [2021-02-23 22:37:07,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:37:07,359 INFO L225 Difference]: With dead ends: 460 [2021-02-23 22:37:07,359 INFO L226 Difference]: Without dead ends: 312 [2021-02-23 22:37:07,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=151, Invalid=229, Unknown=0, NotChecked=0, Total=380 [2021-02-23 22:37:07,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-02-23 22:37:07,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 232. [2021-02-23 22:37:07,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2021-02-23 22:37:07,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 276 transitions. [2021-02-23 22:37:07,403 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 276 transitions. Word has length 143 [2021-02-23 22:37:07,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:37:07,403 INFO L480 AbstractCegarLoop]: Abstraction has 232 states and 276 transitions. [2021-02-23 22:37:07,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-23 22:37:07,403 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 276 transitions. [2021-02-23 22:37:07,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-02-23 22:37:07,405 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:37:07,405 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:37:07,406 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-02-23 22:37:07,406 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:37:07,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:37:07,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1846008427, now seen corresponding path program 5 times [2021-02-23 22:37:07,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:37:07,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41260880] [2021-02-23 22:37:07,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:37:07,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:07,434 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:07,435 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:07,435 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:07,436 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:07,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:37:07,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:07,459 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:07,459 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:07,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:37:07,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:07,462 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:07,463 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:07,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:37:07,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:07,484 WARN L141 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size [2021-02-23 22:37:07,485 WARN L147 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size 7 [2021-02-23 22:37:07,492 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:07,492 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:07,503 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:07,503 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:07,515 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:07,515 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:07,528 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:07,532 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:07,546 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:07,547 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:07,566 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.6 percent of original size [2021-02-23 22:37:07,568 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.6 percent of original size 28 [2021-02-23 22:37:07,601 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:07,601 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:37:07,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-02-23 22:37:07,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:07,619 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:07,621 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:07,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-02-23 22:37:07,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:07,625 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:07,625 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:07,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-02-23 22:37:07,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:07,629 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:07,629 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:07,657 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 7 proven. 89 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-02-23 22:37:07,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41260880] [2021-02-23 22:37:07,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:37:07,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-02-23 22:37:07,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381863825] [2021-02-23 22:37:07,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-23 22:37:07,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:37:07,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-23 22:37:07,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-02-23 22:37:07,659 INFO L87 Difference]: Start difference. First operand 232 states and 276 transitions. Second operand 11 states. [2021-02-23 22:37:09,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:37:09,034 INFO L93 Difference]: Finished difference Result 422 states and 510 transitions. [2021-02-23 22:37:09,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-23 22:37:09,035 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 143 [2021-02-23 22:37:09,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:37:09,037 INFO L225 Difference]: With dead ends: 422 [2021-02-23 22:37:09,037 INFO L226 Difference]: Without dead ends: 276 [2021-02-23 22:37:09,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2021-02-23 22:37:09,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-02-23 22:37:09,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 232. [2021-02-23 22:37:09,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2021-02-23 22:37:09,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 276 transitions. [2021-02-23 22:37:09,084 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 276 transitions. Word has length 143 [2021-02-23 22:37:09,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:37:09,084 INFO L480 AbstractCegarLoop]: Abstraction has 232 states and 276 transitions. [2021-02-23 22:37:09,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-23 22:37:09,084 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 276 transitions. [2021-02-23 22:37:09,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-02-23 22:37:09,086 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:37:09,086 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:37:09,086 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-02-23 22:37:09,087 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:37:09,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:37:09,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1478413757, now seen corresponding path program 7 times [2021-02-23 22:37:09,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:37:09,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645691512] [2021-02-23 22:37:09,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:37:09,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:09,112 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:09,113 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:09,113 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:09,113 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:09,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:37:09,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:09,137 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:09,138 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:09,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:37:09,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:09,140 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:09,140 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:09,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:37:09,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:09,157 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:09,158 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:09,159 WARN L141 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size [2021-02-23 22:37:09,159 WARN L147 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size 7 [2021-02-23 22:37:09,166 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:09,167 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:09,175 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:09,176 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:09,184 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:09,185 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:09,195 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:09,195 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:09,206 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:09,207 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:09,223 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:09,225 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:09,239 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:09,241 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:09,258 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:09,258 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:37:09,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-02-23 22:37:09,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:09,271 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:09,272 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:09,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-02-23 22:37:09,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:09,279 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:09,279 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:09,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-02-23 22:37:09,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:09,287 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:09,287 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:09,314 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 6 proven. 131 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-02-23 22:37:09,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645691512] [2021-02-23 22:37:09,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:37:09,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-02-23 22:37:09,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024981764] [2021-02-23 22:37:09,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-23 22:37:09,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:37:09,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-23 22:37:09,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-02-23 22:37:09,316 INFO L87 Difference]: Start difference. First operand 232 states and 276 transitions. Second operand 12 states. [2021-02-23 22:37:10,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:37:10,683 INFO L93 Difference]: Finished difference Result 487 states and 581 transitions. [2021-02-23 22:37:10,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-23 22:37:10,685 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 148 [2021-02-23 22:37:10,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:37:10,687 INFO L225 Difference]: With dead ends: 487 [2021-02-23 22:37:10,687 INFO L226 Difference]: Without dead ends: 334 [2021-02-23 22:37:10,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=183, Invalid=279, Unknown=0, NotChecked=0, Total=462 [2021-02-23 22:37:10,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-02-23 22:37:10,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 242. [2021-02-23 22:37:10,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2021-02-23 22:37:10,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 289 transitions. [2021-02-23 22:37:10,737 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 289 transitions. Word has length 148 [2021-02-23 22:37:10,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:37:10,738 INFO L480 AbstractCegarLoop]: Abstraction has 242 states and 289 transitions. [2021-02-23 22:37:10,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-23 22:37:10,738 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 289 transitions. [2021-02-23 22:37:10,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-02-23 22:37:10,739 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:37:10,740 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:37:10,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-02-23 22:37:10,740 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:37:10,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:37:10,741 INFO L82 PathProgramCache]: Analyzing trace with hash -531973521, now seen corresponding path program 6 times [2021-02-23 22:37:10,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:37:10,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040158494] [2021-02-23 22:37:10,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:37:10,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:10,766 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:10,767 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:10,767 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:10,768 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:10,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:37:10,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:10,792 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:10,793 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:10,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:37:10,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:10,795 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:10,796 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:10,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:37:10,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:10,830 WARN L141 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size [2021-02-23 22:37:10,830 WARN L147 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size 7 [2021-02-23 22:37:10,839 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:10,840 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:10,850 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:10,850 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:10,870 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:10,871 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:10,884 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:10,885 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:10,903 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:10,903 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:10,919 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:10,919 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:10,940 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.6 percent of original size [2021-02-23 22:37:10,944 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.6 percent of original size 28 [2021-02-23 22:37:10,982 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:10,982 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:37:11,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-02-23 22:37:11,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:11,003 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:11,003 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:11,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-02-23 22:37:11,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:11,007 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:11,007 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:11,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-02-23 22:37:11,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:11,010 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:11,011 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:11,042 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 7 proven. 119 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-02-23 22:37:11,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040158494] [2021-02-23 22:37:11,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:37:11,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-02-23 22:37:11,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165044493] [2021-02-23 22:37:11,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-23 22:37:11,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:37:11,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-23 22:37:11,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-02-23 22:37:11,045 INFO L87 Difference]: Start difference. First operand 242 states and 289 transitions. Second operand 12 states. [2021-02-23 22:37:12,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:37:12,681 INFO L93 Difference]: Finished difference Result 441 states and 535 transitions. [2021-02-23 22:37:12,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-23 22:37:12,682 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 148 [2021-02-23 22:37:12,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:37:12,684 INFO L225 Difference]: With dead ends: 441 [2021-02-23 22:37:12,684 INFO L226 Difference]: Without dead ends: 290 [2021-02-23 22:37:12,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2021-02-23 22:37:12,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-02-23 22:37:12,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 242. [2021-02-23 22:37:12,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2021-02-23 22:37:12,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 289 transitions. [2021-02-23 22:37:12,735 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 289 transitions. Word has length 148 [2021-02-23 22:37:12,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:37:12,735 INFO L480 AbstractCegarLoop]: Abstraction has 242 states and 289 transitions. [2021-02-23 22:37:12,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-23 22:37:12,735 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 289 transitions. [2021-02-23 22:37:12,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-02-23 22:37:12,737 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:37:12,737 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:37:12,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-02-23 22:37:12,737 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:37:12,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:37:12,738 INFO L82 PathProgramCache]: Analyzing trace with hash 776548643, now seen corresponding path program 8 times [2021-02-23 22:37:12,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:37:12,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [974488158] [2021-02-23 22:37:12,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:37:12,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:12,762 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:12,762 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:12,763 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:12,763 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:12,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:37:12,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:12,786 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:12,786 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:12,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:37:12,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:12,789 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:12,789 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:12,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:37:12,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:12,807 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:12,808 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:12,808 WARN L141 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size [2021-02-23 22:37:12,809 WARN L147 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size 7 [2021-02-23 22:37:12,816 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:12,817 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:12,824 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:12,825 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:12,834 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:12,834 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:12,844 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:12,844 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:12,856 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:12,857 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:12,869 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:12,870 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:12,886 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:12,887 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:12,904 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:12,906 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:12,925 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:12,925 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:37:12,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-02-23 22:37:12,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:12,940 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:12,941 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:12,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-02-23 22:37:12,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:12,944 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:12,944 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:12,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-02-23 22:37:12,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:12,947 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:12,947 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:12,981 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 6 proven. 168 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-02-23 22:37:12,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [974488158] [2021-02-23 22:37:12,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:37:12,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-02-23 22:37:12,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398881815] [2021-02-23 22:37:12,982 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-23 22:37:12,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:37:12,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-23 22:37:12,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-02-23 22:37:12,983 INFO L87 Difference]: Start difference. First operand 242 states and 289 transitions. Second operand 13 states. [2021-02-23 22:37:14,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:37:14,448 INFO L93 Difference]: Finished difference Result 514 states and 614 transitions. [2021-02-23 22:37:14,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-23 22:37:14,450 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 153 [2021-02-23 22:37:14,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:37:14,452 INFO L225 Difference]: With dead ends: 514 [2021-02-23 22:37:14,452 INFO L226 Difference]: Without dead ends: 356 [2021-02-23 22:37:14,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=218, Invalid=334, Unknown=0, NotChecked=0, Total=552 [2021-02-23 22:37:14,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-02-23 22:37:14,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 252. [2021-02-23 22:37:14,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2021-02-23 22:37:14,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 302 transitions. [2021-02-23 22:37:14,507 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 302 transitions. Word has length 153 [2021-02-23 22:37:14,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:37:14,508 INFO L480 AbstractCegarLoop]: Abstraction has 252 states and 302 transitions. [2021-02-23 22:37:14,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-02-23 22:37:14,508 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 302 transitions. [2021-02-23 22:37:14,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-02-23 22:37:14,510 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:37:14,510 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:37:14,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-02-23 22:37:14,510 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:37:14,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:37:14,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1233838635, now seen corresponding path program 7 times [2021-02-23 22:37:14,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:37:14,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [373162049] [2021-02-23 22:37:14,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:37:14,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:14,537 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:14,540 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:14,541 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:14,541 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:14,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:37:14,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:14,563 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:14,564 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:14,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:37:14,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:14,567 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:14,567 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:14,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:37:14,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:14,594 WARN L141 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size [2021-02-23 22:37:14,595 WARN L147 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size 7 [2021-02-23 22:37:14,602 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:14,602 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:14,613 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:14,613 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:14,626 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:14,626 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:14,639 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:14,639 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:14,663 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:14,664 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:14,684 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:14,685 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:14,704 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:14,705 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:14,729 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.6 percent of original size [2021-02-23 22:37:14,730 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.6 percent of original size 28 [2021-02-23 22:37:14,773 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:14,774 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:37:14,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-02-23 22:37:14,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:14,797 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:14,797 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:14,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-02-23 22:37:14,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:14,800 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:14,800 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:14,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-02-23 22:37:14,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:14,803 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:14,804 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:14,840 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 7 proven. 154 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-02-23 22:37:14,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [373162049] [2021-02-23 22:37:14,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:37:14,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-02-23 22:37:14,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486425569] [2021-02-23 22:37:14,841 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-23 22:37:14,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:37:14,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-23 22:37:14,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-02-23 22:37:14,842 INFO L87 Difference]: Start difference. First operand 252 states and 302 transitions. Second operand 13 states. [2021-02-23 22:37:16,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:37:16,755 INFO L93 Difference]: Finished difference Result 460 states and 560 transitions. [2021-02-23 22:37:16,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-23 22:37:16,756 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 153 [2021-02-23 22:37:16,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:37:16,758 INFO L225 Difference]: With dead ends: 460 [2021-02-23 22:37:16,758 INFO L226 Difference]: Without dead ends: 304 [2021-02-23 22:37:16,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-02-23 22:37:16,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-02-23 22:37:16,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 252. [2021-02-23 22:37:16,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2021-02-23 22:37:16,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 302 transitions. [2021-02-23 22:37:16,812 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 302 transitions. Word has length 153 [2021-02-23 22:37:16,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:37:16,813 INFO L480 AbstractCegarLoop]: Abstraction has 252 states and 302 transitions. [2021-02-23 22:37:16,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-02-23 22:37:16,813 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 302 transitions. [2021-02-23 22:37:16,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-02-23 22:37:16,814 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:37:16,815 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:37:16,815 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-02-23 22:37:16,815 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:37:16,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:37:16,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1077083517, now seen corresponding path program 9 times [2021-02-23 22:37:16,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:37:16,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1715182813] [2021-02-23 22:37:16,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:37:16,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:16,841 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:16,842 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:16,842 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:16,843 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:16,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:37:16,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:16,871 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:16,871 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:16,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:37:16,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:16,873 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:16,874 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:16,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:37:16,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:16,894 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:16,895 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:16,895 WARN L141 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size [2021-02-23 22:37:16,896 WARN L147 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size 7 [2021-02-23 22:37:16,902 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:16,903 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:16,911 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:16,914 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:16,923 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:16,923 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:16,934 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:16,934 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:16,945 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:16,946 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:16,958 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:16,958 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:16,972 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:16,973 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:16,987 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:16,987 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:17,002 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:17,003 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:17,019 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:17,020 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:37:17,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-02-23 22:37:17,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:17,034 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:17,034 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:17,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-02-23 22:37:17,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:17,037 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:17,038 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:17,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-02-23 22:37:17,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:17,045 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:17,045 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:17,072 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 6 proven. 210 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-02-23 22:37:17,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1715182813] [2021-02-23 22:37:17,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:37:17,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-02-23 22:37:17,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181514519] [2021-02-23 22:37:17,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-23 22:37:17,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:37:17,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-23 22:37:17,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2021-02-23 22:37:17,073 INFO L87 Difference]: Start difference. First operand 252 states and 302 transitions. Second operand 14 states. [2021-02-23 22:37:18,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:37:18,696 INFO L93 Difference]: Finished difference Result 541 states and 647 transitions. [2021-02-23 22:37:18,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-23 22:37:18,697 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 158 [2021-02-23 22:37:18,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:37:18,700 INFO L225 Difference]: With dead ends: 541 [2021-02-23 22:37:18,700 INFO L226 Difference]: Without dead ends: 378 [2021-02-23 22:37:18,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=256, Invalid=394, Unknown=0, NotChecked=0, Total=650 [2021-02-23 22:37:18,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-02-23 22:37:18,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 262. [2021-02-23 22:37:18,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2021-02-23 22:37:18,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 315 transitions. [2021-02-23 22:37:18,760 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 315 transitions. Word has length 158 [2021-02-23 22:37:18,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:37:18,761 INFO L480 AbstractCegarLoop]: Abstraction has 262 states and 315 transitions. [2021-02-23 22:37:18,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-02-23 22:37:18,761 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 315 transitions. [2021-02-23 22:37:18,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-02-23 22:37:18,762 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:37:18,763 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:37:18,763 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-02-23 22:37:18,763 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:37:18,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:37:18,763 INFO L82 PathProgramCache]: Analyzing trace with hash -933303761, now seen corresponding path program 8 times [2021-02-23 22:37:18,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:37:18,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1671592969] [2021-02-23 22:37:18,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:37:18,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:18,818 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:18,818 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:18,819 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:18,819 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:18,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:37:18,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:18,842 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:18,842 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:18,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:37:18,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:18,845 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:18,846 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:18,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:37:18,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:18,883 WARN L141 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size [2021-02-23 22:37:18,883 WARN L147 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size 7 [2021-02-23 22:37:18,890 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:18,890 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:18,901 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:18,902 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:18,914 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:18,915 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:18,927 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:18,928 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:18,942 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:18,943 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:18,958 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:18,959 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:18,976 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:18,976 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:18,994 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:18,994 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:19,017 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.6 percent of original size [2021-02-23 22:37:19,018 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.6 percent of original size 28 [2021-02-23 22:37:19,060 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:19,061 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:37:19,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-02-23 22:37:19,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:19,093 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:19,094 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:19,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-02-23 22:37:19,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:19,098 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:19,099 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:19,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-02-23 22:37:19,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:19,106 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:19,106 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:19,147 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 7 proven. 