/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf -i ../../../trunk/examples/svcomp/locks/test_locks_11.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 04:17:08,749 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 04:17:08,752 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 04:17:08,789 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 04:17:08,802 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 04:17:08,803 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 04:17:08,805 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 04:17:08,806 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 04:17:08,807 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 04:17:08,809 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 04:17:08,811 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 04:17:08,813 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 04:17:08,815 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 04:17:08,820 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 04:17:08,823 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 04:17:08,825 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 04:17:08,830 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 04:17:08,857 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-24 04:17:08,858 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-24 04:17:08,860 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-24 04:17:08,862 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-24 04:17:08,888 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 04:17:08,888 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 04:17:08,894 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 04:17:08,895 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 04:17:08,895 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 04:17:08,895 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 04:17:08,896 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 04:17:08,896 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 04:17:08,896 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 04:17:08,897 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 04:17:08,898 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 04:17:08,898 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 04:17:08,899 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 04:17:08,899 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 04:17:08,899 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 04:17:08,900 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 04:17:08,900 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 04:17:08,900 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 04:17:08,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 04:17:08,901 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 04:17:08,901 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 04:17:08,901 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 04:17:08,902 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-24 04:17:08,902 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-24 04:17:09,379 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 04:17:09,412 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 04:17:09,416 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 04:17:09,417 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 04:17:09,418 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 04:17:09,419 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_11.c [2021-02-24 04:17:09,511 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21367b4b7/d4649a991034467bb0e736f08fb2cca6/FLAGe0c172226 [2021-02-24 04:17:10,164 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 04:17:10,165 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_11.c [2021-02-24 04:17:10,176 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21367b4b7/d4649a991034467bb0e736f08fb2cca6/FLAGe0c172226 [2021-02-24 04:17:10,528 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21367b4b7/d4649a991034467bb0e736f08fb2cca6 [2021-02-24 04:17:10,532 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 04:17:10,552 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 04:17:10,558 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 04:17:10,558 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 04:17:10,564 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 04:17:10,565 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:17:10" (1/1) ... [2021-02-24 04:17:10,568 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a410910 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:17:10, skipping insertion in model container [2021-02-24 04:17:10,568 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:17:10" (1/1) ... [2021-02-24 04:17:10,579 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 04:17:10,618 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 04:17:10,910 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_11.c[4246,4259] [2021-02-24 04:17:10,919 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:17:10,935 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 04:17:10,994 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_11.c[4246,4259] [2021-02-24 04:17:10,997 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:17:11,022 INFO L208 MainTranslator]: Completed translation [2021-02-24 04:17:11,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:17:11 WrapperNode [2021-02-24 04:17:11,024 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 04:17:11,026 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 04:17:11,026 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 04:17:11,027 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 04:17:11,043 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:17:11" (1/1) ... [2021-02-24 04:17:11,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:17:11" (1/1) ... [2021-02-24 04:17:11,065 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:17:11" (1/1) ... [2021-02-24 04:17:11,065 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:17:11" (1/1) ... [2021-02-24 04:17:11,084 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:17:11" (1/1) ... [2021-02-24 04:17:11,092 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:17:11" (1/1) ... [2021-02-24 04:17:11,095 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:17:11" (1/1) ... [2021-02-24 04:17:11,098 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 04:17:11,099 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 04:17:11,099 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 04:17:11,100 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 04:17:11,101 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:17:11" (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 [2021-02-24 04:17:11,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 04:17:11,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 04:17:11,212 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 04:17:11,212 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 04:17:11,212 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 04:17:11,212 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 04:17:11,213 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 04:17:11,213 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 04:17:11,213 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-24 04:17:11,213 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 04:17:11,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 04:17:11,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 04:17:11,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 04:17:11,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 04:17:11,214 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 04:17:11,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 04:17:11,948 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 04:17:11,949 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-24 04:17:11,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:17:11 BoogieIcfgContainer [2021-02-24 04:17:11,951 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 04:17:11,953 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 04:17:11,954 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 04:17:11,957 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 04:17:11,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:17:10" (1/3) ... [2021-02-24 04:17:11,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1604f48e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:17:11, skipping insertion in model container [2021-02-24 04:17:11,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:17:11" (2/3) ... [2021-02-24 04:17:11,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1604f48e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:17:11, skipping insertion in model container [2021-02-24 04:17:11,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:17:11" (3/3) ... [2021-02-24 04:17:11,961 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_11.c [2021-02-24 04:17:11,968 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 04:17:11,974 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 04:17:11,994 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 04:17:12,020 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 04:17:12,020 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 04:17:12,020 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-24 04:17:12,020 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 04:17:12,020 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 04:17:12,021 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 04:17:12,021 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 04:17:12,021 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 04:17:12,041 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states. [2021-02-24 04:17:12,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-02-24 04:17:12,054 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:17:12,055 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:17:12,055 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:17:12,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:17:12,062 INFO L82 PathProgramCache]: Analyzing trace with hash -898561761, now seen corresponding path program 1 times [2021-02-24 04:17:12,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:17:12,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338497621] [2021-02-24 04:17:12,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:17:12,158 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:17:12,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:17:12,455 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:12,457 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:12,459 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:12,460 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:17:12,480 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:12,481 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:12,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:17:12,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:17:12,608 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:12,609 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:12,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:17:12,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338497621] [2021-02-24 