194 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-02-23 22:37:19,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1671592969] [2021-02-23 22:37:19,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:37:19,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-02-23 22:37:19,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907752474] [2021-02-23 22:37:19,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-23 22:37:19,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:37:19,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-23 22:37:19,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-02-23 22:37:19,149 INFO L87 Difference]: Start difference. First operand 262 states and 315 transitions. Second operand 14 states. [2021-02-23 22:37:21,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:37:21,305 INFO L93 Difference]: Finished difference Result 479 states and 585 transitions. [2021-02-23 22:37:21,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-23 22:37:21,308 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 158 [2021-02-23 22:37:21,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:37:21,310 INFO L225 Difference]: With dead ends: 479 [2021-02-23 22:37:21,311 INFO L226 Difference]: Without dead ends: 318 [2021-02-23 22:37:21,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2021-02-23 22:37:21,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-02-23 22:37:21,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 262. [2021-02-23 22:37:21,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2021-02-23 22:37:21,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 315 transitions. [2021-02-23 22:37:21,379 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 315 transitions. Word has length 158 [2021-02-23 22:37:21,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:37:21,379 INFO L480 AbstractCegarLoop]: Abstraction has 262 states and 315 transitions. [2021-02-23 22:37:21,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-02-23 22:37:21,379 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 315 transitions. [2021-02-23 22:37:21,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-02-23 22:37:21,381 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:37:21,381 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:37:21,381 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-02-23 22:37:21,381 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:37:21,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:37:21,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1373841053, now seen corresponding path program 10 times [2021-02-23 22:37:21,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:37:21,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [612824399] [2021-02-23 22:37:21,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:37:21,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:21,408 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:21,408 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:21,409 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:21,409 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:21,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:37:21,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:21,432 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:21,433 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:21,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:37:21,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:21,435 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:21,435 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:21,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:37:21,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:21,455 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:21,455 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:21,456 WARN L141 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size [2021-02-23 22:37:21,457 WARN L147 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size 7 [2021-02-23 22:37:21,463 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:21,464 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:21,472 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:21,472 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:21,481 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:21,481 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:21,491 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:21,492 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:21,503 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:21,503 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:21,515 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:21,516 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:21,529 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:21,530 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:21,543 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:21,544 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:21,559 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:21,559 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:21,579 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:21,580 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:21,601 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:21,602 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:37:21,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-02-23 22:37:21,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:21,623 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:21,623 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:21,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-02-23 22:37:21,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:21,626 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:21,627 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:21,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-02-23 22:37:21,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:21,630 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:21,631 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:21,671 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 6 proven. 257 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-02-23 22:37:21,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [612824399] [2021-02-23 22:37:21,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:37:21,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-02-23 22:37:21,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701247432] [2021-02-23 22:37:21,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-23 22:37:21,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:37:21,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-23 22:37:21,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-02-23 22:37:21,673 INFO L87 Difference]: Start difference. First operand 262 states and 315 transitions. Second operand 15 states. [2021-02-23 22:37:23,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:37:23,560 INFO L93 Difference]: Finished difference Result 568 states and 680 transitions. [2021-02-23 22:37:23,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-23 22:37:23,560 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 163 [2021-02-23 22:37:23,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:37:23,563 INFO L225 Difference]: With dead ends: 568 [2021-02-23 22:37:23,563 INFO L226 Difference]: Without dead ends: 400 [2021-02-23 22:37:23,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=297, Invalid=459, Unknown=0, NotChecked=0, Total=756 [2021-02-23 22:37:23,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-02-23 22:37:23,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 272. [2021-02-23 22:37:23,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2021-02-23 22:37:23,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 328 transitions. [2021-02-23 22:37:23,628 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 328 transitions. Word has length 163 [2021-02-23 22:37:23,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:37:23,628 INFO L480 AbstractCegarLoop]: Abstraction has 272 states and 328 transitions. [2021-02-23 22:37:23,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-02-23 22:37:23,628 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 328 transitions. [2021-02-23 22:37:23,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-02-23 22:37:23,630 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:37:23,630 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:37:23,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-02-23 22:37:23,631 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:37:23,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:37:23,631 INFO L82 PathProgramCache]: Analyzing trace with hash 910738965, now seen corresponding path program 9 times [2021-02-23 22:37:23,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:37:23,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807112673] [2021-02-23 22:37:23,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:37:23,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:23,676 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:23,677 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:23,677 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:23,677 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:23,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:37:23,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:23,701 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:23,701 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:23,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:37:23,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:23,703 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:23,704 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:23,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:37:23,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:23,741 WARN L141 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size [2021-02-23 22:37:23,741 WARN L147 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size 7 [2021-02-23 22:37:23,748 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:23,749 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:23,759 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:23,760 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:23,771 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:23,772 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:23,788 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:23,788 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:23,806 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:23,807 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:23,824 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:23,825 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:23,846 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:23,846 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:23,868 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:23,869 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:23,892 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:23,893 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:23,919 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.6 percent of original size [2021-02-23 22:37:23,920 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.6 percent of original size 28 [2021-02-23 22:37:23,967 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:23,967 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:37:23,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-02-23 22:37:23,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:23,999 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:23,999 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:23,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-02-23 22:37:24,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:24,009 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:24,010 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:24,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-02-23 22:37:24,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:24,013 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:24,013 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:24,047 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 7 proven. 239 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-02-23 22:37:24,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807112673] [2021-02-23 22:37:24,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:37:24,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-02-23 22:37:24,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675542989] [2021-02-23 22:37:24,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-23 22:37:24,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:37:24,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-23 22:37:24,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-02-23 22:37:24,049 INFO L87 Difference]: Start difference. First operand 272 states and 328 transitions. Second operand 15 states. [2021-02-23 22:37:26,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:37:26,204 INFO L93 Difference]: Finished difference Result 498 states and 610 transitions. [2021-02-23 22:37:26,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-23 22:37:26,205 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 163 [2021-02-23 22:37:26,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:37:26,211 INFO L225 Difference]: With dead ends: 498 [2021-02-23 22:37:26,212 INFO L226 Difference]: Without dead ends: 332 [2021-02-23 22:37:26,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2021-02-23 22:37:26,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-02-23 22:37:26,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 272. [2021-02-23 22:37:26,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2021-02-23 22:37:26,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 328 transitions. [2021-02-23 22:37:26,278 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 328 transitions. Word has length 163 [2021-02-23 22:37:26,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:37:26,278 INFO L480 AbstractCegarLoop]: Abstraction has 272 states and 328 transitions. [2021-02-23 22:37:26,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-02-23 22:37:26,278 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 328 transitions. [2021-02-23 22:37:26,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-02-23 22:37:26,280 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:37:26,280 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:37:26,280 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-02-23 22:37:26,280 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:37:26,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:37:26,281 INFO L82 PathProgramCache]: Analyzing trace with hash -945914563, now seen corresponding path program 11 times [2021-02-23 22:37:26,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:37:26,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1755463682] [2021-02-23 22:37:26,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:37:26,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:26,322 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:26,323 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:26,323 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:26,324 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:26,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:37:26,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:26,356 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:26,356 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:26,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:37:26,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:26,359 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:26,359 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:26,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:37:26,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:26,394 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:26,395 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:26,396 WARN L141 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size [2021-02-23 22:37:26,396 WARN L147 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size 7 [2021-02-23 22:37:26,403 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:26,403 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:26,411 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:26,411 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:26,420 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:26,421 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:26,431 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:26,432 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:26,444 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:26,445 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:26,458 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:26,459 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:26,473 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:26,474 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:26,490 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:26,490 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:26,506 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:26,506 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:26,523 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:26,524 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:26,542 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:26,543 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:26,562 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:26,563 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:37:26,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-02-23 22:37:26,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:26,585 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:26,585 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:26,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-02-23 22:37:26,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:26,588 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:26,589 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:26,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-02-23 22:37:26,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:26,592 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:26,592 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:26,641 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 6 proven. 309 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-02-23 22:37:26,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1755463682] [2021-02-23 22:37:26,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:37:26,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-02-23 22:37:26,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645963118] [2021-02-23 22:37:26,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-23 22:37:26,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:37:26,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-23 22:37:26,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=134, Unknown=0, NotChecked=0, Total=240 [2021-02-23 22:37:26,643 INFO L87 Difference]: Start difference. First operand 272 states and 328 transitions. Second operand 16 states. [2021-02-23 22:37:28,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:37:28,678 INFO L93 Difference]: Finished difference Result 595 states and 713 transitions. [2021-02-23 22:37:28,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-23 22:37:28,679 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 168 [2021-02-23 22:37:28,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:37:28,682 INFO L225 Difference]: With dead ends: 595 [2021-02-23 22:37:28,682 INFO L226 Difference]: Without dead ends: 422 [2021-02-23 22:37:28,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=341, Invalid=529, Unknown=0, NotChecked=0, Total=870 [2021-02-23 22:37:28,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-02-23 22:37:28,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 282. [2021-02-23 22:37:28,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2021-02-23 22:37:28,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 341 transitions. [2021-02-23 22:37:28,762 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 341 transitions. Word has length 168 [2021-02-23 22:37:28,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:37:28,762 INFO L480 AbstractCegarLoop]: Abstraction has 282 states and 341 transitions. [2021-02-23 22:37:28,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-02-23 22:37:28,762 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 341 transitions. [2021-02-23 22:37:28,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-02-23 22:37:28,764 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:37:28,764 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:37:28,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-02-23 22:37:28,765 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:37:28,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:37:28,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1338665455, now seen corresponding path program 10 times [2021-02-23 22:37:28,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:37:28,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1678759510] [2021-02-23 22:37:28,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:37:28,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:28,802 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:28,802 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:28,803 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:28,803 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:28,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:37:28,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:28,826 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:28,826 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:28,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:37:28,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:28,829 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:28,830 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:28,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:37:28,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:28,859 WARN L141 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size [2021-02-23 22:37:28,860 WARN L147 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size 7 [2021-02-23 22:37:28,867 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:28,867 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:28,878 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:28,879 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:28,891 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:28,892 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:28,905 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:28,906 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:28,921 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:28,921 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:28,937 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:28,937 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:28,956 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:28,957 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:28,976 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:28,976 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:28,997 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:28,998 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:29,019 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:29,020 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:29,042 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.6 percent of original size [2021-02-23 22:37:29,043 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.6 percent of original size 28 [2021-02-23 22:37:29,090 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:29,091 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:37:29,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-02-23 22:37:29,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:29,126 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:29,127 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:29,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-02-23 22:37:29,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:29,129 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:29,129 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:29,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-02-23 22:37:29,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:29,132 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:29,132 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:29,185 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 7 proven. 289 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-02-23 22:37:29,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1678759510] [2021-02-23 22:37:29,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:37:29,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-02-23 22:37:29,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214125320] [2021-02-23 22:37:29,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-23 22:37:29,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:37:29,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-23 22:37:29,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-02-23 22:37:29,188 INFO L87 Difference]: Start difference. First operand 282 states and 341 transitions. Second operand 16 states. [2021-02-23 22:37:31,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:37:31,481 INFO L93 Difference]: Finished difference Result 517 states and 635 transitions. [2021-02-23 22:37:31,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-23 22:37:31,482 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 168 [2021-02-23 22:37:31,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:37:31,483 INFO L225 Difference]: With dead ends: 517 [2021-02-23 22:37:31,483 INFO L226 Difference]: Without dead ends: 346 [2021-02-23 22:37:31,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2021-02-23 22:37:31,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-02-23 22:37:31,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 282. [2021-02-23 22:37:31,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2021-02-23 22:37:31,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 341 transitions. [2021-02-23 22:37:31,554 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 341 transitions. Word has length 168 [2021-02-23 22:37:31,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:37:31,555 INFO L480 AbstractCegarLoop]: Abstraction has 282 states and 341 transitions. [2021-02-23 22:37:31,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-02-23 22:37:31,555 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 341 transitions. [2021-02-23 22:37:31,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-02-23 22:37:31,557 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:37:31,557 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:37:31,557 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-02-23 22:37:31,558 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:37:31,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:37:31,558 INFO L82 PathProgramCache]: Analyzing trace with hash 279654819, now seen corresponding path program 12 times [2021-02-23 22:37:31,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:37:31,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [136248572] [2021-02-23 22:37:31,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:37:31,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:31,588 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:31,589 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:31,589 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:31,590 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:31,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:37:31,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:31,612 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:31,612 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:31,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:37:31,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:31,614 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:31,614 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:31,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:37:31,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:31,640 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:31,641 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:31,641 WARN L141 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size [2021-02-23 22:37:31,642 WARN L147 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size 7 [2021-02-23 22:37:31,648 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:31,649 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:31,657 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:31,657 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:31,665 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:31,666 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:31,675 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:31,676 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:31,687 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:31,688 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:31,699 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:31,700 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:31,713 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:31,713 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:31,727 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:31,728 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:31,745 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:31,745 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:31,763 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:31,764 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:31,782 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:31,782 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:31,802 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:31,802 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:31,821 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:31,821 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:37:31,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-02-23 22:37:31,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:31,843 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:31,843 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:31,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-02-23 22:37:31,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:31,845 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:31,846 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:31,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-02-23 22:37:31,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:31,848 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:31,849 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:31,896 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 6 proven. 