04:17:12,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:17:12,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-24 04:17:12,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272295336] [2021-02-24 04:17:12,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-24 04:17:12,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:17:12,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-24 04:17:12,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-24 04:17:12,665 INFO L87 Difference]: Start difference. First operand 137 states. Second operand 4 states. [2021-02-24 04:17:13,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:17:13,404 INFO L93 Difference]: Finished difference Result 288 states and 393 transitions. [2021-02-24 04:17:13,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-24 04:17:13,406 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 87 [2021-02-24 04:17:13,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:17:13,421 INFO L225 Difference]: With dead ends: 288 [2021-02-24 04:17:13,421 INFO L226 Difference]: Without dead ends: 200 [2021-02-24 04:17:13,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-24 04:17:13,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-02-24 04:17:13,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 198. [2021-02-24 04:17:13,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2021-02-24 04:17:13,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 260 transitions. [2021-02-24 04:17:13,519 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 260 transitions. Word has length 87 [2021-02-24 04:17:13,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:17:13,520 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 260 transitions. [2021-02-24 04:17:13,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-24 04:17:13,520 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 260 transitions. [2021-02-24 04:17:13,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-02-24 04:17:13,524 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:17:13,525 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:17:13,525 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 04:17:13,525 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:17:13,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:17:13,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1510688528, now seen corresponding path program 1 times [2021-02-24 04:17:13,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:17:13,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [50716739] [2021-02-24 04:17:13,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:17:13,531 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:17:13,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:17:13,606 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:13,607 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:13,608 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:13,609 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:17:13,615 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:13,616 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:13,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:17:13,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:17:13,678 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:13,679 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:13,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:17:13,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [50716739] [2021-02-24 04:17:13,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:17:13,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-24 04:17:13,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295985079] [2021-02-24 04:17:13,698 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-24 04:17:13,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:17:13,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-24 04:17:13,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-24 04:17:13,699 INFO L87 Difference]: Start difference. First operand 198 states and 260 transitions. Second operand 4 states. [2021-02-24 04:17:14,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:17:14,290 INFO L93 Difference]: Finished difference Result 238 states and 318 transitions. [2021-02-24 04:17:14,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-24 04:17:14,291 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2021-02-24 04:17:14,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:17:14,294 INFO L225 Difference]: With dead ends: 238 [2021-02-24 04:17:14,294 INFO L226 Difference]: Without dead ends: 236 [2021-02-24 04:17:14,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-24 04:17:14,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-02-24 04:17:14,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 198. [2021-02-24 04:17:14,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2021-02-24 04:17:14,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 259 transitions. [2021-02-24 04:17:14,344 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 259 transitions. Word has length 88 [2021-02-24 04:17:14,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:17:14,344 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 259 transitions. [2021-02-24 04:17:14,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-24 04:17:14,345 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 259 transitions. [2021-02-24 04:17:14,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-02-24 04:17:14,347 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:17:14,347 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:17:14,348 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 04:17:14,348 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:17:14,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:17:14,349 INFO L82 PathProgramCache]: Analyzing trace with hash -2085367227, now seen corresponding path program 1 times [2021-02-24 04:17:14,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:17:14,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1510493889] [2021-02-24 04:17:14,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:17:14,354 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:17:14,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:17:14,459 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:14,460 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:14,461 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:14,462 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:17:14,468 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:14,469 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:14,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:17:14,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:17:14,519 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:14,520 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:14,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:17:14,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1510493889] [2021-02-24 04:17:14,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:17:14,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-24 04:17:14,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043109797] [2021-02-24 04:17:14,533 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-24 04:17:14,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:17:14,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-24 04:17:14,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-24 04:17:14,534 INFO L87 Difference]: Start difference. First operand 198 states and 259 transitions. Second operand 4 states. [2021-02-24 04:17:15,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:17:15,220 INFO L93 Difference]: Finished difference Result 474 states and 655 transitions. [2021-02-24 04:17:15,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-24 04:17:15,222 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2021-02-24 04:17:15,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:17:15,229 INFO L225 Difference]: With dead ends: 474 [2021-02-24 04:17:15,229 INFO L226 Difference]: Without dead ends: 333 [2021-02-24 04:17:15,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-24 04:17:15,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-02-24 04:17:15,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 331. [2021-02-24 04:17:15,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2021-02-24 04:17:15,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 448 transitions. [2021-02-24 04:17:15,315 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 448 transitions. Word has length 88 [2021-02-24 04:17:15,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:17:15,316 INFO L480 AbstractCegarLoop]: Abstraction has 331 states and 448 transitions. [2021-02-24 04:17:15,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-24 04:17:15,317 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 448 transitions. [2021-02-24 04:17:15,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-02-24 04:17:15,326 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:17:15,326 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:17:15,327 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-24 04:17:15,327 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:17:15,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:17:15,328 INFO L82 PathProgramCache]: Analyzing trace with hash 348430457, now seen corresponding path program 1 times [2021-02-24 04:17:15,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:17:15,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1068072904] [2021-02-24 04:17:15,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:17:15,337 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:17:15,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:17:15,408 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:15,409 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:15,410 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:15,411 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:17:15,414 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:15,415 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:15,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:17:15,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:17:15,471 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:15,472 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:15,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:17:15,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1068072904] [2021-02-24 04:17:15,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:17:15,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-24 04:17:15,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586454691] [2021-02-24 04:17:15,485 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-24 04:17:15,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:17:15,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-24 04:17:15,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-24 04:17:15,488 INFO L87 Difference]: Start difference. First operand 331 states and 448 transitions. Second operand 4 states. [2021-02-24 04:17:15,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:17:15,883 INFO L93 Difference]: Finished