366 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-02-23 22:37:31,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [136248572] [2021-02-23 22:37:31,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:37:31,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-02-23 22:37:31,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72544099] [2021-02-23 22:37:31,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-23 22:37:31,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:37:31,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-23 22:37:31,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=151, Unknown=0, NotChecked=0, Total=272 [2021-02-23 22:37:31,899 INFO L87 Difference]: Start difference. First operand 282 states and 341 transitions. Second operand 17 states. [2021-02-23 22:37:34,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:37:34,145 INFO L93 Difference]: Finished difference Result 622 states and 746 transitions. [2021-02-23 22:37:34,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-23 22:37:34,146 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 173 [2021-02-23 22:37:34,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:37:34,149 INFO L225 Difference]: With dead ends: 622 [2021-02-23 22:37:34,149 INFO L226 Difference]: Without dead ends: 444 [2021-02-23 22:37:34,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=388, Invalid=604, Unknown=0, NotChecked=0, Total=992 [2021-02-23 22:37:34,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-02-23 22:37:34,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 292. [2021-02-23 22:37:34,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2021-02-23 22:37:34,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 354 transitions. [2021-02-23 22:37:34,225 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 354 transitions. Word has length 173 [2021-02-23 22:37:34,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:37:34,225 INFO L480 AbstractCegarLoop]: Abstraction has 292 states and 354 transitions. [2021-02-23 22:37:34,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-02-23 22:37:34,226 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 354 transitions. [2021-02-23 22:37:34,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-02-23 22:37:34,227 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:37:34,228 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:37:34,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-02-23 22:37:34,228 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:37:34,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:37:34,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1730732459, now seen corresponding path program 11 times [2021-02-23 22:37:34,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:37:34,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [384078532] [2021-02-23 22:37:34,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:37:34,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:34,261 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:34,262 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:34,262 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:34,262 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:34,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:37:34,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:34,285 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:34,286 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:34,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:37:34,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:34,288 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:34,288 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:34,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:37:34,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:34,320 WARN L141 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size [2021-02-23 22:37:34,321 WARN L147 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size 7 [2021-02-23 22:37:34,327 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:34,328 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:34,339 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:34,339 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:34,351 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:34,352 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:34,365 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:34,366 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:34,380 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:34,381 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:34,396 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:34,397 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:34,414 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:34,415 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:34,433 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:34,433 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:34,453 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:34,453 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:34,472 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:34,473 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:34,500 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:34,501 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:34,529 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.6 percent of original size [2021-02-23 22:37:34,530 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.6 percent of original size 28 [2021-02-23 22:37:34,586 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:34,587 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:37:34,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-02-23 22:37:34,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:34,624 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:34,625 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:34,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-02-23 22:37:34,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:34,632 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:34,637 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:34,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-02-23 22:37:34,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:34,640 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:34,641 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:34,705 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 7 proven. 344 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-02-23 22:37:34,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [384078532] [2021-02-23 22:37:34,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:37:34,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-02-23 22:37:34,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663913234] [2021-02-23 22:37:34,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-23 22:37:34,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:37:34,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-23 22:37:34,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-02-23 22:37:34,707 INFO L87 Difference]: Start difference. First operand 292 states and 354 transitions. Second operand 17 states. [2021-02-23 22:37:37,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:37:37,750 INFO L93 Difference]: Finished difference Result 536 states and 660 transitions. [2021-02-23 22:37:37,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-23 22:37:37,750 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 173 [2021-02-23 22:37:37,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:37:37,752 INFO L225 Difference]: With dead ends: 536 [2021-02-23 22:37:37,753 INFO L226 Difference]: Without dead ends: 360 [2021-02-23 22:37:37,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=190, Invalid=802, Unknown=0, NotChecked=0, Total=992 [2021-02-23 22:37:37,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-02-23 22:37:37,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 292. [2021-02-23 22:37:37,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2021-02-23 22:37:37,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 354 transitions. [2021-02-23 22:37:37,836 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 354 transitions. Word has length 173 [2021-02-23 22:37:37,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:37:37,837 INFO L480 AbstractCegarLoop]: Abstraction has 292 states and 354 transitions. [2021-02-23 22:37:37,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-02-23 22:37:37,837 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 354 transitions. [2021-02-23 22:37:37,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-02-23 22:37:37,839 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:37:37,839 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:37:37,839 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-02-23 22:37:37,839 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:37:37,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:37:37,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1702710525, now seen corresponding path program 13 times [2021-02-23 22:37:37,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:37:37,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522265063] [2021-02-23 22:37:37,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:37:37,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:37,869 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:37,870 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:37,870 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:37,871 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:37,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:37:37,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:37,894 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:37,895 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:37,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:37:37,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:37,897 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:37,897 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:37,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:37:37,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:37,922 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:37,923 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:37,923 WARN L141 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size [2021-02-23 22:37:37,924 WARN L147 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size 7 [2021-02-23 22:37:37,931 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:37,931 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:37,939 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:37,939 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:37,948 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:37,949 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:37,958 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:37,959 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:37,970 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:37,970 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:37,983 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:37,983 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:37,996 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:37,997 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:38,011 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:38,011 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:38,027 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:38,027 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:38,045 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:38,046 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:38,067 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:38,068 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:38,091 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:38,092 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:38,117 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:38,118 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:38,142 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:38,142 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:37:38,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-02-23 22:37:38,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:38,164 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:38,164 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:38,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-02-23 22:37:38,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:38,167 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:38,167 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:38,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-02-23 22:37:38,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:38,172 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:38,172 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:38,226 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 6 proven. 428 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-02-23 22:37:38,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522265063] [2021-02-23 22:37:38,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:37:38,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-02-23 22:37:38,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712237038] [2021-02-23 22:37:38,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-23 22:37:38,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:37:38,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-23 22:37:38,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=169, Unknown=0, NotChecked=0, Total=306 [2021-02-23 22:37:38,228 INFO L87 Difference]: Start difference. First operand 292 states and 354 transitions. Second operand 18 states. [2021-02-23 22:37:40,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:37:40,638 INFO L93 Difference]: Finished difference Result 649 states and 779 transitions. [2021-02-23 22:37:40,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-23 22:37:40,639 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 178 [2021-02-23 22:37:40,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:37:40,643 INFO L225 Difference]: With dead ends: 649 [2021-02-23 22:37:40,643 INFO L226 Difference]: Without dead ends: 466 [2021-02-23 22:37:40,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=438, Invalid=684, Unknown=0, NotChecked=0, Total=1122 [2021-02-23 22:37:40,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-02-23 22:37:40,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 302. [2021-02-23 22:37:40,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2021-02-23 22:37:40,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 367 transitions. [2021-02-23 22:37:40,733 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 367 transitions. Word has length 178 [2021-02-23 22:37:40,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:37:40,733 INFO L480 AbstractCegarLoop]: Abstraction has 302 states and 367 transitions. [2021-02-23 22:37:40,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-02-23 22:37:40,733 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 367 transitions. [2021-02-23 22:37:40,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-02-23 22:37:40,735 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:37:40,735 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:37:40,735 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-02-23 22:37:40,736 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:37:40,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:37:40,736 INFO L82 PathProgramCache]: Analyzing trace with hash -307676753, now seen corresponding path program 12 times [2021-02-23 22:37:40,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:37:40,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443746684] [2021-02-23 22:37:40,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:37:40,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:40,771 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:40,771 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:40,772 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:40,772 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:40,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:37:40,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:40,794 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:40,795 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:40,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:37:40,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:40,797 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:40,797 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:40,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:37:40,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:40,832 WARN L141 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size [2021-02-23 22:37:40,833 WARN L147 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size 7 [2021-02-23 22:37:40,841 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:40,841 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:40,852 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:40,853 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:40,867 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:40,867 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:40,880 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:40,881 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:40,895 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:40,896 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:40,912 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:40,913 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:40,929 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:40,930 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:40,948 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:40,949 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:40,969 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:40,969 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:40,995 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:40,995 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:41,017 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:41,018 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:41,042 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:41,042 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:41,067 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.6 percent of original size [2021-02-23 22:37:41,067 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.6 percent of original size 28 [2021-02-23 22:37:41,115 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:41,115 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:37:41,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-02-23 22:37:41,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:41,153 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:41,153 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:41,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-02-23 22:37:41,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:41,156 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:41,156 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:41,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-02-23 22:37:41,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:41,159 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:41,160 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:41,210 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 7 proven. 404 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-02-23 22:37:41,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443746684] [2021-02-23 22:37:41,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:37:41,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-02-23 22:37:41,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856165539] [2021-02-23 22:37:41,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-23 22:37:41,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:37:41,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-23 22:37:41,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-02-23 22:37:41,211 INFO L87 Difference]: Start difference. First operand 302 states and 367 transitions. Second operand 18 states. [2021-02-23 22:37:44,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:37:44,034 INFO L93 Difference]: Finished difference Result 555 states and 685 transitions. [2021-02-23 22:37:44,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-23 22:37:44,034 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 178 [2021-02-23 22:37:44,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:37:44,037 INFO L225 Difference]: With dead ends: 555 [2021-02-23 22:37:44,037 INFO L226 Difference]: Without dead ends: 374 [2021-02-23 22:37:44,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2021-02-23 22:37:44,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-02-23 22:37:44,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 302. [2021-02-23 22:37:44,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2021-02-23 22:37:44,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 367 transitions. [2021-02-23 22:37:44,119 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 367 transitions. Word has length 178 [2021-02-23 22:37:44,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:37:44,119 INFO L480 AbstractCegarLoop]: Abstraction has 302 states and 367 transitions. [2021-02-23 22:37:44,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-02-23 22:37:44,120 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 367 transitions. [2021-02-23 22:37:44,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-02-23 22:37:44,121 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:37:44,121 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:37:44,122 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-02-23 22:37:44,122 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:37:44,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:37:44,122 INFO L82 PathProgramCache]: Analyzing trace with hash -262653469, now seen corresponding path program 14 times [2021-02-23 22:37:44,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:37:44,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998196226] [2021-02-23 22:37:44,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:37:44,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:44,151 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:44,151 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:44,152 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:44,152 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:44,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:37:44,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:44,174 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:44,174 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:44,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:37:44,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:44,176 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:44,176 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:44,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:37:44,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:44,201 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:44,201 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:44,202 WARN L141 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size [2021-02-23 22:37:44,202 WARN L147 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size 7 [2021-02-23 22:37:44,209 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:44,210 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:44,218 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:44,218 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:44,227 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:44,227 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:44,237 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:44,237 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:44,248 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:44,249 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:44,261 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:44,261 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:44,274 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:44,275 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:44,289 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:44,290 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:44,306 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:44,307 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:44,327 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:44,328 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:44,350 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:44,350 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:44,372 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:44,373 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:44,398 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:44,398 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:44,424 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:44,427 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:44,453 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:44,453 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:37:44,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-02-23 22:37:44,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:44,475 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:44,475 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:44,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-02-23 22:37:44,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:44,478 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:44,478 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:44,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-02-23 22:37:44,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:44,481 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:44,482 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:44,522 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 6 proven. 495 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-02-23 22:37:44,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998196226] [2021-02-23 22:37:44,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:37:44,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-02-23 22:37:44,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810238108] [2021-02-23 22:37:44,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-23 22:37:44,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:37:44,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-23 22:37:44,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=188, Unknown=0, NotChecked=0, Total=342 [2021-02-23 22:37:44,523 INFO L87 Difference]: Start difference. First operand 302 states and 367 transitions. Second operand 19 states. [2021-02-23 22:37:46,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:37:46,220 INFO L93 Difference]: Finished difference Result 676 states and 812 transitions. [2021-02-23 22:37:46,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-23 22:37:46,222 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 183 [2021-02-23 22:37:46,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:37:46,227 INFO L225 Difference]: With dead ends: 676 [2021-02-23 22:37:46,227 INFO L226 Difference]: Without dead ends: 488 [2021-02-23 22:37:46,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=491, Invalid=769, Unknown=0, NotChecked=0, Total=1260 [2021-02-23 22:37:46,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-02-23 22:37:46,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 312. [2021-02-23 22:37:46,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2021-02-23 22:37:46,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 380 transitions. [2021-02-23 22:37:46,308 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 380 transitions. Word has length 183 [2021-02-23 22:37:46,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:37:46,308 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 380 transitions. [2021-02-23 22:37:46,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-02-23 22:37:46,308 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 380 transitions. [2021-02-23 22:37:46,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-02-23 22:37:46,310 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:37:46,310 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:37:46,310 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-02-23 22:37:46,310 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:37:46,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:37:46,311 INFO L82 PathProgramCache]: Analyzing trace with hash 2021926549, now seen corresponding path program 13 times [2021-02-23 22:37:46,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:37:46,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383159335] [2021-02-23 22:37:46,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:37:46,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:46,347 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:46,348 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:46,348 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:46,349 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:46,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:37:46,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:46,371 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:46,371 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:46,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:37:46,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:46,373 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:46,374 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:46,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:37:46,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:46,408 WARN L141 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size [2021-02-23 22:37:46,408 WARN L147 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size 7 [2021-02-23 22:37:46,415 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:46,415 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:46,426 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:46,426 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:46,438 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:46,438 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:46,451 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:46,451 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:46,465 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:46,466 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:46,482 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:46,483 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:46,500 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:46,500 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:46,518 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:46,518 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:46,538 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:46,538 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:46,564 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:46,564 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:46,592 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:46,595 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:46,621 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:46,621 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:46,651 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:46,652 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:46,684 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.6 percent of original size [2021-02-23 22:37:46,684 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.6 percent of original size 28 [2021-02-23 22:37:46,743 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:46,746 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:37:46,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-02-23 22:37:46,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:46,788 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:46,788 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:46,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-02-23 22:37:46,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:46,791 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:46,791 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:46,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-02-23 22:37:46,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:46,796 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:46,796 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:46,871 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 7 proven. 469 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-02-23 22:37:46,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383159335] [2021-02-23 22:37:46,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:37:46,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-02-23 22:37:46,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634009350] [2021-02-23 22:37:46,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-23 22:37:46,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:37:46,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-23 22:37:46,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-02-23 22:37:46,874 INFO L87 Difference]: Start difference. First operand 312 states and 380 transitions. Second operand 19 states. [2021-02-23 22:37:50,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:37:50,034 INFO L93 Difference]: Finished difference Result 574 states and 710 transitions. [2021-02-23 22:37:50,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-23 22:37:50,034 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 183 [2021-02-23 22:37:50,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:37:50,036 INFO L225 Difference]: With dead ends: 574 [2021-02-23 22:37:50,036 INFO L226 Difference]: Without dead ends: 388 [2021-02-23 22:37:50,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=218, Invalid=1042, Unknown=0, NotChecked=0, Total=1260 [2021-02-23 22:37:50,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-02-23 22:37:50,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 312. [2021-02-23 22:37:50,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2021-02-23 22:37:50,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 380 transitions. [2021-02-23 22:37:50,126 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 380 transitions. Word has length 183 [2021-02-23 22:37:50,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:37:50,126 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 380 transitions. [2021-02-23 22:37:50,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-02-23 22:37:50,127 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 380 transitions. [2021-02-23 22:37:50,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-02-23 22:37:50,128 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:37:50,128 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:37:50,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-02-23 22:37:50,129 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:37:50,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:37:50,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1575709885, now seen corresponding path program 15 times [2021-02-23 22:37:50,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:37:50,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1062225711] [2021-02-23 22:37:50,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:37:50,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:50,160 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:50,160 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:50,161 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:50,161 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:50,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:37:50,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:50,185 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:50,186 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:50,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:37:50,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:50,189 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:50,189 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:50,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:37:50,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:50,220 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:50,221 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:50,222 WARN L141 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size [2021-02-23 22:37:50,222 WARN L147 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size 7 [2021-02-23 22:37:50,229 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:50,230 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:50,238 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:50,238 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:50,247 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:50,248 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:50,258 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:50,258 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:50,270 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:50,270 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:50,283 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:50,284 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:50,297 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:50,298 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:50,313 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:50,314 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:50,330 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:50,330 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:50,347 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:50,348 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:50,372 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:50,373 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:50,392 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:50,393 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:50,412 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:50,413 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:50,435 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:50,436 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:50,458 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:50,458 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:50,482 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:50,483 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:37:50,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-02-23 22:37:50,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:50,510 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:50,511 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:50,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-02-23 22:37:50,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:50,513 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:50,513 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:50,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-02-23 22:37:50,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:50,517 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:50,517 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:50,593 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 6 proven. 