difference Result 403 states and 554 transitions. [2021-02-24 04:17:15,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-24 04:17:15,884 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2021-02-24 04:17:15,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:17:15,887 INFO L225 Difference]: With dead ends: 403 [2021-02-24 04:17:15,887 INFO L226 Difference]: Without dead ends: 401 [2021-02-24 04:17:15,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-24 04:17:15,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-02-24 04:17:15,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 331. [2021-02-24 04:17:15,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2021-02-24 04:17:15,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 446 transitions. [2021-02-24 04:17:15,951 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 446 transitions. Word has length 89 [2021-02-24 04:17:15,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:17:15,953 INFO L480 AbstractCegarLoop]: Abstraction has 331 states and 446 transitions. [2021-02-24 04:17:15,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-24 04:17:15,953 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 446 transitions. [2021-02-24 04:17:15,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-02-24 04:17:15,958 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:17:15,959 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:17:15,959 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-24 04:17:15,960 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:17:15,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:17:15,960 INFO L82 PathProgramCache]: Analyzing trace with hash -221630637, now seen corresponding path program 1 times [2021-02-24 04:17:15,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:17:15,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [434440720] [2021-02-24 04:17:15,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:17:15,965 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:17:16,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:17:16,059 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:16,060 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:16,062 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:16,063 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:17:16,068 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:16,070 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:16,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:17:16,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:17:16,109 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:16,111 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:16,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:17:16,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [434440720] [2021-02-24 04:17:16,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:17:16,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-24 04:17:16,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127990347] [2021-02-24 04:17:16,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-24 04:17:16,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:17:16,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-24 04:17:16,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-24 04:17:16,127 INFO L87 Difference]: Start difference. First operand 331 states and 446 transitions. Second operand 4 states. [2021-02-24 04:17:16,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:17:16,567 INFO L93 Difference]: Finished difference Result 867 states and 1208 transitions. [2021-02-24 04:17:16,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-24 04:17:16,568 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2021-02-24 04:17:16,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:17:16,572 INFO L225 Difference]: With dead ends: 867 [2021-02-24 04:17:16,572 INFO L226 Difference]: Without dead ends: 593 [2021-02-24 04:17:16,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-24 04:17:16,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-02-24 04:17:16,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 591. [2021-02-24 04:17:16,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2021-02-24 04:17:16,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 810 transitions. [2021-02-24 04:17:16,670 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 810 transitions. Word has length 89 [2021-02-24 04:17:16,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:17:16,670 INFO L480 AbstractCegarLoop]: Abstraction has 591 states and 810 transitions. [2021-02-24 04:17:16,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-24 04:17:16,671 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 810 transitions. [2021-02-24 04:17:16,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-02-24 04:17:16,672 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:17:16,672 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:17:16,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-24 04:17:16,673 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:17:16,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:17:16,673 INFO L82 PathProgramCache]: Analyzing trace with hash 2146544516, now seen corresponding path program 1 times [2021-02-24 04:17:16,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:17:16,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2074550470] [2021-02-24 04:17:16,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:17:16,676 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:17:16,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:17:16,704 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:16,705 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:16,706 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:16,706 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:17:16,709 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:16,711 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:16,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:17:16,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:17:16,754 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:16,755 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:16,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:17:16,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2074550470] [2021-02-24 04:17:16,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:17:16,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-24 04:17:16,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187215060] [2021-02-24 04:17:16,766 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-24 04:17:16,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:17:16,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-24 04:17:16,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-24 04:17:16,767 INFO L87 Difference]: Start difference. First operand 591 states and 810 transitions. Second operand 4 states. [2021-02-24 04:17:17,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:17:17,209 INFO L93 Difference]: Finished difference Result 723 states and 1004 transitions. [2021-02-24 04:17:17,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-24 04:17:17,210 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 90 [2021-02-24 04:17:17,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:17:17,214 INFO L225 Difference]: With dead ends: 723 [2021-02-24 04:17:17,215 INFO L226 Difference]: Without dead ends: 721 [2021-02-24 04:17:17,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-24 04:17:17,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-02-24 04:17:17,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 591. [2021-02-24 04:17:17,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2021-02-24 04:17:17,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 806 transitions. [2021-02-24 04:17:17,306 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 806 transitions. Word has length 90 [2021-02-24 04:17:17,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:17:17,306 INFO L480 AbstractCegarLoop]: Abstraction has 591 states and 806 transitions. [2021-02-24 04:17:17,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-24 04:17:17,307 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 806 transitions. [2021-02-24 04:17:17,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-02-24 04:17:17,308 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:17:17,308 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:17:17,309 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-24 04:17:17,309 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:17:17,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:17:17,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1719629177, now seen corresponding path program 1 times [2021-02-24 04:17:17,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:17:17,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931069330] [2021-02-24 04:17:17,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:17:17,312 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:17:17,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:17:17,339 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:17,340 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:17,340 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:17,341 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:17:17,344 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:17,344 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:17,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:17:17,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:17:17,373 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:17,373 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:17,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:17:17,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931069330] [2021-02-24 04:17:17,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:17:17,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-24 04:17:17,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215548567] [2021-02-24 04:17:17,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-24 04:17:17,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:17:17,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-24 04:17:17,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-24 04:17:17,385 INFO L87 Difference]: Start difference. First operand 591 states and 806 transitions. Second operand 4 states. [2021-02-24 04:17:17,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:17:17,847 INFO L93 Difference]: Finished difference Result 1635 states and 2272 transitions. [2021-02-24 04:17:17,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-24 04:17:17,847 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 90 [2021-02-24 04:17:17,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:17:17,854 INFO L225 Difference]: With dead ends: 1635 [2021-02-24 04:17:17,854 INFO L226 Difference]: Without dead ends: 1101 [2021-02-24 04:17:17,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-24 04:17:17,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2021-02-24 04:17:18,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 1099. [2021-02-24 04:17:18,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1099 states. [2021-02-24 04:17:18,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 1506 transitions. [2021-02-24 04:17:18,038 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 1506 transitions. Word has length 90 [2021-02-24 04:17:18,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:17:18,038 INFO L480 AbstractCegarLoop]: Abstraction has 1099 states and 1506 transitions. [2021-02-24 04:17:18,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-24 04:17:18,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 1506 transitions. [2021-02-24 04:17:18,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-02-24 04:17:18,040 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:17:18,041 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:17:18,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-24 04:17:18,041 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:17:18,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:17:18,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1769141639, now seen corresponding path program 1 times [2021-02-24 04:17:18,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:17:18,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359806585] [2021-02-24 04:17:18,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:17:18,045 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:17:18,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:17:18,067 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:18,067 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:18,068 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:18,069 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:17:18,076 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:18,077 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:18,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:17:18,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:17:18,105 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:18,106 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:18,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:17:18,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359806585] [2021-02-24 04:17:18,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:17:18,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-24 04:17:18,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357841541] [2021-02-24 04:17:18,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-24 04:17:18,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:17:18,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-24 04:17:18,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-24 04:17:18,116 INFO L87 Difference]: Start difference. First operand 1099 states and 1506 transitions. Second operand 4 states. [2021-02-24 04:17:18,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:17:18,745 INFO L93 Difference]: Finished difference Result 3135 states and 4340 transitions. [2021-02-24 04:17:18,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-24 04:17:18,746 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2021-02-24 04:17:18,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:17:18,758 INFO L225 Difference]: With dead ends: 3135 [2021-02-24 04:17:18,758 INFO L226 Difference]: Without dead ends: 2093 [2021-02-24 04:17:18,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-24 04:17:18,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2093 states. [2021-02-24 04:17:19,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2093 to 2091. [2021-02-24 04:17:19,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2091 states. [2021-02-24 04:17:19,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2091 states to 2091 states and 2858 transitions. [2021-02-24 04:17:19,136 INFO L78 Accepts]: Start accepts. Automaton has 2091 states and 2858 transitions. Word has length 91 [2021-02-24 04:17:19,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:17:19,137 INFO L480 AbstractCegarLoop]: Abstraction has 2091 states and 2858 transitions. [2021-02-24 04:17:19,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-24 04:17:19,137 INFO L276 IsEmpty]: Start isEmpty. Operand 2091 states and 2858 transitions. [2021-02-24 04:17:19,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-02-24 04:17:19,140 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:17:19,140 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:17:19,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-24 04:17:19,141 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:17:19,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:17:19,141 INFO L82 PathProgramCache]: Analyzing trace with hash 2053505869, now seen corresponding path program 1 times [2021-02-24 04:17:19,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:17:19,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468321988] [2021-02-24 04:17:19,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:17:19,145 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:17:19,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:17:19,176 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:19,181 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:19,182 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:19,182 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:17:19,186 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:19,187 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:19,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:17:19,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:17:19,222 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:19,223 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:19,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:17:19,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468321988] [2021-02-24 04:17:19,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:17:19,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-24 04:17:19,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443831823] [2021-02-24 04:17:19,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-24 04:17:19,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:17:19,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-24 04:17:19,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-24 04:17:19,234 INFO L87 Difference]: Start difference. First operand 2091 states and 2858 transitions. Second operand 4 states. [2021-02-24 04:17:19,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:17:19,917 INFO L93 Difference]: Finished difference Result 2559 states and 3532 transitions. [2021-02-24 04:17:19,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-24 04:17:19,918 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2021-02-24 04:17:19,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:17:19,933 INFO L225 Difference]: With dead ends: 2559 [2021-02-24 04:17:19,933 INFO L226 Difference]: Without dead ends: 2557 [2021-02-24 04:17:19,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-24 04:17:19,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2557 states. [2021-02-24 04:17:20,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2557 to 2091. [2021-02-24 04:17:20,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2091 states. [2021-02-24 04:17:20,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2091 states to 2091 states and 2842 transitions. [2021-02-24 04:17:20,279 INFO L78 Accepts]: Start accepts. Automaton has 2091 states and 2842 transitions. Word has length 91 [2021-02-24 04:17:20,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:17:20,279 INFO L480 AbstractCegarLoop]: Abstraction has 2091 states and 2842 transitions. [2021-02-24 04:17:20,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-24 04:17:20,279 INFO L276 IsEmpty]: Start isEmpty. Operand 2091 states and 2842 transitions. [2021-02-24 04:17:20,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-02-24 04:17:20,282 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:17:20,282 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:17:20,283 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-24 04:17:20,283 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:17:20,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:17:20,284 INFO L82 PathProgramCache]: Analyzing trace with hash -830691816, now seen corresponding path program 1 times [2021-02-24 04:17:20,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:17:20,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850587664] [2021-02-24 04:17:20,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:17:20,286 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:17:20,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:17:20,309 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:20,309 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:20,310 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:20,311 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:17:20,314 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:20,314 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:20,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:17:20,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:17:20,343 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:20,343 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:20,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:17:20,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [850587664] [2021-02-24 04:17:20,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:17:20,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-24 04:17:20,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334950676] [2021-02-24 04:17:20,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-24 04:17:20,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:17:20,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-24 04:17:20,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-24 04:17:20,398 INFO L87 Difference]: Start difference. First operand 2091 states and 2842 transitions. Second operand 4 states. [2021-02-24 04:17:21,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:17:21,288 INFO L93 Difference]: Finished difference Result 2543 states and 3484 transitions. [2021-02-24 04:17:21,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-24 04:17:21,289 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 92 [2021-02-24 04:17:21,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:17:21,304 INFO L225 Difference]: With dead ends: 2543 [2021-02-24 04:17:21,304 INFO L226 Difference]: Without dead ends: 2541 [2021-02-24 04:17:21,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-24 04:17:21,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2541 states. [2021-02-24 04:17:21,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2541 to 2091. [2021-02-24 04:17:21,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2091 states. [2021-02-24 04:17:21,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2091 states to 2091 states and 2826 transitions. [2021-02-24 04:17:21,669 INFO L78 Accepts]: Start accepts. Automaton has 2091 states and 2826 transitions. Word has length 92 [2021-02-24 04:17:21,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:17:21,670 INFO L480 AbstractCegarLoop]: Abstraction has 2091 states and 2826 transitions. [2021-02-24 04:17:21,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-24 04:17:21,670 INFO L276 IsEmpty]: Start isEmpty. Operand 2091 states and 2826 