567 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-02-23 22:37:50,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1062225711] [2021-02-23 22:37:50,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:37:50,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-02-23 22:37:50,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014979198] [2021-02-23 22:37:50,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-23 22:37:50,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:37:50,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-23 22:37:50,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=208, Unknown=0, NotChecked=0, Total=380 [2021-02-23 22:37:50,595 INFO L87 Difference]: Start difference. First operand 312 states and 380 transitions. Second operand 20 states. [2021-02-23 22:37:52,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:37:52,730 INFO L93 Difference]: Finished difference Result 703 states and 845 transitions. [2021-02-23 22:37:52,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-23 22:37:52,730 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 188 [2021-02-23 22:37:52,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:37:52,733 INFO L225 Difference]: With dead ends: 703 [2021-02-23 22:37:52,733 INFO L226 Difference]: Without dead ends: 510 [2021-02-23 22:37:52,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=547, Invalid=859, Unknown=0, NotChecked=0, Total=1406 [2021-02-23 22:37:52,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-02-23 22:37:52,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 322. [2021-02-23 22:37:52,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2021-02-23 22:37:52,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 393 transitions. [2021-02-23 22:37:52,836 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 393 transitions. Word has length 188 [2021-02-23 22:37:52,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:37:52,837 INFO L480 AbstractCegarLoop]: Abstraction has 322 states and 393 transitions. [2021-02-23 22:37:52,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-02-23 22:37:52,837 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 393 transitions. [2021-02-23 22:37:52,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-02-23 22:37:52,839 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:37:52,839 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:37:52,839 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-02-23 22:37:52,839 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:37:52,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:37:52,840 INFO L82 PathProgramCache]: Analyzing trace with hash -434677393, now seen corresponding path program 14 times [2021-02-23 22:37:52,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:37:52,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112443715] [2021-02-23 22:37:52,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:37:52,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:52,873 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:52,874 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:52,874 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:52,874 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:52,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:37:52,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:52,896 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:52,897 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:52,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:37:52,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:52,899 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:52,899 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:52,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:37:52,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:52,934 WARN L141 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size [2021-02-23 22:37:52,934 WARN L147 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size 7 [2021-02-23 22:37:52,941 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:52,941 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:52,951 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:52,952 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:52,964 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:52,964 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:52,977 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:52,978 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:52,993 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:52,993 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:53,009 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:53,010 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:53,027 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:53,028 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:53,047 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:53,047 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:53,067 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:53,068 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:53,089 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:53,090 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:53,113 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:53,113 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:53,138 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:53,139 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:53,165 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:53,166 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:53,194 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:53,194 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:37:53,223 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.6 percent of original size [2021-02-23 22:37:53,224 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.6 percent of original size 28 [2021-02-23 22:37:53,278 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:53,279 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:37:53,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-02-23 22:37:53,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:53,330 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:53,330 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:53,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-02-23 22:37:53,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:53,333 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:53,334 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:53,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-02-23 22:37:53,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:53,337 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:53,337 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:53,410 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 7 proven. 539 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-02-23 22:37:53,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112443715] [2021-02-23 22:37:53,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:37:53,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-02-23 22:37:53,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603655359] [2021-02-23 22:37:53,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-23 22:37:53,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:37:53,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-23 22:37:53,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-02-23 22:37:53,413 INFO L87 Difference]: Start difference. First operand 322 states and 393 transitions. Second operand 20 states. [2021-02-23 22:37:57,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:37:57,505 INFO L93 Difference]: Finished difference Result 593 states and 735 transitions. [2021-02-23 22:37:57,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-23 22:37:57,506 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 188 [2021-02-23 22:37:57,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:37:57,508 INFO L225 Difference]: With dead ends: 593 [2021-02-23 22:37:57,509 INFO L226 Difference]: Without dead ends: 402 [2021-02-23 22:37:57,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=232, Invalid=1174, Unknown=0, NotChecked=0, Total=1406 [2021-02-23 22:37:57,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-02-23 22:37:57,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 322. [2021-02-23 22:37:57,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2021-02-23 22:37:57,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 393 transitions. [2021-02-23 22:37:57,592 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 393 transitions. Word has length 188 [2021-02-23 22:37:57,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:37:57,593 INFO L480 AbstractCegarLoop]: Abstraction has 322 states and 393 transitions. [2021-02-23 22:37:57,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-02-23 22:37:57,593 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 393 transitions. [2021-02-23 22:37:57,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-02-23 22:37:57,595 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:37:57,595 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:37:57,595 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-02-23 22:37:57,595 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:37:57,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:37:57,596 INFO L82 PathProgramCache]: Analyzing trace with hash 981987875, now seen corresponding path program 16 times [2021-02-23 22:37:57,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:37:57,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1068622161] [2021-02-23 22:37:57,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:37:57,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:57,626 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:57,626 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:57,626 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:57,627 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:57,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:37:57,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:57,649 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:57,650 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:57,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:37:57,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:57,652 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:57,652 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:57,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:37:57,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:57,678 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:57,679 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:57,680 WARN L141 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size [2021-02-23 22:37:57,680 WARN L147 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size 7 [2021-02-23 22:37:57,686 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:57,687 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:57,695 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:57,695 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:57,704 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:57,704 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:57,714 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:57,714 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:57,725 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:57,726 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:57,738 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:57,738 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:57,752 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:57,753 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:57,771 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:57,772 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:57,791 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:57,792 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:57,811 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:57,812 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:57,834 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:57,835 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:57,859 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:57,859 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:57,884 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:57,885 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:57,911 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:57,912 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:57,938 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:57,939 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:57,966 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:57,970 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:37:58,001 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:58,001 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:37:58,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-02-23 22:37:58,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:58,029 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:58,029 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:58,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-02-23 22:37:58,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:58,031 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:58,032 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:58,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-02-23 22:37:58,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:37:58,037 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:37:58,037 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:37:58,105 INFO L134 CoverageAnalysis]: Checked inductivity of 683 backedges. 6 proven. 644 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-02-23 22:37:58,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1068622161] [2021-02-23 22:37:58,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:37:58,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-02-23 22:37:58,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464585222] [2021-02-23 22:37:58,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-23 22:37:58,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:37:58,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-23 22:37:58,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=229, Unknown=0, NotChecked=0, Total=420 [2021-02-23 22:37:58,107 INFO L87 Difference]: Start difference. First operand 322 states and 393 transitions. Second operand 21 states. [2021-02-23 22:38:01,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:38:01,205 INFO L93 Difference]: Finished difference Result 730 states and 878 transitions. [2021-02-23 22:38:01,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-23 22:38:01,207 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 193 [2021-02-23 22:38:01,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:38:01,210 INFO L225 Difference]: With dead ends: 730 [2021-02-23 22:38:01,210 INFO L226 Difference]: Without dead ends: 532 [2021-02-23 22:38:01,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=606, Invalid=954, Unknown=0, NotChecked=0, Total=1560 [2021-02-23 22:38:01,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-02-23 22:38:01,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 332. [2021-02-23 22:38:01,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2021-02-23 22:38:01,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 406 transitions. [2021-02-23 22:38:01,305 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 406 transitions. Word has length 193 [2021-02-23 22:38:01,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:38:01,305 INFO L480 AbstractCegarLoop]: Abstraction has 332 states and 406 transitions. [2021-02-23 22:38:01,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-02-23 22:38:01,305 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 406 transitions. [2021-02-23 22:38:01,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-02-23 22:38:01,306 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:38:01,306 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:38:01,306 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-02-23 22:38:01,307 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:38:01,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:38:01,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1028399403, now seen corresponding path program 15 times [2021-02-23 22:38:01,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:38:01,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [921464458] [2021-02-23 22:38:01,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:38:01,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:01,341 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:01,342 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:01,342 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:01,343 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:01,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:38:01,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:01,365 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:01,365 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:01,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:38:01,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:01,367 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:01,368 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:01,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:38:01,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:01,403 WARN L141 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size [2021-02-23 22:38:01,403 WARN L147 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size 7 [2021-02-23 22:38:01,410 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:01,410 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:01,420 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:01,421 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:01,432 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:01,433 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:01,446 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:01,446 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:01,471 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:01,471 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:01,486 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:01,488 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:01,504 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:01,505 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:01,522 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:01,524 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:01,543 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:01,544 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:01,569 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:01,570 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:01,598 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:01,599 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:01,626 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:01,627 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:01,657 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:01,657 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:01,689 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:01,690 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:01,724 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:01,725 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:01,760 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.6 percent of original size [2021-02-23 22:38:01,761 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.6 percent of original size 28 [2021-02-23 22:38:01,822 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:01,822 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:38:01,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-02-23 22:38:01,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:01,867 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:01,867 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:01,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-02-23 22:38:01,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:01,871 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:01,871 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:01,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-02-23 22:38:01,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:01,874 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:01,875 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:01,936 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 7 proven. 614 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-02-23 22:38:01,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [921464458] [2021-02-23 22:38:01,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:38:01,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-02-23 22:38:01,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773323913] [2021-02-23 22:38:01,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-23 22:38:01,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:38:01,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-23 22:38:01,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-02-23 22:38:01,938 INFO L87 Difference]: Start difference. First operand 332 states and 406 transitions. Second operand 21 states. [2021-02-23 22:38:06,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:38:06,066 INFO L93 Difference]: Finished difference Result 612 states and 760 transitions. [2021-02-23 22:38:06,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-23 22:38:06,066 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 193 [2021-02-23 22:38:06,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:38:06,068 INFO L225 Difference]: With dead ends: 612 [2021-02-23 22:38:06,068 INFO L226 Difference]: Without dead ends: 416 [2021-02-23 22:38:06,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=246, Invalid=1314, Unknown=0, NotChecked=0, Total=1560 [2021-02-23 22:38:06,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-02-23 22:38:06,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 332. [2021-02-23 22:38:06,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2021-02-23 22:38:06,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 406 transitions. [2021-02-23 22:38:06,167 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 406 transitions. Word has length 193 [2021-02-23 22:38:06,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:38:06,167 INFO L480 AbstractCegarLoop]: Abstraction has 332 states and 406 transitions. [2021-02-23 22:38:06,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-02-23 22:38:06,167 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 406 transitions. [2021-02-23 22:38:06,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-02-23 22:38:06,169 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:38:06,169 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:38:06,169 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-02-23 22:38:06,170 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:38:06,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:38:06,170 INFO L82 PathProgramCache]: Analyzing trace with hash -2113610627, now seen corresponding path program 17 times [2021-02-23 22:38:06,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:38:06,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978939779] [2021-02-23 22:38:06,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:38:06,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:06,200 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:06,201 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:06,201 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:06,201 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:06,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:38:06,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:06,224 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:06,224 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:06,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:38:06,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:06,226 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:06,227 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:06,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:38:06,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:06,256 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:06,257 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:06,257 WARN L141 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size [2021-02-23 22:38:06,258 WARN L147 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size 7 [2021-02-23 22:38:06,265 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:06,266 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:06,274 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:06,275 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:06,284 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:06,284 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:06,295 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:06,296 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:06,308 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:06,308 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:06,321 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:06,322 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:06,336 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:06,337 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:06,352 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:06,353 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:06,370 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:06,371 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:06,389 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:06,390 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:06,409 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:06,410 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:06,431 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:06,431 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:06,454 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:06,454 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:06,477 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:06,478 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:06,502 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:06,503 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:06,528 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:06,529 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:06,556 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:06,557 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:06,584 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:06,584 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:38:06,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-02-23 22:38:06,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:06,629 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:06,630 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:06,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-02-23 22:38:06,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:06,632 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:06,633 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:06,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2021-02-23 22:38:06,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:06,635 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:06,636 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:06,749 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 6 proven. 726 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-02-23 22:38:06,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978939779] [2021-02-23 22:38:06,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:38:06,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-02-23 22:38:06,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518321777] [2021-02-23 22:38:06,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-23 22:38:06,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:38:06,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-23 22:38:06,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=251, Unknown=0, NotChecked=0, Total=462 [2021-02-23 22:38:06,751 INFO L87 Difference]: Start difference. First operand 332 states and 406 transitions. Second operand 22 states. [2021-02-23 22:38:09,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:38:09,786 INFO L93 Difference]: Finished difference Result 757 states and 911 transitions. [2021-02-23 22:38:09,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-23 22:38:09,787 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 198 [2021-02-23 22:38:09,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:38:09,790 INFO L225 Difference]: With dead ends: 757 [2021-02-23 22:38:09,790 INFO L226 Difference]: Without dead ends: 554 [2021-02-23 22:38:09,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=668, Invalid=1054, Unknown=0, NotChecked=0, Total=1722 [2021-02-23 22:38:09,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-02-23 22:38:09,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 342. [2021-02-23 22:38:09,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 342 states. [2021-02-23 22:38:09,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 419 transitions. [2021-02-23 22:38:09,887 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 419 transitions. Word has length 198 [2021-02-23 22:38:09,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:38:09,888 INFO L480 AbstractCegarLoop]: Abstraction has 342 states and 419 transitions. [2021-02-23 22:38:09,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-02-23 22:38:09,888 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 419 transitions. [2021-02-23 22:38:09,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-02-23 22:38:09,889 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:38:09,889 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:38:09,890 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-02-23 22:38:09,890 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:38:09,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:38:09,890 INFO L82 PathProgramCache]: Analyzing trace with hash 170969391, now seen corresponding path program 16 times [2021-02-23 22:38:09,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:38:09,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899003043] [2021-02-23 22:38:09,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:38:09,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:09,925 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:09,925 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:09,926 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:09,926 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:09,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:38:09,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:09,959 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:09,960 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:09,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:38:09,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:09,962 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:09,962 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:09,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:38:09,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:09,998 WARN L141 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size [2021-02-23 22:38:09,998 WARN L147 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size 7 [2021-02-23 22:38:10,005 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:10,006 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:10,016 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:10,016 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:10,028 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:10,028 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:10,041 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:10,042 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:10,056 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:10,056 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:10,074 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:10,075 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:10,094 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:10,095 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:10,117 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:10,118 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:10,143 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:10,143 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:10,170 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:10,171 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:10,199 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:10,201 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:10,227 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:10,228 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:10,258 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:10,259 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:10,290 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:10,291 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:10,324 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:10,324 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:10,359 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:10,360 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:10,397 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.6 percent of original size [2021-02-23 22:38:10,399 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.6 percent of original size 28 [2021-02-23 22:38:10,464 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:10,464 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:38:10,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-02-23 22:38:10,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:10,515 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:10,515 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:10,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-02-23 22:38:10,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:10,516 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:10,517 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:10,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2021-02-23 22:38:10,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:10,519 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:10,519 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:10,573 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 7 proven. 694 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-02-23 22:38:10,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [899003043] [2021-02-23 22:38:10,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:38:10,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-02-23 22:38:10,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457610195] [2021-02-23 22:38:10,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-23 22:38:10,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:38:10,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-23 22:38:10,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-02-23 22:38:10,575 INFO L87 Difference]: Start difference. First operand 342 states and 419 transitions. Second operand 22 states. [2021-02-23 22:38:15,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:38:15,294 INFO L93 Difference]: Finished difference Result 631 states and 785 transitions. [2021-02-23 22:38:15,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-23 22:38:15,295 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 198 [2021-02-23 22:38:15,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:38:15,297 INFO L225 Difference]: With dead ends: 631 [2021-02-23 22:38:15,297 INFO L226 Difference]: Without dead ends: 430 [2021-02-23 22:38:15,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=260, Invalid=1462, Unknown=0, NotChecked=0, Total=1722 [2021-02-23 22:38:15,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-02-23 22:38:15,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 342. [2021-02-23 22:38:15,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 342 states. [2021-02-23 22:38:15,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 419 transitions. [2021-02-23 22:38:15,408 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 419 transitions. Word has length 198 [2021-02-23 22:38:15,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:38:15,408 INFO L480 AbstractCegarLoop]: Abstraction has 342 states and 419 transitions. [2021-02-23 22:38:15,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-02-23 22:38:15,408 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 419 transitions. [2021-02-23 22:38:15,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-02-23 22:38:15,410 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:38:15,410 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:38:15,411 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-02-23 22:38:15,411 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:38:15,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:38:15,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1872648803, now seen corresponding path program 18 times [2021-02-23 22:38:15,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:38:15,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [290423275] [2021-02-23 22:38:15,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:38:15,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:15,442 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:15,443 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:15,443 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:15,443 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:15,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:38:15,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:15,483 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:15,484 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:15,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:38:15,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:15,486 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:15,486 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:15,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:38:15,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:15,514 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:15,515 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:15,515 WARN L141 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size [2021-02-23 22:38:15,516 WARN L147 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size 7 [2021-02-23 22:38:15,522 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:15,523 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:15,531 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:15,532 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:15,540 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:15,541 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:15,552 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:15,552 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:15,564 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:15,564 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:15,576 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:15,577 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:15,591 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:15,592 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:15,606 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:15,607 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:15,622 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:15,623 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:15,639 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:15,639 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:15,657 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:15,658 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:15,677 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:15,678 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:15,698 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:15,698 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:15,719 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:15,719 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:15,741 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:15,742 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:15,772 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:15,772 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:15,803 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:15,803 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:15,835 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:15,836 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:15,869 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:15,869 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:38:15,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-02-23 22:38:15,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:15,899 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:15,899 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:15,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2021-02-23 22:38:15,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:15,901 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:15,902 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:15,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2021-02-23 22:38:15,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:15,905 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:15,905 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:15,956 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 6 proven. 813 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-02-23 22:38:15,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [290423275] [2021-02-23 22:38:15,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:38:15,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-02-23 22:38:15,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226320482] [2021-02-23 22:38:15,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-23 22:38:15,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:38:15,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-23 22:38:15,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=274, Unknown=0, NotChecked=0, Total=506 [2021-02-23 22:38:15,957 INFO L87 Difference]: Start difference. First operand 342 states and 419 transitions. Second operand 23 states. [2021-02-23 22:38:19,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:38:19,448 INFO L93 Difference]: Finished difference Result 784 states and 944 transitions. [2021-02-23 22:38:19,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-23 22:38:19,448 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 203 [2021-02-23 22:38:19,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:38:19,451 INFO L225 Difference]: With dead ends: 784 [2021-02-23 22:38:19,451 INFO L226 Difference]: Without dead ends: 576 [2021-02-23 22:38:19,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=733, Invalid=1159, Unknown=0, NotChecked=0, Total=1892 [2021-02-23 22:38:19,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-02-23 22:38:19,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 352. [2021-02-23 22:38:19,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2021-02-23 22:38:19,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 432 transitions. [2021-02-23 22:38:19,561 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 432 transitions. Word has length 203 [2021-02-23 22:38:19,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:38:19,562 INFO L480 AbstractCegarLoop]: Abstraction has 352 states and 432 transitions. [2021-02-23 22:38:19,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-02-23 22:38:19,562 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 432 transitions. [2021-02-23 22:38:19,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-02-23 22:38:19,564 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:38:19,564 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:38:19,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-02-23 22:38:19,564 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:38:19,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:38:19,565 INFO L82 PathProgramCache]: Analyzing trace with hash -137738475, now seen corresponding path program 17 times [2021-02-23 22:38:19,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:38:19,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867517483] [2021-02-23 22:38:19,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:38:19,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:19,600 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:19,601 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:19,601 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:19,602 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:19,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:38:19,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:19,624 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:19,625 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:19,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:38:19,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:19,627 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:19,627 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:19,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:38:19,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:19,665 WARN L141 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size [2021-02-23 22:38:19,666 WARN L147 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size 7 [2021-02-23 22:38:19,673 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:19,674 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:19,685 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:19,685 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:19,698 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:19,698 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:19,712 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:19,713 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:19,727 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:19,728 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:19,743 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:19,744 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:19,761 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:19,761 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:19,779 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:19,780 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:19,814 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:19,815 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:19,835 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:19,836 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:19,857 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:19,858 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:19,880 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:19,881 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:19,911 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:19,912 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:19,943 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:19,944 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:19,977 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:19,978 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:20,013 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:20,013 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:20,050 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:20,050 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:20,089 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.6 percent of original size [2021-02-23 22:38:20,090 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.6 percent of original size 28 [2021-02-23 22:38:20,158 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:20,159 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:38:20,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-02-23 22:38:20,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:20,212 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:20,212 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:20,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2021-02-23 22:38:20,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:20,218 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:20,218 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:20,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2021-02-23 22:38:20,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:20,221 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:20,221 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:20,282 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 7 proven. 779 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-02-23 22:38:20,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867517483] [2021-02-23 22:38:20,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:38:20,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-02-23 22:38:20,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747453345] [2021-02-23 22:38:20,283 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-23 22:38:20,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:38:20,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-23 22:38:20,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-02-23 22:38:20,283 INFO L87 Difference]: Start difference. First operand 352 states and 432 transitions. Second operand 23 states. [2021-02-23 22:38:24,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:38:24,825 INFO L93 Difference]: Finished difference Result 650 states and 810 transitions. [2021-02-23 22:38:24,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-23 22:38:24,826 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 203 [2021-02-23 22:38:24,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:38:24,829 INFO L225 Difference]: With dead ends: 650 [2021-02-23 22:38:24,829 INFO L226 Difference]: Without dead ends: 444 [2021-02-23 22:38:24,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=274, Invalid=1618, Unknown=0, NotChecked=0, Total=1892 [2021-02-23 22:38:24,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-02-23 22:38:24,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 352. [2021-02-23 22:38:24,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2021-02-23 22:38:24,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 432 transitions. [2021-02-23 22:38:24,941 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 432 transitions. Word has length 203 [2021-02-23 22:38:24,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:38:24,941 INFO L480 AbstractCegarLoop]: Abstraction has 352 states and 432 transitions. [2021-02-23 22:38:24,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-02-23 22:38:24,941 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 432 transitions. [2021-02-23 22:38:24,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-02-23 22:38:24,942 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:38:24,943 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:38:24,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-02-23 22:38:24,943 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:38:24,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:38:24,944 INFO L82 PathProgramCache]: Analyzing trace with hash -270164931, now seen corresponding path program 19 times [2021-02-23 22:38:24,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:38:24,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [414821362] [2021-02-23 22:38:24,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:38:24,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:24,973 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:24,974 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:24,974 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:24,975 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:24,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:38:24,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:24,996 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:24,997 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:24,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:38:24,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:24,999 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:24,999 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:24,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:38:25,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:25,029 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:25,030 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:25,030 WARN L141 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size [2021-02-23 22:38:25,031 WARN L147 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size 7 [2021-02-23 22:38:25,037 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:25,038 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:25,045 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:25,046 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:25,055 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:25,055 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:25,065 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:25,066 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:25,077 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:25,077 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:25,089 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:25,090 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:25,114 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:25,115 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:25,129 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:25,130 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:25,146 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:25,147 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:25,164 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:25,164 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:25,183 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:25,184 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:25,204 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:25,204 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:25,225 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:25,226 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:25,248 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:25,249 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:25,272 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:25,272 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:25,297 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:25,297 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:25,323 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:25,324 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:25,350 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:25,351 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:25,379 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:25,379 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:25,407 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:25,408 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:38:25,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2021-02-23 22:38:25,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:25,442 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:25,442 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:25,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2021-02-23 22:38:25,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:25,444 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:25,444 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:25,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2021-02-23 22:38:25,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:25,446 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:25,447 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:25,504 INFO L134 CoverageAnalysis]: Checked inductivity of 944 backedges. 6 proven. 905 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-02-23 22:38:25,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [414821362] [2021-02-23 22:38:25,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:38:25,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-02-23 22:38:25,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714613125] [2021-02-23 22:38:25,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-23 22:38:25,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:38:25,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-23 22:38:25,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=298, Unknown=0, NotChecked=0, Total=552 [2021-02-23 22:38:25,505 INFO L87 Difference]: Start difference. First operand 352 states and 432 transitions. Second operand 24 states. [2021-02-23 22:38:28,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:38:28,457 INFO L93 Difference]: Finished difference Result 811 states and 977 transitions. [2021-02-23 22:38:28,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-23 22:38:28,457 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 208 [2021-02-23 22:38:28,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:38:28,460 INFO L225 Difference]: With dead ends: 811 [2021-02-23 22:38:28,460 INFO L226 Difference]: Without dead ends: 598 [2021-02-23 22:38:28,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=801, Invalid=1269, Unknown=0, NotChecked=0, Total=2070 [2021-02-23 22:38:28,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-02-23 22:38:28,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 362. [2021-02-23 22:38:28,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 362 states. [2021-02-23 22:38:28,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 445 transitions. [2021-02-23 22:38:28,584 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 445 transitions. Word has length 208 [2021-02-23 22:38:28,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:38:28,585 INFO L480 AbstractCegarLoop]: Abstraction has 362 states and 445 transitions. [2021-02-23 22:38:28,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-02-23 22:38:28,585 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 445 transitions. [2021-02-23 22:38:28,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-02-23 22:38:28,586 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:38:28,587 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:38:28,587 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-02-23 22:38:28,587 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:38:28,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:38:28,587 INFO L82 PathProgramCache]: Analyzing trace with hash 2014415087, now seen corresponding path program 18 times [2021-02-23 22:38:28,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:38:28,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [85683873] [2021-02-23 22:38:28,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:38:28,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:28,622 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:28,623 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:28,623 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:28,623 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:28,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:38:28,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:28,646 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:28,647 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:28,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:38:28,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:28,648 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:28,649 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:28,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:38:28,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:28,692 WARN L141 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size [2021-02-23 22:38:28,692 WARN L147 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size 7 [2021-02-23 22:38:28,700 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:28,701 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:28,712 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:28,712 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:28,726 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:28,726 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:28,740 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:28,741 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:28,756 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:28,757 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:28,780 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:28,780 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:28,810 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:28,811 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:28,835 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:28,835 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:28,859 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:28,860 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:28,882 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:28,883 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:28,913 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:28,914 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:28,945 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:28,946 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:28,976 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:28,977 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:29,011 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:29,012 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:29,046 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:29,047 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:29,083 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:29,084 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:29,120 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:29,121 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:29,172 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:29,173 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:29,216 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.6 percent of original size [2021-02-23 22:38:29,217 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.6 percent of original size 28 [2021-02-23 22:38:29,293 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:29,294 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:38:29,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2021-02-23 22:38:29,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:29,374 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:29,375 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:29,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2021-02-23 22:38:29,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:29,378 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:29,378 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:29,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2021-02-23 22:38:29,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:29,381 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:29,381 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:29,488 INFO L134 CoverageAnalysis]: Checked inductivity of 906 backedges. 7 proven. 869 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-02-23 22:38:29,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [85683873] [2021-02-23 22:38:29,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:38:29,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-02-23 22:38:29,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477982056] [2021-02-23 22:38:29,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-23 22:38:29,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:38:29,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-23 22:38:29,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-02-23 22:38:29,491 INFO L87 Difference]: Start difference. First operand 362 states and 445 transitions. Second operand 24 states. [2021-02-23 22:38:35,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:38:35,316 INFO L93 Difference]: Finished difference Result 669 states and 835 transitions. [2021-02-23 22:38:35,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-23 22:38:35,316 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 208 [2021-02-23 22:38:35,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:38:35,318 INFO L225 Difference]: With dead ends: 669 [2021-02-23 22:38:35,318 INFO L226 Difference]: Without dead ends: 458 [2021-02-23 22:38:35,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=288, Invalid=1782, Unknown=0, NotChecked=0, Total=2070 [2021-02-23 22:38:35,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-02-23 22:38:35,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 362. [2021-02-23 22:38:35,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 362 states. [2021-02-23 22:38:35,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 445 transitions. [2021-02-23 22:38:35,424 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 445 transitions. Word has length 208 [2021-02-23 22:38:35,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:38:35,424 INFO L480 AbstractCegarLoop]: Abstraction has 362 states and 445 transitions. [2021-02-23 22:38:35,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-02-23 22:38:35,425 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 445 transitions. [2021-02-23 22:38:35,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-02-23 22:38:35,426 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:38:35,426 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:38:35,426 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-02-23 22:38:35,427 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:38:35,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:38:35,427 INFO L82 PathProgramCache]: Analyzing trace with hash -486575453, now seen corresponding path program 20 times [2021-02-23 22:38:35,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:38:35,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040253563] [2021-02-23 22:38:35,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:38:35,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:35,458 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:35,459 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:35,459 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:35,459 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:35,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:38:35,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:35,486 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:35,487 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:35,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:38:35,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:35,489 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:35,489 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:35,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:38:35,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:35,519 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:35,520 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:35,521 WARN L141 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size [2021-02-23 22:38:35,521 WARN L147 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size 7 [2021-02-23 22:38:35,527 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:35,528 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:35,536 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:35,536 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:35,545 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:35,546 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:35,556 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:35,556 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:35,567 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:35,568 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:35,580 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:35,580 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:35,594 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:35,595 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:35,609 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:35,609 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:35,625 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:35,626 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:35,643 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:35,644 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:35,662 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:35,663 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:35,682 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:35,683 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:35,704 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:35,704 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:35,727 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:35,727 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:35,750 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:35,751 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:35,775 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:35,775 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:35,801 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:35,801 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:35,827 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:35,828 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:35,862 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:35,862 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:35,898 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:35,904 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:35,939 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:35,940 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:38:35,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-02-23 22:38:35,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:35,983 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:35,984 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:35,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2021-02-23 22:38:35,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:35,990 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:35,991 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:35,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2021-02-23 22:38:35,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:35,994 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:35,994 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:36,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1041 backedges. 6 proven. 