transitions. [2021-02-24 04:17:21,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-02-24 04:17:21,673 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:17:21,673 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:17:21,673 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-24 04:17:21,673 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:17:21,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:17:21,674 INFO L82 PathProgramCache]: Analyzing trace with hash -990938963, now seen corresponding path program 1 times [2021-02-24 04:17:21,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:17:21,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114065857] [2021-02-24 04:17:21,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:17:21,677 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:17:21,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:17:21,699 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:21,700 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:21,700 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:21,701 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:17:21,704 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:21,705 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:21,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:17:21,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:17:21,732 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:21,733 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:21,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:17:21,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114065857] [2021-02-24 04:17:21,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:17:21,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-24 04:17:21,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767361707] [2021-02-24 04:17:21,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-24 04:17:21,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:17:21,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-24 04:17:21,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-24 04:17:21,769 INFO L87 Difference]: Start difference. First operand 2091 states and 2826 transitions. Second operand 4 states. [2021-02-24 04:17:22,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:17:22,912 INFO L93 Difference]: Finished difference Result 6063 states and 8236 transitions. [2021-02-24 04:17:22,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-24 04:17:22,913 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 92 [2021-02-24 04:17:22,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:17:22,937 INFO L225 Difference]: With dead ends: 6063 [2021-02-24 04:17:22,937 INFO L226 Difference]: Without dead ends: 4029 [2021-02-24 04:17:22,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-24 04:17:22,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4029 states. [2021-02-24 04:17:23,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4029 to 4027. [2021-02-24 04:17:23,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4027 states. [2021-02-24 04:17:23,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4027 states to 4027 states and 5402 transitions. [2021-02-24 04:17:23,615 INFO L78 Accepts]: Start accepts. Automaton has 4027 states and 5402 transitions. Word has length 92 [2021-02-24 04:17:23,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:17:23,615 INFO L480 AbstractCegarLoop]: Abstraction has 4027 states and 5402 transitions. [2021-02-24 04:17:23,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-24 04:17:23,615 INFO L276 IsEmpty]: Start isEmpty. Operand 4027 states and 5402 transitions. [2021-02-24 04:17:23,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-02-24 04:17:23,620 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:17:23,620 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:17:23,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-24 04:17:23,620 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:17:23,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:17:23,621 INFO L82 PathProgramCache]: Analyzing trace with hash -46506463, now seen corresponding path program 1 times [2021-02-24 04:17:23,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:17:23,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1232967922] [2021-02-24 04:17:23,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:17:23,624 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:17:23,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:17:23,644 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:23,645 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:23,646 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:23,646 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:17:23,649 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:23,649 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:23,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:17:23,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:17:23,680 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:23,681 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:23,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:17:23,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1232967922] [2021-02-24 04:17:23,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:17:23,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-24 04:17:23,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357569057] [2021-02-24 04:17:23,690 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-24 04:17:23,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:17:23,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-24 04:17:23,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-24 04:17:23,691 INFO L87 Difference]: Start difference. First operand 4027 states and 5402 transitions. Second operand 4 states. [2021-02-24 04:17:24,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:17:24,663 INFO L93 Difference]: Finished difference Result 4863 states and 6556 transitions. [2021-02-24 04:17:24,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-24 04:17:24,664 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 93 [2021-02-24 04:17:24,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:17:24,691 INFO L225 Difference]: With dead ends: 4863 [2021-02-24 04:17:24,691 INFO L226 Difference]: Without dead ends: 4861 [2021-02-24 04:17:24,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-24 04:17:24,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4861 states. [2021-02-24 04:17:25,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4861 to 4027. [2021-02-24 04:17:25,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4027 states. [2021-02-24 04:17:25,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4027 states to 4027 states and 5370 transitions. [2021-02-24 04:17:25,201 INFO L78 Accepts]: Start accepts. Automaton has 4027 states and 5370 transitions. Word has length 93 [2021-02-24 04:17:25,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:17:25,201 INFO L480 AbstractCegarLoop]: Abstraction has 4027 states and 5370 transitions. [2021-02-24 04:17:25,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-24 04:17:25,201 INFO L276 IsEmpty]: Start isEmpty. Operand 4027 states and 5370 transitions. [2021-02-24 04:17:25,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-02-24 04:17:25,214 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:17:25,215 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:17:25,215 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-24 04:17:25,215 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:17:25,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:17:25,216 INFO L82 PathProgramCache]: Analyzing trace with hash -654091333, now seen corresponding path program 1 times [2021-02-24 04:17:25,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:17:25,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [883624298] [2021-02-24 04:17:25,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:17:25,221 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:17:25,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:17:25,244 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:25,245 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:25,245 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:25,246 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:17:25,249 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:25,249 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:25,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:17:25,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:17:25,277 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:25,277 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:25,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:17:25,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [883624298] [2021-02-24 04:17:25,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:17:25,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-24 04:17:25,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617889213] [2021-02-24 04:17:25,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-24 04:17:25,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:17:25,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-24 04:17:25,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-24 04:17:25,288 INFO L87 Difference]: Start difference. First operand 4027 states and 5370 transitions. Second operand 4 states. [2021-02-24 04:17:26,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:17:26,546 INFO L93 Difference]: Finished difference Result 11775 states and 15740 transitions. [2021-02-24 04:17:26,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-24 04:17:26,547 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 93 [2021-02-24 04:17:26,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:17:26,603 INFO L225 Difference]: With dead ends: 11775 [2021-02-24 04:17:26,603 INFO L226 Difference]: Without dead ends: 7805 [2021-02-24 04:17:26,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-24 04:17:26,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7805 states. [2021-02-24 04:17:27,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7805 to 7803. [2021-02-24 04:17:27,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7803 states. [2021-02-24 04:17:27,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7803 states to 7803 states and 10298 transitions. [2021-02-24 04:17:27,976 INFO L78 Accepts]: Start accepts. Automaton has 7803 states and 10298 transitions. Word has length 93 [2021-02-24 04:17:27,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:17:27,976 INFO L480 AbstractCegarLoop]: Abstraction has 7803 states and 10298 transitions. [2021-02-24 04:17:27,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-24 04:17:27,976 INFO L276 IsEmpty]: Start isEmpty. Operand 7803 states and 10298 transitions. [2021-02-24 04:17:27,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-02-24 04:17:27,983 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:17:27,984 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:17:27,984 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-02-24 04:17:27,984 INFO L428 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:17:27,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:17:27,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1506563924, now