1002 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-02-23 22:38:36,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040253563] [2021-02-23 22:38:36,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:38:36,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-02-23 22:38:36,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508767318] [2021-02-23 22:38:36,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-23 22:38:36,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:38:36,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-23 22:38:36,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=323, Unknown=0, NotChecked=0, Total=600 [2021-02-23 22:38:36,071 INFO L87 Difference]: Start difference. First operand 362 states and 445 transitions. Second operand 25 states. [2021-02-23 22:38:38,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:38:38,696 INFO L93 Difference]: Finished difference Result 838 states and 1010 transitions. [2021-02-23 22:38:38,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-23 22:38:38,697 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 213 [2021-02-23 22:38:38,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:38:38,700 INFO L225 Difference]: With dead ends: 838 [2021-02-23 22:38:38,700 INFO L226 Difference]: Without dead ends: 620 [2021-02-23 22:38:38,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=872, Invalid=1384, Unknown=0, NotChecked=0, Total=2256 [2021-02-23 22:38:38,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-02-23 22:38:38,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 372. [2021-02-23 22:38:38,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2021-02-23 22:38:38,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 458 transitions. [2021-02-23 22:38:38,805 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 458 transitions. Word has length 213 [2021-02-23 22:38:38,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:38:38,805 INFO L480 AbstractCegarLoop]: Abstraction has 372 states and 458 transitions. [2021-02-23 22:38:38,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-02-23 22:38:38,806 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 458 transitions. [2021-02-23 22:38:38,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-02-23 22:38:38,807 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:38:38,808 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:38:38,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-02-23 22:38:38,808 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:38:38,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:38:38,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1798004565, now seen corresponding path program 19 times [2021-02-23 22:38:38,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:38:38,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [641912675] [2021-02-23 22:38:38,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:38:38,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:38,848 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:38,849 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:38,849 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:38,849 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:38,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:38:38,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:38,872 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:38,873 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:38,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:38:38,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:38,875 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:38,875 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:38,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:38:38,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:38,922 WARN L141 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size [2021-02-23 22:38:38,922 WARN L147 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size 7 [2021-02-23 22:38:38,929 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:38,930 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:38,941 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:38,942 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:38,954 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:38,955 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:38,969 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:38,971 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:38,986 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:38,987 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:39,004 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:39,005 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:39,024 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:39,024 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:39,043 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:39,044 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:39,066 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:39,066 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:39,087 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:39,088 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:39,110 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:39,110 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:39,134 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:39,135 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:39,159 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:39,160 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:39,187 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:39,187 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:39,215 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:39,215 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:39,245 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:39,245 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:39,275 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:39,275 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:39,307 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:39,307 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:39,351 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:39,352 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:39,387 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.6 percent of original size [2021-02-23 22:38:39,388 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.6 percent of original size 28 [2021-02-23 22:38:39,456 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:39,456 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:38:39,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-02-23 22:38:39,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:39,536 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:39,537 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:39,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2021-02-23 22:38:39,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:39,539 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:39,540 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:39,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2021-02-23 22:38:39,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:39,543 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:39,544 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:39,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 7 proven. 964 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-02-23 22:38:39,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [641912675] [2021-02-23 22:38:39,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:38:39,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-02-23 22:38:39,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304226006] [2021-02-23 22:38:39,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-23 22:38:39,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:38:39,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-23 22:38:39,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-02-23 22:38:39,669 INFO L87 Difference]: Start difference. First operand 372 states and 458 transitions. Second operand 25 states. [2021-02-23 22:38:46,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:38:46,072 INFO L93 Difference]: Finished difference Result 688 states and 860 transitions. [2021-02-23 22:38:46,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-23 22:38:46,072 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 213 [2021-02-23 22:38:46,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:38:46,074 INFO L225 Difference]: With dead ends: 688 [2021-02-23 22:38:46,075 INFO L226 Difference]: Without dead ends: 472 [2021-02-23 22:38:46,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=302, Invalid=1954, Unknown=0, NotChecked=0, Total=2256 [2021-02-23 22:38:46,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-02-23 22:38:46,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 372. [2021-02-23 22:38:46,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2021-02-23 22:38:46,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 458 transitions. [2021-02-23 22:38:46,178 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 458 transitions. Word has length 213 [2021-02-23 22:38:46,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:38:46,178 INFO L480 AbstractCegarLoop]: Abstraction has 372 states and 458 transitions. [2021-02-23 22:38:46,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-02-23 22:38:46,179 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 458 transitions. [2021-02-23 22:38:46,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-02-23 22:38:46,180 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:38:46,180 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:38:46,181 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-02-23 22:38:46,181 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:38:46,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:38:46,181 INFO L82 PathProgramCache]: Analyzing trace with hash -760632323, now seen corresponding path program 21 times [2021-02-23 22:38:46,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:38:46,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [864777441] [2021-02-23 22:38:46,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:38:46,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:46,213 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:46,213 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:46,214 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:46,214 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:46,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:38:46,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:46,236 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:46,236 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:46,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:38:46,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:46,238 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:46,239 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:46,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:38:46,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:46,270 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:46,270 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:46,271 WARN L141 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size [2021-02-23 22:38:46,271 WARN L147 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size 7 [2021-02-23 22:38:46,278 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:46,278 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:46,286 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:46,286 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:46,298 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:46,298 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:46,308 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:46,309 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:46,320 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:46,320 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:46,331 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:46,332 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:46,349 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:46,349 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:46,368 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:46,368 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:46,388 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:46,389 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:46,410 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:46,410 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:46,433 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:46,433 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:46,457 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:46,457 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:46,483 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:46,483 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:46,510 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:46,510 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:46,544 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:46,545 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:46,573 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:46,574 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:46,605 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:46,605 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:46,640 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:46,641 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:46,674 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:46,675 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:46,710 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:46,710 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:46,755 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:46,756 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:46,794 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:46,794 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:38:46,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-02-23 22:38:46,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:46,835 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:46,838 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:46,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2021-02-23 22:38:46,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:46,840 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:46,840 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:46,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2021-02-23 22:38:46,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:46,843 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:46,843 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:46,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 6 proven. 1104 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-02-23 22:38:46,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [864777441] [2021-02-23 22:38:46,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:38:46,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-02-23 22:38:46,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677924271] [2021-02-23 22:38:46,938 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-02-23 22:38:46,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:38:46,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-02-23 22:38:46,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=349, Unknown=0, NotChecked=0, Total=650 [2021-02-23 22:38:46,939 INFO L87 Difference]: Start difference. First operand 372 states and 458 transitions. Second operand 26 states. [2021-02-23 22:38:50,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:38:50,001 INFO L93 Difference]: Finished difference Result 865 states and 1043 transitions. [2021-02-23 22:38:50,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-23 22:38:50,002 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 218 [2021-02-23 22:38:50,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:38:50,005 INFO L225 Difference]: With dead ends: 865 [2021-02-23 22:38:50,005 INFO L226 Difference]: Without dead ends: 642 [2021-02-23 22:38:50,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=946, Invalid=1504, Unknown=0, NotChecked=0, Total=2450 [2021-02-23 22:38:50,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-02-23 22:38:50,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 382. [2021-02-23 22:38:50,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 382 states. [2021-02-23 22:38:50,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 471 transitions. [2021-02-23 22:38:50,093 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 471 transitions. Word has length 218 [2021-02-23 22:38:50,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:38:50,093 INFO L480 AbstractCegarLoop]: Abstraction has 382 states and 471 transitions. [2021-02-23 22:38:50,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-02-23 22:38:50,094 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 471 transitions. [2021-02-23 22:38:50,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-02-23 22:38:50,095 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:38:50,095 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:38:50,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-02-23 22:38:50,096 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:38:50,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:38:50,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1523947695, now seen corresponding path program 20 times [2021-02-23 22:38:50,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:38:50,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746865661] [2021-02-23 22:38:50,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:38:50,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:50,135 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:50,135 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:50,136 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:50,136 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:50,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:38:50,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:50,158 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:50,158 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:50,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:38:50,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:50,160 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:50,161 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:50,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:38:50,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:50,213 WARN L141 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size [2021-02-23 22:38:50,213 WARN L147 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size 7 [2021-02-23 22:38:50,220 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:50,221 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:50,232 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:50,232 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:50,246 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:50,247 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:50,260 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:50,261 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:50,276 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:50,276 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:50,292 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:50,293 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:50,311 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:50,312 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:50,332 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:50,333 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:50,353 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:50,354 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:50,378 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:50,378 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:50,402 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:50,403 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:50,428 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:50,429 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:50,456 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:50,456 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:50,485 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:50,486 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:50,515 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:50,515 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:50,547 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:50,548 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:50,580 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:50,580 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:50,616 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:50,617 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:50,651 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:50,651 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:50,684 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:50,685 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:38:50,721 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.6 percent of original size [2021-02-23 22:38:50,721 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.6 percent of original size 28 [2021-02-23 22:38:50,793 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:50,794 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:38:50,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-02-23 22:38:50,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:50,882 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:50,882 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:50,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2021-02-23 22:38:50,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:50,885 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:50,885 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:50,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2021-02-23 22:38:50,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:50,887 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:50,888 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:50,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1101 backedges. 7 proven. 1064 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-02-23 22:38:50,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746865661] [2021-02-23 22:38:50,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:38:50,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-02-23 22:38:50,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006764840] [2021-02-23 22:38:50,996 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-02-23 22:38:50,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:38:50,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-02-23 22:38:50,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-02-23 22:38:50,997 INFO L87 Difference]: Start difference. First operand 382 states and 471 transitions. Second operand 26 states. [2021-02-23 22:38:57,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:38:57,900 INFO L93 Difference]: Finished difference Result 707 states and 885 transitions. [2021-02-23 22:38:57,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-23 22:38:57,900 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 218 [2021-02-23 22:38:57,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:38:57,902 INFO L225 Difference]: With dead ends: 707 [2021-02-23 22:38:57,902 INFO L226 Difference]: Without dead ends: 486 [2021-02-23 22:38:57,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=316, Invalid=2134, Unknown=0, NotChecked=0, Total=2450 [2021-02-23 22:38:57,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-02-23 22:38:57,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 382. [2021-02-23 22:38:57,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 382 states. [2021-02-23 22:38:57,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 471 transitions. [2021-02-23 22:38:57,998 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 471 transitions. Word has length 218 [2021-02-23 22:38:57,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:38:57,998 INFO L480 AbstractCegarLoop]: Abstraction has 382 states and 471 transitions. [2021-02-23 22:38:57,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-02-23 22:38:57,998 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 471 transitions. [2021-02-23 22:38:57,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-02-23 22:38:57,999 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:38:58,000 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:38:58,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-02-23 22:38:58,000 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:38:58,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:38:58,000 INFO L82 PathProgramCache]: Analyzing trace with hash -82887965, now seen corresponding path program 22 times [2021-02-23 22:38:58,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:38:58,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816137418] [2021-02-23 22:38:58,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:38:58,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:58,031 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:58,032 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:58,032 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:58,032 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:58,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:38:58,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:58,056 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:58,056 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:58,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:38:58,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:58,058 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:58,059 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:58,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:38:58,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:58,092 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:58,092 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:58,093 WARN L141 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size [2021-02-23 22:38:58,094 WARN L147 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size 7 [2021-02-23 22:38:58,101 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:58,101 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:58,109 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:58,110 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:58,119 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:58,119 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:58,130 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:58,131 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:58,142 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:58,143 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:58,157 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:58,157 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:58,172 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:58,172 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:58,190 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:58,190 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:58,208 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:58,209 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:58,228 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:58,228 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:58,249 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:58,249 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:58,272 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:58,273 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:58,293 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:58,294 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:58,320 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:58,320 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:58,348 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:58,349 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:58,374 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:58,375 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:58,403 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:58,404 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:58,430 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:58,430 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:58,459 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:58,460 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:58,488 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:58,489 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:58,520 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:58,521 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:58,554 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:58,564 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:38:58,599 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:58,599 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:38:58,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2021-02-23 22:38:58,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:58,657 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:58,657 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:58,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2021-02-23 22:38:58,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:58,659 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:58,660 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:58,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2021-02-23 22:38:58,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:38:58,662 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:38:58,662 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:38:58,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 6 proven. 1211 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-02-23 22:38:58,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816137418] [2021-02-23 22:38:58,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:38:58,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-02-23 22:38:58,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880411348] [2021-02-23 22:38:58,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-23 22:38:58,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:38:58,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-23 22:38:58,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=376, Unknown=0, NotChecked=0, Total=702 [2021-02-23 22:38:58,765 INFO L87 Difference]: Start difference. First operand 382 states and 471 transitions. Second operand 27 states. [2021-02-23 22:39:02,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:39:02,487 INFO L93 Difference]: Finished difference Result 892 states and 1076 transitions. [2021-02-23 22:39:02,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-23 22:39:02,487 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 223 [2021-02-23 22:39:02,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:39:02,491 INFO L225 Difference]: With dead ends: 892 [2021-02-23 22:39:02,491 INFO L226 Difference]: Without dead ends: 664 [2021-02-23 22:39:02,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1023, Invalid=1629, Unknown=0, NotChecked=0, Total=2652 [2021-02-23 22:39:02,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-02-23 22:39:02,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 392. [2021-02-23 22:39:02,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2021-02-23 22:39:02,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 484 transitions. [2021-02-23 22:39:02,586 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 484 transitions. Word has length 223 [2021-02-23 22:39:02,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:39:02,586 INFO L480 AbstractCegarLoop]: Abstraction has 392 states and 484 transitions. [2021-02-23 22:39:02,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-02-23 22:39:02,586 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 484 transitions. [2021-02-23 22:39:02,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-02-23 22:39:02,587 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:39:02,588 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:39:02,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-02-23 22:39:02,588 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:39:02,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:39:02,588 INFO L82 PathProgramCache]: Analyzing trace with hash -2093275243, now seen corresponding path program 21 times [2021-02-23 22:39:02,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:39:02,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261922943] [2021-02-23 22:39:02,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:39:02,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:02,627 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:02,627 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:02,628 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:02,628 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:02,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:39:02,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:02,650 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:02,650 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:02,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:39:02,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:02,652 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:02,652 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:02,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:39:02,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:02,696 WARN L141 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size [2021-02-23 22:39:02,697 WARN L147 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size 7 [2021-02-23 22:39:02,704 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:02,705 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:39:02,716 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:02,717 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:39:02,729 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:02,729 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:39:02,742 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:02,743 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:39:02,757 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:02,758 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:39:02,773 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:02,774 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:39:02,791 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:02,791 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:39:02,815 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:02,816 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:39:02,840 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:02,840 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:39:02,865 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:02,866 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:39:02,893 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:02,894 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:39:02,923 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:02,924 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:39:02,956 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:02,957 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:39:02,990 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:02,991 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:39:03,025 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:03,025 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:39:03,061 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:03,061 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:39:03,098 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:03,099 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:39:03,137 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:03,138 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:39:03,178 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:03,180 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:39:03,222 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:03,222 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:39:03,266 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:03,266 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:39:03,312 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.6 percent of original size [2021-02-23 22:39:03,313 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.6 percent of original size 28 [2021-02-23 22:39:03,394 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:03,395 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:39:03,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2021-02-23 22:39:03,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:03,477 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:03,478 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:03,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2021-02-23 22:39:03,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:03,480 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:03,481 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:03,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2021-02-23 22:39:03,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:03,486 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:03,487 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:03,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1206 backedges. 7 proven. 