seen corresponding path program 1 times [2021-02-24 04:17:27,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:17:27,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427195077] [2021-02-24 04:17:27,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:17:27,987 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:17:27,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:17:28,007 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:28,009 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:28,010 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:28,012 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:17:28,015 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:28,016 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:28,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:17:28,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:17:28,044 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:28,044 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:28,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:17:28,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427195077] [2021-02-24 04:17:28,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:17:28,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-24 04:17:28,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705214066] [2021-02-24 04:17:28,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-24 04:17:28,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:17:28,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-24 04:17:28,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-24 04:17:28,054 INFO L87 Difference]: Start difference. First operand 7803 states and 10298 transitions. Second operand 4 states. [2021-02-24 04:17:29,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:17:29,219 INFO L93 Difference]: Finished difference Result 9343 states and 12348 transitions. [2021-02-24 04:17:29,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-24 04:17:29,220 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2021-02-24 04:17:29,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:17:29,248 INFO L225 Difference]: With dead ends: 9343 [2021-02-24 04:17:29,248 INFO L226 Difference]: Without dead ends: 9341 [2021-02-24 04:17:29,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-24 04:17:29,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9341 states. [2021-02-24 04:17:30,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9341 to 7803. [2021-02-24 04:17:30,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7803 states. [2021-02-24 04:17:30,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7803 states to 7803 states and 10234 transitions. [2021-02-24 04:17:30,122 INFO L78 Accepts]: Start accepts. Automaton has 7803 states and 10234 transitions. Word has length 94 [2021-02-24 04:17:30,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:17:30,122 INFO L480 AbstractCegarLoop]: Abstraction has 7803 states and 10234 transitions. [2021-02-24 04:17:30,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-24 04:17:30,123 INFO L276 IsEmpty]: Start isEmpty. Operand 7803 states and 10234 transitions. [2021-02-24 04:17:30,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-02-24 04:17:30,128 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:17:30,128 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:17:30,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-02-24 04:17:30,128 INFO L428 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:17:30,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:17:30,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1198250977, now seen corresponding path program 1 times [2021-02-24 04:17:30,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:17:30,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1610437398] [2021-02-24 04:17:30,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:17:30,131 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:17:30,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:17:30,230 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:30,231 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:30,231 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:30,232 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:17:30,235 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:30,236 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:30,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:17:30,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:17:30,263 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:30,264 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:30,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:17:30,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1610437398] [2021-02-24 04:17:30,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:17:30,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-24 04:17:30,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989888598] [2021-02-24 04:17:30,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-24 04:17:30,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:17:30,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-24 04:17:30,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-24 04:17:30,279 INFO L87 Difference]: Start difference. First operand 7803 states and 10234 transitions. Second operand 4 states. [2021-02-24 04:17:32,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:17:32,484 INFO L93 Difference]: Finished difference Result 22911 states and 30076 transitions. [2021-02-24 04:17:32,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-24 04:17:32,485 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2021-02-24 04:17:32,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:17:32,518 INFO L225 Difference]: With dead ends: 22911 [2021-02-24 04:17:32,518 INFO L226 Difference]: Without dead ends: 15165 [2021-02-24 04:17:32,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-24 04:17:32,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15165 states. [2021-02-24 04:17:34,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15165 to 15163. [2021-02-24 04:17:34,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15163 states. [2021-02-24 04:17:34,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15163 states to 15163 states and 19642 transitions. [2021-02-24 04:17:34,405 INFO L78 Accepts]: Start accepts. Automaton has 15163 states and 19642 transitions. Word has length 94 [2021-02-24 04:17:34,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:17:34,405 INFO L480 AbstractCegarLoop]: Abstraction has 15163 states and 19642 transitions. [2021-02-24 04:17:34,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-24 04:17:34,406 INFO L276 IsEmpty]: Start isEmpty. Operand 15163 states and 19642 transitions. [2021-02-24 04:17:34,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-02-24 04:17:34,417 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:17:34,417 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:17:34,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-02-24 04:17:34,418 INFO L428 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:17:34,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:17:34,418 INFO L82 PathProgramCache]: Analyzing trace with hash 476295413, now seen corresponding path program 1 times [2021-02-24 04:17:34,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:17:34,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [231764893] [2021-02-24 04:17:34,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:17:34,420 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:17:34,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:17:34,439 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:34,440 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:34,440 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:34,441 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:17:34,443 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:34,444 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:34,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:17:34,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:17:34,473 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:34,474 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:34,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:17:34,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [231764893] [2021-02-24 04:17:34,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:17:34,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-24 04:17:34,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239631992] [2021-02-24 04:17:34,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-24 04:17:34,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:17:34,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-24 04:17:34,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-24 04:17:34,483 INFO L87 Difference]: Start difference. First operand 15163 states and 19642 transitions. Second operand 4 states. [2021-02-24 04:17:37,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:17:37,156 INFO L93 Difference]: Finished difference Result 17983 states and 23228 transitions. [2021-02-24 04:17:37,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-24 04:17:37,156 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 95 [2021-02-24 04:17:37,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:17:37,199 INFO L225 Difference]: With dead ends: 17983 [2021-02-24 04:17:37,200 INFO L226 Difference]: Without dead ends: 17981 [2021-02-24 04:17:37,208 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-24 04:17:37,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17981 states. [2021-02-24 04:17:39,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17981 to 15163. [2021-02-24 04:17:39,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15163 states. [2021-02-24 04:17:39,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15163 states to 15163 states and 19514 transitions. [2021-02-24 04:17:39,290 INFO L78 Accepts]: Start accepts. Automaton has 15163 states and 19514 transitions. Word has length 95 [2021-02-24 04:17:39,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:17:39,291 INFO L480 AbstractCegarLoop]: Abstraction has 15163 states and 19514 transitions. [2021-02-24 04:17:39,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-24 04:17:39,291 INFO L276 IsEmpty]: Start isEmpty. Operand 15163 states and 19514 transitions. [2021-02-24 04:17:39,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-02-24 04:17:39,302 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:17:39,302 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:17:39,302 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-02-24 04:17:39,302 INFO L428 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:17:39,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:17:39,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1508679185, now seen corresponding path program 1 times [2021-02-24 04:17:39,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:17:39,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267524667] [2021-02-24 04:17:39,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:17:39,305 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:17:39,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:17:39,322 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:39,323 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:39,324 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:39,324 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:17:39,327 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:39,328 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:39,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:17:39,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:17:39,354 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:39,354 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:39,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:17:39,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267524667] [2021-02-24 04:17:39,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:17:39,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-24 04:17:39,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383576817] [2021-02-24 04:17:39,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-24 04:17:39,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:17:39,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-24 04:17:39,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-24 04:17:39,364 INFO L87 Difference]: Start difference. First operand 15163 states and 19514 transitions. Second operand 4 states. [2021-02-24 04:17:43,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:17:43,221 INFO L93 Difference]: Finished difference Result 44607 states and 57404 transitions. [2021-02-24 04:17:43,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-24 04:17:43,221 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 95 [2021-02-24 04:17:43,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:17:43,278 INFO L225 Difference]: With dead ends: 44607 [2021-02-24 04:17:43,279 INFO L226 Difference]: Without dead ends: 29501 [2021-02-24 04:17:43,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-24 04:17:43,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29501 states. [2021-02-24 04:17:46,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29501 to 29499. [2021-02-24 04:17:46,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29499 states. [2021-02-24 04:17:46,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29499 states to 29499 states and 37434 transitions. [2021-02-24 04:17:46,763 INFO L78 Accepts]: Start accepts. Automaton has 29499 states and 37434 transitions. Word has length 95 [2021-02-24 04:17:46,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:17:46,764 INFO L480 AbstractCegarLoop]: Abstraction has 29499 states and 37434 transitions. [2021-02-24 04:17:46,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-24 04:17:46,764 INFO L276 IsEmpty]: Start isEmpty. Operand 29499 states and 37434 transitions. [2021-02-24 04:17:46,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-02-24 04:17:46,789 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:17:46,790 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:17:46,790 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-02-24 04:17:46,791 INFO L428 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:17:46,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:17:46,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1815393088, now seen corresponding path program 1 times [2021-02-24 04:17:46,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:17:46,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511312549] [2021-02-24 04:17:46,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:17:46,795 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:17:46,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:17:46,821 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:46,822 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:46,822 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:46,823 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:17:46,826 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:46,826 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:46,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:17:46,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:17:46,851 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:46,852 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:46,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:17:46,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511312549] [2021-02-24 04:17:46,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:17:46,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-24 04:17:46,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287866848] [2021-02-24 04:17:46,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-24 04:17:46,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:17:46,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-24 04:17:46,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-24 04:17:46,861 INFO L87 Difference]: Start difference. First operand 29499 states and 37434 transitions. Second operand 4 states. [2021-02-24 04:17:51,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:17:51,343 INFO L93 Difference]: Finished difference Result 34623 states and 43580 transitions. [2021-02-24 04:17:51,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-24 04:17:51,344 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 96 [2021-02-24 04:17:51,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:17:51,411 INFO L225 Difference]: With dead ends: 34623 [2021-02-24 04:17:51,411 INFO L226 Difference]: Without dead ends: 34621 [2021-02-24 04:17:51,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-24 04:17:51,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34621 states. [2021-02-24 04:17:55,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34621 to 29499. [2021-02-24 04:17:55,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29499 states. [2021-02-24 04:17:55,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29499 states to 29499 states and 37178 transitions. [2021-02-24 04:17:55,353 INFO L78 Accepts]: Start accepts. Automaton has 29499 states and 37178 transitions. Word has length 96 [2021-02-24 04:17:55,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:17:55,353 INFO L480 AbstractCegarLoop]: Abstraction has 29499 states and 37178 transitions. [2021-02-24 04:17:55,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-24 04:17:55,353 INFO L276 IsEmpty]: Start isEmpty. Operand 29499 states and 37178 transitions. [2021-02-24 04:17:55,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-02-24 04:17:55,370 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:17:55,371 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:17:55,371 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-02-24 04:17:55,371 INFO L428 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:17:55,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:17:55,371 INFO L82 PathProgramCache]: Analyzing trace with hash 475832085, now seen corresponding path program 1 times [2021-02-24 04:17:55,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:17:55,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943335875] [2021-02-24 04:17:55,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:17:55,373 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:17:55,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:17:55,391 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:55,392 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:55,392 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:55,393 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:17:55,396 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:55,396 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:55,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:17:55,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:17:55,421 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:17:55,422 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:17:55,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:17:55,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943335875] [2021-02-24 04:17:55,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:17:55,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-24 04:17:55,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941452402] [2021-02-24 04:17:55,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-24 04:17:55,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:17:55,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-24 04:17:55,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-24 04:17:55,432 INFO L87 Difference]: Start difference. First operand 29499 states and 37178 transitions. Second operand 4 states. [2021-02-24 04:18:02,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:18:02,456 INFO L93 Difference]: Finished difference Result 86847 states and 109372 transitions. [2021-02-24 04:18:02,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-24 04:18:02,457 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 96 [2021-02-24 04:18:02,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:18:02,541 INFO L225 Difference]: With dead ends: 86847 [2021-02-24 04:18:02,541 INFO L226 Difference]: Without dead ends: 57405 [2021-02-24 04:18:02,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-24 04:18:02,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57405 states. [2021-02-24 04:18:09,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57405 to 57403. [2021-02-24 04:18:09,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57403 states. [2021-02-24 04:18:09,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57403 states to 57403 states and 71226 transitions. [2021-02-24 04:18:09,804 INFO L78 Accepts]: Start accepts. Automaton has 57403 states and 71226 transitions. Word has length 96 [2021-02-24 04:18:09,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:18:09,804 INFO L480 AbstractCegarLoop]: Abstraction has 57403 states and 71226 transitions. [2021-02-24 04:18:09,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-24 04:18:09,805 INFO L276 IsEmpty]: Start isEmpty. Operand 57403 states and 71226 transitions. [2021-02-24 04:18:10,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-02-24 04:18:10,004 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:18:10,004 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:18:10,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-02-24 04:18:10,005 INFO L428 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:18:10,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:18:10,005 INFO L82 PathProgramCache]: Analyzing trace with hash 377748425, now seen corresponding path program 1 times [2021-02-24 04:18:10,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:18:10,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1883323591] [2021-02-24 04:18:10,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:18:10,007 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:18:10,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:18:10,029 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:18:10,030 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:18:10,031 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:18:10,031 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:18:10,034 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:18:10,034 