1169 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-02-23 22:39:03,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261922943] [2021-02-23 22:39:03,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:39:03,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-02-23 22:39:03,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257391513] [2021-02-23 22:39:03,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-23 22:39:03,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:39:03,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-23 22:39:03,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-02-23 22:39:03,600 INFO L87 Difference]: Start difference. First operand 392 states and 484 transitions. Second operand 27 states. [2021-02-23 22:39:09,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:39:09,892 INFO L93 Difference]: Finished difference Result 726 states and 910 transitions. [2021-02-23 22:39:09,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-23 22:39:09,892 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 223 [2021-02-23 22:39:09,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:39:09,897 INFO L225 Difference]: With dead ends: 726 [2021-02-23 22:39:09,897 INFO L226 Difference]: Without dead ends: 500 [2021-02-23 22:39:09,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=330, Invalid=2322, Unknown=0, NotChecked=0, Total=2652 [2021-02-23 22:39:09,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-02-23 22:39:09,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 392. [2021-02-23 22:39:09,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2021-02-23 22:39:09,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 484 transitions. [2021-02-23 22:39:09,999 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 484 transitions. Word has length 223 [2021-02-23 22:39:09,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:39:09,999 INFO L480 AbstractCegarLoop]: Abstraction has 392 states and 484 transitions. [2021-02-23 22:39:09,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-02-23 22:39:10,000 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 484 transitions. [2021-02-23 22:39:10,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-02-23 22:39:10,001 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:39:10,001 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:39:10,002 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-02-23 22:39:10,002 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:39:10,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:39:10,002 INFO L82 PathProgramCache]: Analyzing trace with hash 577571773, now seen corresponding path program 23 times [2021-02-23 22:39:10,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:39:10,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [519725482] [2021-02-23 22:39:10,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:39:10,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:10,044 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:10,044 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:10,045 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:10,045 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:10,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:39:10,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:10,068 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:10,068 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:10,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:39:10,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:10,070 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:10,071 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:10,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:39:10,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:10,104 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:10,104 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:10,105 WARN L141 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size [2021-02-23 22:39:10,105 WARN L147 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size 7 [2021-02-23 22:39:10,112 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:10,113 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:39:10,121 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:10,121 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:39:10,131 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:10,131 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:39:10,141 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:10,142 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:39:10,154 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:10,154 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:39:10,167 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:10,167 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:39:10,181 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:10,182 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:39:10,196 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:10,197 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:39:10,215 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:10,215 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:39:10,232 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:10,233 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:39:10,251 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:10,251 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:39:10,278 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:10,278 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:39:10,304 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:10,304 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:39:10,332 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:10,332 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:39:10,361 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:10,361 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:39:10,391 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:10,392 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:39:10,423 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:10,423 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:39:10,456 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:10,457 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:39:10,491 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:10,491 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:39:10,529 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:10,529 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:39:10,565 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:10,566 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:39:10,603 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:10,604 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:39:10,643 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:10,644 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:39:10,685 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:10,686 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:39:10,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-02-23 22:39:10,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:10,731 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:10,734 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:10,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2021-02-23 22:39:10,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:10,737 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:10,738 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:10,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2021-02-23 22:39:10,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:10,741 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:10,742 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:10,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1362 backedges. 6 proven. 1323 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-02-23 22:39:10,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [519725482] [2021-02-23 22:39:10,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:39:10,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-02-23 22:39:10,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028382150] [2021-02-23 22:39:10,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-23 22:39:10,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:39:10,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-23 22:39:10,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=404, Unknown=0, NotChecked=0, Total=756 [2021-02-23 22:39:10,850 INFO L87 Difference]: Start difference. First operand 392 states and 484 transitions. Second operand 28 states. [2021-02-23 22:39:14,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:39:14,780 INFO L93 Difference]: Finished difference Result 919 states and 1109 transitions. [2021-02-23 22:39:14,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-23 22:39:14,781 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 228 [2021-02-23 22:39:14,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:39:14,786 INFO L225 Difference]: With dead ends: 919 [2021-02-23 22:39:14,786 INFO L226 Difference]: Without dead ends: 686 [2021-02-23 22:39:14,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1103, Invalid=1759, Unknown=0, NotChecked=0, Total=2862 [2021-02-23 22:39:14,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2021-02-23 22:39:14,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 402. [2021-02-23 22:39:14,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 402 states. [2021-02-23 22:39:14,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 497 transitions. [2021-02-23 22:39:14,958 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 497 transitions. Word has length 228 [2021-02-23 22:39:14,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:39:14,958 INFO L480 AbstractCegarLoop]: Abstraction has 402 states and 497 transitions. [2021-02-23 22:39:14,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-02-23 22:39:14,958 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 497 transitions. [2021-02-23 22:39:14,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-02-23 22:39:14,960 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:39:14,960 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:39:14,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-02-23 22:39:14,961 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:39:14,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:39:14,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1432815505, now seen corresponding path program 22 times [2021-02-23 22:39:14,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:39:14,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1499371478] [2021-02-23 22:39:14,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:39:14,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:15,003 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:15,003 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:15,004 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:15,004 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:15,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:39:15,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:15,026 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:15,026 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:15,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:39:15,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:15,028 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:15,028 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:15,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:39:15,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:15,074 WARN L141 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size [2021-02-23 22:39:15,074 WARN L147 QuantifierPusher]: treesize reduction 7, result has 50.0 percent of original size 7 [2021-02-23 22:39:15,081 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:15,082 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:39:15,092 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:15,093 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:39:15,105 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:15,106 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:39:15,119 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:15,119 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:39:15,133 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:15,134 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:39:15,150 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:15,151 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:39:15,168 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:15,169 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:39:15,188 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:15,188 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:39:15,208 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:15,209 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:39:15,230 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:15,231 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:39:15,252 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:15,253 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:39:15,282 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:15,282 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:39:15,313 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:15,314 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:39:15,346 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:15,347 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:39:15,380 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:15,380 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:39:15,421 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:15,422 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:39:15,457 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:15,458 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:39:15,497 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:15,498 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:39:15,538 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:15,539 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:39:15,581 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:15,581 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:39:15,625 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:15,627 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:39:15,671 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:15,672 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 22:39:15,718 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.6 percent of original size [2021-02-23 22:39:15,719 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.6 percent of original size 28 [2021-02-23 22:39:15,804 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:15,807 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:39:15,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-02-23 22:39:15,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:15,884 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:15,885 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:15,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2021-02-23 22:39:15,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:15,887 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:15,887 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:15,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2021-02-23 22:39:15,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:15,889 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:15,889 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:15,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1316 backedges. 7 proven. 1279 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-02-23 22:39:15,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1499371478] [2021-02-23 22:39:15,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:39:15,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-02-23 22:39:15,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878203922] [2021-02-23 22:39:15,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-23 22:39:15,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:39:15,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-23 22:39:15,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2021-02-23 22:39:15,984 INFO L87 Difference]: Start difference. First operand 402 states and 497 transitions. Second operand 28 states. [2021-02-23 22:39:23,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:39:23,194 INFO L93 Difference]: Finished difference Result 745 states and 935 transitions. [2021-02-23 22:39:23,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-23 22:39:23,195 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 228 [2021-02-23 22:39:23,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:39:23,197 INFO L225 Difference]: With dead ends: 745 [2021-02-23 22:39:23,197 INFO L226 Difference]: Without dead ends: 514 [2021-02-23 22:39:23,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=344, Invalid=2518, Unknown=0, NotChecked=0, Total=2862 [2021-02-23 22:39:23,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-02-23 22:39:23,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 402. [2021-02-23 22:39:23,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 402 states. [2021-02-23 22:39:23,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 497 transitions. [2021-02-23 22:39:23,297 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 497 transitions. Word has length 228 [2021-02-23 22:39:23,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:39:23,297 INFO L480 AbstractCegarLoop]: Abstraction has 402 states and 497 transitions. [2021-02-23 22:39:23,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-02-23 22:39:23,297 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 497 transitions. [2021-02-23 22:39:23,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-02-23 22:39:23,298 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:39:23,298 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:39:23,298 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-02-23 22:39:23,299 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:39:23,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:39:23,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1899082531, now seen corresponding path program 24 times [2021-02-23 22:39:23,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:39:23,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562639919] [2021-02-23 22:39:23,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:39:23,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:23,330 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:23,330 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:23,331 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:23,331 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:23,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:39:23,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:23,355 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:23,355 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:23,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:39:23,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:23,357 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:23,358 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:23,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:39:23,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:23,393 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:23,393 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:23,394 WARN L141 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size [2021-02-23 22:39:23,394 WARN L147 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size 7 [2021-02-23 22:39:23,401 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:23,402 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:39:23,410 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:23,410 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:39:23,419 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:23,420 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:39:23,430 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:23,430 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:39:23,442 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:23,442 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:39:23,455 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:23,456 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:39:23,469 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:23,470 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:39:23,485 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:23,486 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:39:23,503 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:23,503 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:39:23,520 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:23,521 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:39:23,539 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:23,540 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:39:23,559 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:23,559 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:39:23,582 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:23,582 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:39:23,611 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:23,612 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:39:23,636 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:23,637 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:39:23,665 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:23,666 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:39:23,697 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:23,698 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:39:23,730 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:23,731 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:39:23,766 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:23,766 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:39:23,802 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:23,802 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:39:23,838 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:23,839 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:39:23,877 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:23,878 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:39:23,918 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:23,919 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:39:23,960 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:23,962 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:39:24,005 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:24,006 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:39:24,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2021-02-23 22:39:24,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:24,063 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:24,063 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:24,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2021-02-23 22:39:24,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:24,064 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:24,065 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:24,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2021-02-23 22:39:24,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:24,067 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:24,067 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:24,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1479 backedges. 6 proven. 1440 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-02-23 22:39:24,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562639919] [2021-02-23 22:39:24,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:39:24,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2021-02-23 22:39:24,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977534352] [2021-02-23 22:39:24,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-02-23 22:39:24,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:39:24,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-02-23 22:39:24,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=433, Unknown=0, NotChecked=0, Total=812 [2021-02-23 22:39:24,144 INFO L87 Difference]: Start difference. First operand 402 states and 497 transitions. Second operand 29 states. [2021-02-23 22:39:28,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:39:28,375 INFO L93 Difference]: Finished difference Result 946 states and 1142 transitions. [2021-02-23 22:39:28,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-23 22:39:28,376 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 233 [2021-02-23 22:39:28,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:39:28,380 INFO L225 Difference]: With dead ends: 946 [2021-02-23 22:39:28,380 INFO L226 Difference]: Without dead ends: 708 [2021-02-23 22:39:28,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1186, Invalid=1894, Unknown=0, NotChecked=0, Total=3080 [2021-02-23 22:39:28,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2021-02-23 22:39:28,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 412. [2021-02-23 22:39:28,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2021-02-23 22:39:28,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 510 transitions. [2021-02-23 22:39:28,522 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 510 transitions. Word has length 233 [2021-02-23 22:39:28,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:39:28,522 INFO L480 AbstractCegarLoop]: Abstraction has 412 states and 510 transitions. [2021-02-23 22:39:28,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-02-23 22:39:28,523 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 510 transitions. [2021-02-23 22:39:28,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-02-23 22:39:28,524 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:39:28,524 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:39:28,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-02-23 22:39:28,524 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:39:28,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:39:28,525 INFO L82 PathProgramCache]: Analyzing trace with hash -111304747, now seen corresponding path program 23 times [2021-02-23 22:39:28,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:39:28,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [688399968] [2021-02-23 22:39:28,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:39:28,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:28,592 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:28,593 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:28,593 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:28,593 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:28,596 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:28,597 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:28,608 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:28,608 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 22:39:28,615 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:28,615 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-23 22:39:28,633 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size [2021-02-23 22:39:28,634 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size 26 [2021-02-23 22:39:28,653 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:28,653 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:28,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:39:28,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:28,686 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:28,687 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:28,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:39:28,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:28,695 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:28,695 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:28,696 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:28,696 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:39:28,706 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:28,707 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:39:28,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:39:28,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:28,737 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:28,737 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:28,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2021-02-23 22:39:28,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:28,750 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:28,750 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:28,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2021-02-23 22:39:28,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:28,752 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:28,753 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:28,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2021-02-23 22:39:28,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:28,758 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:28,758 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:28,759 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:28,759 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:39:28,772 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:28,772 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:39:28,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1422 trivial. 0 not checked. [2021-02-23 22:39:28,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [688399968] [2021-02-23 22:39:28,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:39:28,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-02-23 22:39:28,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967159253] [2021-02-23 22:39:28,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-23 22:39:28,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:39:28,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-23 22:39:28,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-02-23 22:39:28,826 INFO L87 Difference]: Start difference. First operand 412 states and 510 transitions. Second operand 11 states. [2021-02-23 22:39:30,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:39:30,405 INFO L93 Difference]: Finished difference Result 468 states and 590 transitions. [2021-02-23 22:39:30,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-23 22:39:30,406 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 233 [2021-02-23 22:39:30,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:39:30,410 INFO L225 Difference]: With dead ends: 468 [2021-02-23 22:39:30,410 INFO L226 Difference]: Without dead ends: 460 [2021-02-23 22:39:30,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-02-23 22:39:30,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-02-23 22:39:30,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 446. [2021-02-23 22:39:30,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 446 states. [2021-02-23 22:39:30,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 557 transitions. [2021-02-23 22:39:30,562 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 557 transitions. Word has length 233 [2021-02-23 22:39:30,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:39:30,563 INFO L480 AbstractCegarLoop]: Abstraction has 446 states and 557 transitions. [2021-02-23 22:39:30,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-23 22:39:30,563 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 557 transitions. [2021-02-23 22:39:30,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-02-23 22:39:30,565 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:39:30,565 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:39:30,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-02-23 22:39:30,566 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:39:30,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:39:30,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1147901028, now seen corresponding path program 1 times [2021-02-23 22:39:30,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:39:30,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1930590541] [2021-02-23 22:39:30,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:39:30,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:30,599 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:30,600 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:30,600 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:30,601 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:30,604 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:30,605 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:30,608 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:30,609 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:39:30,614 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:30,614 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:39:30,620 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:30,620 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:30,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:39:30,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:30,654 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:30,654 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:30,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:39:30,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:30,656 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:30,657 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:30,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:39:30,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:30,669 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:30,670 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:30,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2021-02-23 22:39:30,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:30,681 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:30,681 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:30,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2021-02-23 22:39:30,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:30,683 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:30,683 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:30,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2021-02-23 22:39:30,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:30,686 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:30,686 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:30,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1431 trivial. 0 not checked. [2021-02-23 22:39:30,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1930590541] [2021-02-23 22:39:30,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 22:39:30,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-23 22:39:30,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831869401] [2021-02-23 22:39:30,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-23 22:39:30,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:39:30,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-23 22:39:30,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-23 22:39:30,720 INFO L87 Difference]: Start difference. First operand 446 states and 557 transitions. Second operand 7 states. [2021-02-23 22:39:31,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:39:31,565 INFO L93 Difference]: Finished difference Result 452 states and 562 transitions. [2021-02-23 22:39:31,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-23 22:39:31,566 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 235 [2021-02-23 22:39:31,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:39:31,569 INFO L225 Difference]: With dead ends: 452 [2021-02-23 22:39:31,569 INFO L226 Difference]: Without dead ends: 440 [2021-02-23 22:39:31,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-02-23 22:39:31,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-02-23 22:39:31,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 440. [2021-02-23 22:39:31,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 440 states. [2021-02-23 22:39:31,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 549 transitions. [2021-02-23 22:39:31,707 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 549 transitions. Word has length 235 [2021-02-23 22:39:31,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:39:31,707 INFO L480 AbstractCegarLoop]: Abstraction has 440 states and 549 transitions. [2021-02-23 22:39:31,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-23 22:39:31,708 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 549 transitions. [2021-02-23 22:39:31,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-02-23 22:39:31,709 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:39:31,709 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 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] [2021-02-23 22:39:31,709 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-02-23 22:39:31,710 INFO L428 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:39:31,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:39:31,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1599673789, now seen corresponding path program 1 times [2021-02-23 22:39:31,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:39:31,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662597103] [2021-02-23 22:39:31,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:39:31,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:31,745 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:31,746 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:31,746 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:31,747 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:31,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:39:31,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:31,769 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:31,770 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:31,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:39:31,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:31,783 WARN L141 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size [2021-02-23 22:39:31,784 WARN L147 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size 7 [2021-02-23 22:39:31,791 WARN L141 QuantifierPusher]: treesize reduction 5, result has 85.3 percent of original size [2021-02-23 22:39:31,793 WARN L147 QuantifierPusher]: treesize reduction 5, result has 85.3 percent of original size 29 [2021-02-23 22:39:31,817 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:31,817 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 22:39:31,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-02-23 22:39:31,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:31,840 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:31,840 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:31,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2021-02-23 22:39:31,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:31,852 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:31,852 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:31,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2021-02-23 22:39:31,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:31,854 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:31,855 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:31,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2021-02-23 22:39:31,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:31,857 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:31,858 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:31,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1433 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 1408 trivial. 0 not checked. [2021-02-23 22:39:31,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662597103] [2021-02-23 22:39:31,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:39:31,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-02-23 22:39:31,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426355921] [2021-02-23 22:39:31,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 22:39:31,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:39:31,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 22:39:31,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 22:39:31,909 INFO L87 Difference]: Start difference. First operand 440 states and 549 transitions. Second operand 6 states. [2021-02-23 22:39:32,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:39:32,649 INFO L93 Difference]: Finished difference Result 699 states and 876 transitions. [2021-02-23 22:39:32,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-23 22:39:32,655 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 238 [2021-02-23 22:39:32,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:39:32,658 INFO L225 Difference]: With dead ends: 699 [2021-02-23 22:39:32,658 INFO L226 Difference]: Without dead ends: 288 [2021-02-23 22:39:32,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-02-23 22:39:32,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-02-23 22:39:32,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 271. [2021-02-23 22:39:32,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2021-02-23 22:39:32,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 335 transitions. [2021-02-23 22:39:32,757 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 335 transitions. Word has length 238 [2021-02-23 22:39:32,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:39:32,757 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 335 transitions. [2021-02-23 22:39:32,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 22:39:32,757 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 335 transitions. [2021-02-23 22:39:32,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-02-23 22:39:32,759 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:39:32,759 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:39:32,759 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-02-23 22:39:32,759 INFO L428 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:39:32,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:39:32,760 INFO L82 PathProgramCache]: Analyzing trace with hash -990425428, now seen corresponding path program 1 times [2021-02-23 22:39:32,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:39:32,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001280555] [2021-02-23 22:39:32,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:39:32,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:32,819 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:32,819 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:32,820 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:32,820 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:32,823 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:32,823 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:32,827 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:32,827 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:32,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:39:32,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:32,852 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:32,853 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:32,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:39:32,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:32,854 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:32,855 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:32,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:39:32,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:32,868 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:32,869 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:32,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2021-02-23 22:39:32,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:32,880 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:32,880 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:32,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2021-02-23 22:39:32,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:32,884 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:32,885 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:32,885 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:32,886 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:39:32,895 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:32,896 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:39:32,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2021-02-23 22:39:32,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:32,923 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:32,924 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:32,924 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:32,924 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:32,934 WARN L141 QuantifierPusher]: treesize reduction 10, result has 79.2 percent of original size [2021-02-23 22:39:32,935 WARN L147 QuantifierPusher]: treesize reduction 10, result has 79.2 percent of original size 38 [2021-02-23 22:39:32,950 WARN L141 QuantifierPusher]: treesize reduction 2, result has 94.7 percent of original size [2021-02-23 22:39:32,950 WARN L147 QuantifierPusher]: treesize reduction 2, result has 94.7 percent of original size 36 [2021-02-23 22:39:32,987 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:32,988 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 22:39:33,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1422 trivial. 0 not checked. [2021-02-23 22:39:33,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001280555] [2021-02-23 22:39:33,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 22:39:33,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-23 22:39:33,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224217631] [2021-02-23 22:39:33,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-23 22:39:33,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:39:33,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-23 22:39:33,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-02-23 22:39:33,056 INFO L87 Difference]: Start difference. First operand 271 states and 335 transitions. Second operand 10 states. [2021-02-23 22:39:34,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:39:34,333 INFO L93 Difference]: Finished difference Result 325 states and 397 transitions. [2021-02-23 22:39:34,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-23 22:39:34,333 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 244 [2021-02-23 22:39:34,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:39:34,335 INFO L225 Difference]: With dead ends: 325 [2021-02-23 22:39:34,335 INFO L226 Difference]: Without dead ends: 306 [2021-02-23 22:39:34,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-02-23 22:39:34,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-02-23 22:39:34,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 277. [2021-02-23 22:39:34,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2021-02-23 22:39:34,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 341 transitions. [2021-02-23 22:39:34,466 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 341 transitions. Word has length 244 [2021-02-23 22:39:34,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:39:34,466 INFO L480 AbstractCegarLoop]: Abstraction has 277 states and 341 transitions. [2021-02-23 22:39:34,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-23 22:39:34,466 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 341 transitions. [2021-02-23 22:39:34,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-02-23 22:39:34,468 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:39:34,468 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 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] [2021-02-23 22:39:34,469 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-02-23 22:39:34,469 INFO L428 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:39:34,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:39:34,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1632536368, now seen corresponding path program 1 times [2021-02-23 22:39:34,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:39:34,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456414281] [2021-02-23 22:39:34,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:39:34,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:34,545 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:34,546 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:34,546 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:34,547 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:34,549 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:34,550 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:34,554 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:34,554 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 22:39:34,564 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.8 percent of original size [2021-02-23 22:39:34,565 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.8 percent of original size 30 [2021-02-23 22:39:34,598 WARN L141 QuantifierPusher]: treesize reduction 1, result has 97.7 percent of original size [2021-02-23 22:39:34,598 WARN L147 QuantifierPusher]: treesize reduction 1, result has 97.7 percent of original size 42 [2021-02-23 22:39:34,611 WARN L141 QuantifierPusher]: treesize reduction 1, result has 98.2 percent of original size [2021-02-23 22:39:34,611 WARN L147 QuantifierPusher]: treesize reduction 1, result has 98.2 percent of original size 54 [2021-02-23 22:39:34,613 WARN L141 QuantifierPusher]: treesize reduction 12, result has 7.7 percent of original size [2021-02-23 22:39:34,614 WARN L147 QuantifierPusher]: treesize reduction 12, result has 7.7 percent of original size 1 [2021-02-23 22:39:34,614 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:34,615 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:34,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:39:34,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:34,643 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:34,643 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:34,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:39:34,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:34,647 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:34,648 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:34,648 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:34,649 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:39:34,661 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:34,661 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:39:34,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:39:34,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:34,693 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:34,694 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:34,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2021-02-23 22:39:34,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:34,706 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:34,707 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:34,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2021-02-23 22:39:34,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:34,711 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:34,712 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:34,712 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:34,713 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:39:34,747 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:34,748 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:39:34,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2021-02-23 22:39:34,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:34,768 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:34,769 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:34,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1415 trivial. 0 not checked. [2021-02-23 22:39:34,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456414281] [2021-02-23 22:39:34,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:39:34,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-02-23 22:39:34,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050212379] [2021-02-23 22:39:34,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-23 22:39:34,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:39:34,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-23 22:39:34,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-02-23 22:39:34,818 INFO L87 Difference]: Start difference. First operand 277 states and 341 transitions. Second operand 11 states. [2021-02-23 22:39:36,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:39:36,257 INFO L93 Difference]: Finished difference Result 342 states and 411 transitions. [2021-02-23 22:39:36,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-23 22:39:36,257 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 248 [2021-02-23 22:39:36,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:39:36,259 INFO L225 Difference]: With dead ends: 342 [2021-02-23 22:39:36,259 INFO L226 Difference]: Without dead ends: 280 [2021-02-23 22:39:36,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-02-23 22:39:36,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-02-23 22:39:36,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 277. [2021-02-23 22:39:36,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2021-02-23 22:39:36,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 341 transitions. [2021-02-23 22:39:36,358 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 341 transitions. Word has length 248 [2021-02-23 22:39:36,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:39:36,358 INFO L480 AbstractCegarLoop]: Abstraction has 277 states and 341 transitions. [2021-02-23 22:39:36,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-23 22:39:36,358 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 341 transitions. [2021-02-23 22:39:36,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-02-23 22:39:36,360 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:39:36,360 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 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] [2021-02-23 22:39:36,360 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-02-23 22:39:36,361 INFO L428 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:39:36,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:39:36,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1975256428, now seen corresponding path program 1 times [2021-02-23 22:39:36,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:39:36,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [613958123] [2021-02-23 22:39:36,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:39:36,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:36,422 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:36,422 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:36,423 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:36,423 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:36,426 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:36,426 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:36,430 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:36,430 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:36,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:39:36,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:36,456 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:36,457 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:36,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:39:36,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:36,459 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:36,459 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:36,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:39:36,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:36,471 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:36,472 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:36,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2021-02-23 22:39:36,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:36,485 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:36,486 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:36,486 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:36,487 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:39:36,496 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:36,496 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:39:36,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2021-02-23 22:39:36,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:36,509 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:36,510 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:36,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2021-02-23 22:39:36,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:36,526 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:36,527 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:36,536 WARN L141 QuantifierPusher]: treesize reduction 11, result has 84.9 percent of original size [2021-02-23 22:39:36,537 WARN L147 QuantifierPusher]: treesize reduction 11, result has 84.9 percent of original size 62 [2021-02-23 22:39:36,586 WARN L141 QuantifierPusher]: treesize reduction 2, result has 96.3 percent of original size [2021-02-23 22:39:36,586 WARN L147 QuantifierPusher]: treesize reduction 2, result has 96.3 percent of original size 52 [2021-02-23 22:39:36,641 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-23 22:39:36,642 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-23 22:39:36,672 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:36,672 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 22:39:36,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1433 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1424 trivial. 0 not checked. [2021-02-23 22:39:36,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [613958123] [2021-02-23 22:39:36,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:39:36,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-02-23 22:39:36,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091405384] [2021-02-23 22:39:36,804 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-23 22:39:36,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:39:36,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-23 22:39:36,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-02-23 22:39:36,805 INFO L87 Difference]: Start difference. First operand 277 states and 341 transitions. Second operand 12 states. [2021-02-23 22:39:38,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:39:38,370 INFO L93 Difference]: Finished difference Result 339 states and 410 transitions. [2021-02-23 22:39:38,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-23 22:39:38,370 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 249 [2021-02-23 22:39:38,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:39:38,372 INFO L225 Difference]: With dead ends: 339 [2021-02-23 22:39:38,372 INFO L226 Difference]: Without dead ends: 327 [2021-02-23 22:39:38,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-02-23 22:39:38,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-02-23 22:39:38,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 319. [2021-02-23 22:39:38,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2021-02-23 22:39:38,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 390 transitions. [2021-02-23 22:39:38,502 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 390 transitions. Word has length 249 [2021-02-23 22:39:38,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:39:38,502 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 390 transitions. [2021-02-23 22:39:38,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-23 22:39:38,503 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 390 transitions. [2021-02-23 22:39:38,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-02-23 22:39:38,504 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:39:38,505 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 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] [2021-02-23 22:39:38,505 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-02-23 22:39:38,505 INFO L428 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:39:38,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:39:38,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1900854499, now seen corresponding path program 1 times [2021-02-23 22:39:38,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:39:38,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57898577] [2021-02-23 22:39:38,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:39:38,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:38,555 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:38,555 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:38,556 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:38,556 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:38,559 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:38,559 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:38,563 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:38,563 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:38,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:39:38,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:38,590 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:38,590 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:38,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:39:38,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:38,592 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:38,593 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:38,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:39:38,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:38,607 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:38,607 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:38,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2021-02-23 22:39:38,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:38,621 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:38,621 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:38,622 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:38,622 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:39:38,634 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:38,635 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:39:38,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2021-02-23 22:39:38,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:38,647 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:38,648 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:38,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2021-02-23 22:39:38,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:38,663 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:38,664 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:38,673 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:38,673 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:39:38,689 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.8 percent of original size [2021-02-23 22:39:38,690 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.8 percent of original size 30 [2021-02-23 22:39:38,720 WARN L141 QuantifierPusher]: treesize reduction 2, result has 94.9 percent of original size [2021-02-23 22:39:38,721 WARN L147 QuantifierPusher]: treesize reduction 2, result has 94.9 percent of original size 37 [2021-02-23 22:39:38,757 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:38,758 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 22:39:38,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1433 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1424 trivial. 0 not checked. [2021-02-23 22:39:38,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57898577] [2021-02-23 22:39:38,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:39:38,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-02-23 22:39:38,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726007337] [2021-02-23 22:39:38,832 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-23 22:39:38,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:39:38,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-23 22:39:38,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-02-23 22:39:38,833 INFO L87 Difference]: Start difference. First operand 319 states and 390 transitions. Second operand 12 states. [2021-02-23 22:39:40,134 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-02-23 22:39:40,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:39:40,654 INFO L93 Difference]: Finished difference Result 331 states and 401 transitions. [2021-02-23 22:39:40,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-23 22:39:40,655 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 252 [2021-02-23 22:39:40,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:39:40,657 INFO L225 Difference]: With dead ends: 331 [2021-02-23 22:39:40,657 INFO L226 Difference]: Without dead ends: 305 [2021-02-23 22:39:40,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-02-23 22:39:40,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-02-23 22:39:40,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 276. [2021-02-23 22:39:40,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2021-02-23 22:39:40,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 313 transitions. [2021-02-23 22:39:40,798 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 313 transitions. Word has length 252 [2021-02-23 22:39:40,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:39:40,798 INFO L480 AbstractCegarLoop]: Abstraction has 276 states and 313 transitions. [2021-02-23 22:39:40,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-23 22:39:40,798 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 313 transitions. [2021-02-23 22:39:40,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-02-23 22:39:40,799 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:39:40,800 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 3, 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] [2021-02-23 22:39:40,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-02-23 22:39:40,800 INFO L428 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:39:40,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:39:40,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1097570448, now seen corresponding path program 1 times [2021-02-23 22:39:40,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:39:40,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [84662350] [2021-02-23 22:39:40,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:39:40,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:40,862 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:40,863 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:40,863 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:40,863 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:40,866 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:40,867 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:40,871 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:40,872 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 22:39:40,878 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:40,878 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-02-23 22:39:40,898 WARN L141 QuantifierPusher]: treesize reduction 12, result has 7.7 percent of original size [2021-02-23 22:39:40,898 WARN L147 QuantifierPusher]: treesize reduction 12, result has 7.7 percent of original size 1 [2021-02-23 22:39:40,899 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:40,899 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:40,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:39:40,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:40,927 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:40,928 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:40,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 22:39:40,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:40,932 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:40,932 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:40,933 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:40,933 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:39:40,944 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:40,945 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 22:39:40,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-23 22:39:40,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:40,974 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:40,974 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:40,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2021-02-23 22:39:40,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:40,988 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:40,988 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:40,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2021-02-23 22:39:40,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:40,992 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:40,992 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:40,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2021-02-23 22:39:41,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:39:41,022 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:41,022 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:39:41,023 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:41,023 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 22:39:41,033 WARN L141 QuantifierPusher]: treesize reduction 10, result has 68.8 percent of original size [2021-02-23 22:39:41,035 WARN L147 QuantifierPusher]: treesize reduction 10, result has 68.8 percent of original size 22 [2021-02-23 22:39:41,051 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.2 percent of original size [2021-02-23 22:39:41,052 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.2 percent of original size 20 [2021-02-23 22:39:41,083 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:39:41,084 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 22:39:41,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1436 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1427 trivial. 0 not checked. [2021-02-23 22:39:41,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [84662350] [2021-02-23 22:39:41,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-23 22:39:41,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-02-23 22:39:41,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461785937] [2021-02-23 22:39:41,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-23 22:39:41,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:39:41,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-23 22:39:41,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-02-23 22:39:41,167 INFO L87 Difference]: Start difference. First operand 276 states and 313 transitions. Second operand 11 states. [2021-02-23 22:39:42,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:39:42,403 INFO L93 Difference]: Finished difference Result 305 states and 346 transitions. [2021-02-23 22:39:42,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-23 22:39:42,404 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 253 [2021-02-23 22:39:42,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:39:42,405 INFO L225 Difference]: With dead ends: 305 [2021-02-23 22:39:42,405 INFO L226 Difference]: Without dead ends: 0 [2021-02-23 22:39:42,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-02-23 22:39:42,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-23 22:39:42,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-23 22:39:42,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-23 22:39:42,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-23 22:39:42,408 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 253 [2021-02-23 22:39:42,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:39:42,408 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-23 22:39:42,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-23 22:39:42,409 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-23 22:39:42,409 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-23 22:39:42,409 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-02-23 22:39:42,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-23 22:39:43,011 WARN L202 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 82 [2021-02-23 22:39:43,749 WARN L202 SmtUtils]: Spent 731.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 35 [2021-02-23 22:39:43,876 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 35 [2021-02-23 22:39:44,260 WARN L202 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 81 [2021-02-23 22:39:44,883 WARN L202 SmtUtils]: Spent 622.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 35 [2021-02-23 22:39:45,309 WARN L202 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 35 [2021-02-23 22:39:45,440 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 35 [2021-02-23 22:39:46,060 WARN L202 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 35 [2021-02-23 22:39:46,292 WARN L202 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 35 [2021-02-23 22:39:46,571 WARN L202 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 35 [2021-02-23 22:39:46,907 WARN L202 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 35 [2021-02-23 22:39:47,312 WARN L202 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 35 [2021-02-23 22:39:47,522 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 82 [2021-02-23 22:39:47,708 WARN L202 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 35 [2021-02-23 22:39:47,891 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 82 [2021-02-23 22:39:48,222 WARN L202 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 35 [2021-02-23 22:39:48,430 WARN L202 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 35 [2021-02-23 22:39:48,547 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 35 [2021-02-23 22:39:49,279 WARN L202 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 44 [2021-02-23 22:40:26,236 WARN L202 SmtUtils]: Spent 36.95 s on a formula simplification. DAG size of input: 1316 DAG size of output: 730 [2021-02-23 22:41:43,740 WARN L202 SmtUtils]: Spent 1.29 m on a formula simplification. DAG size of input: 1247 DAG size of output: 44 [2021-02-23 22:41:49,560 WARN L202 SmtUtils]: Spent 5.82 s on a formula simplification. DAG size of input: 492 DAG size of output: 42 [2021-02-23 22:42:49,348 WARN L202 SmtUtils]: Spent 59.78 s on a formula simplification. DAG size of input: 1646 DAG size of output: 1074 [2021-02-23 22:44:32,443 WARN L202 SmtUtils]: Spent 1.72 m on a formula simplification. DAG size of input: 1288 DAG size of output: 44 [2021-02-23 22:45:28,580 WARN L202 SmtUtils]: Spent 56.13 s on a formula simplification. DAG size of input: 1101 DAG size of output: 45 [2021-02-23 22:45:37,769 WARN L202 SmtUtils]: Spent 9.19 s on a formula simplification. DAG size of input: 598 DAG size of output: 42 [2021-02-23 22:47:19,358 WARN L202 SmtUtils]: Spent 1.69 m on a formula simplification. DAG size of input: 1318 DAG size of output: 49 [2021-02-23 22:47:22,036 WARN L202 SmtUtils]: Spent 2.68 s on a formula simplification. DAG size of input: 394 DAG size of output: 42 [2021-02-23 22:47:43,083 WARN L202 SmtUtils]: Spent 21.04 s on a formula simplification. DAG size of input: 771 DAG size of output: 45 [2021-02-23 22:48:13,990 WARN L202 SmtUtils]: Spent 30.90 s on a formula simplification. DAG size of input: 897 DAG size of output: 45 [2021-02-23 22:48:20,735 WARN L202 SmtUtils]: Spent 6.74 s on a formula simplification. DAG size of input: 544 DAG size of output: 42 [2021-02-23 22:49:29,011 WARN L202 SmtUtils]: Spent 1.14 m on a formula simplification. DAG size of input: 1173 DAG size of output: 45 [2021-02-23 22:49:32,845 WARN L202 SmtUtils]: Spent 3.83 s on a formula simplification. DAG size of input: 442 DAG size of output: 42