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:18:10,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:18:10,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:18:10,066 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:18:10,067 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:18:10,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:18:10,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1883323591] [2021-02-24 04:18:10,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:18:10,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-24 04:18:10,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688981732] [2021-02-24 04:18:10,076 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-24 04:18:10,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:18:10,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-24 04:18:10,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-24 04:18:10,077 INFO L87 Difference]: Start difference. First operand 57403 states and 71226 transitions. Second operand 4 states. [2021-02-24 04:18:17,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:18:17,908 INFO L93 Difference]: Finished difference Result 66623 states and 81468 transitions. [2021-02-24 04:18:17,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-24 04:18:17,909 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 97 [2021-02-24 04:18:17,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:18:17,989 INFO L225 Difference]: With dead ends: 66623 [2021-02-24 04:18:17,990 INFO L226 Difference]: Without dead ends: 66621 [2021-02-24 04:18:18,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-24 04:18:18,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66621 states. [2021-02-24 04:18:25,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66621 to 57403. [2021-02-24 04:18:25,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57403 states. [2021-02-24 04:18:25,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57403 states to 57403 states and 70714 transitions. [2021-02-24 04:18:25,160 INFO L78 Accepts]: Start accepts. Automaton has 57403 states and 70714 transitions. Word has length 97 [2021-02-24 04:18:25,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:18:25,160 INFO L480 AbstractCegarLoop]: Abstraction has 57403 states and 70714 transitions. [2021-02-24 04:18:25,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-24 04:18:25,161 INFO L276 IsEmpty]: Start isEmpty. Operand 57403 states and 70714 transitions. [2021-02-24 04:18:25,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-02-24 04:18:25,184 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:18:25,184 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:18:25,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-02-24 04:18:25,184 INFO L428 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:18:25,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:18:25,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1866139683, now seen corresponding path program 1 times [2021-02-24 04:18:25,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:18:25,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [391523106] [2021-02-24 04:18:25,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:18:25,187 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:18:25,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:18:25,203 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:18:25,204 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:18:25,205 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:18:25,205 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:18:25,208 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:18:25,208 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:18:25,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:18:25,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:18:25,234 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:18:25,235 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:18:25,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:18:25,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [391523106] [2021-02-24 04:18:25,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:18:25,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-24 04:18:25,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065486425] [2021-02-24 04:18:25,411 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-24 04:18:25,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:18:25,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-24 04:18:25,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-24 04:18:25,412 INFO L87 Difference]: Start difference. First operand 57403 states and 70714 transitions. Second operand 4 states. [2021-02-24 04:18:39,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:18:39,390 INFO L93 Difference]: Finished difference Result 169021 states and 207931 transitions. [2021-02-24 04:18:39,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-24 04:18:39,391 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 97 [2021-02-24 04:18:39,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:18:39,740 INFO L225 Difference]: With dead ends: 169021 [2021-02-24 04:18:39,741 INFO L226 Difference]: Without dead ends: 57403 [2021-02-24 04:18:39,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-24 04:18:39,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57403 states. [2021-02-24 04:18:46,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57403 to 57403. [2021-02-24 04:18:46,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57403 states. [2021-02-24 04:18:46,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57403 states to 57403 states and 68666 transitions. [2021-02-24 04:18:46,850 INFO L78 Accepts]: Start accepts. Automaton has 57403 states and 68666 transitions. Word has length 97 [2021-02-24 04:18:46,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:18:46,851 INFO L480 AbstractCegarLoop]: Abstraction has 57403 states and 68666 transitions. [2021-02-24 04:18:46,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-24 04:18:46,851 INFO L276 IsEmpty]: Start isEmpty. Operand 57403 states and 68666 transitions. [2021-02-24 04:18:46,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-02-24 04:18:46,871 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:18:46,871 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:18:46,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-02-24 04:18:46,872 INFO L428 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:18:46,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:18:46,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1239562796, now seen corresponding path program 1 times [2021-02-24 04:18:46,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:18:46,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1208020162] [2021-02-24 04:18:46,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:18:46,875 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:18:46,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:18:46,896 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:18:46,896 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:18:46,897 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:18:46,898 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:18:46,901 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:18:46,901 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:18:46,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:18:46,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:18:46,938 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:18:46,939 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:18:46,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:18:46,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1208020162] [2021-02-24 04:18:46,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:18:46,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-24 04:18:46,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887617685] [2021-02-24 04:18:46,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-24 04:18:46,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:18:46,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-24 04:18:46,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-24 04:18:46,951 INFO L87 Difference]: Start difference. First operand 57403 states and 68666 transitions. Second operand 4 states. [2021-02-24 04:18:54,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:18:54,277 INFO L93 Difference]: Finished difference Result 57403 states and 68666 transitions. [2021-02-24 04:18:54,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-24 04:18:54,280 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 98 [2021-02-24 04:18:54,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:18:54,280 INFO L225 Difference]: With dead ends: 57403 [2021-02-24 04:18:54,280 INFO L226 Difference]: Without dead ends: 0 [2021-02-24 04:18:54,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-24 04:18:54,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-24 04:18:54,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-24 04:18:54,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-24 04:18:54,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-24 04:18:54,330 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 98 [2021-02-24 04:18:54,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:18:54,331 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-24 04:18:54,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-24 04:18:54,331 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-24 04:18:54,331 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-24 04:18:54,331 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-02-24 04:18:54,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-24 04:19:13,785 WARN L202 SmtUtils]: Spent 19.32 s on a formula simplification. DAG size of input: 4192 DAG size of output: 34 [2021-02-24 04:19:18,324 WARN L202 SmtUtils]: Spent 4.52 s on a formula simplification. DAG size of input: 2102 DAG size of output: 31 [2021-02-24 04:20:17,187 WARN L202 SmtUtils]: Spent 58.85 s on a formula simplification that was a NOOP. DAG size: 2125 [2021-02-24 04:20:34,722 WARN L202 SmtUtils]: Spent 17.52 s on a formula simplification. DAG size of input: 2134 DAG size of output: 581 [2021-02-24 04:20:37,233 WARN L202 SmtUtils]: Spent 2.50 s on a formula simplification. DAG size of input: 1091 DAG size of output: 189 [2021-02-24 04:20:40,036 WARN L202 SmtUtils]: Spent 2.80 s on a formula simplification. DAG size of input: 1120 DAG size of output: 191 [2021-02-24 04:20:41,890 WARN L202 SmtUtils]: Spent 1.85 s on a formula simplification. DAG size of input: 1216 DAG size of output: 87 [2021-02-24 04:20:46,184 WARN L202 SmtUtils]: Spent 4.28 s on a formula simplification. DAG size of input: 2107 DAG size of output: 45 [2021-02-24 04:21:35,937 WARN L202 SmtUtils]: Spent 49.74 s on a formula simplification. DAG size of input: 5189 DAG size of output: 31 [2021-02-24 04:21:43,710 WARN L202 SmtUtils]: Spent 7.77 s on a formula simplification. DAG size of input: 1095 DAG size of output: 581 [2021-02-24 04:21:52,684 WARN L202 SmtUtils]: Spent 8.96 s on a formula simplification. DAG size of input: 2914 DAG size of output: 53 [2021-02-24 04:22:07,436 WARN L202 SmtUtils]: Spent 14.75 s on a formula simplification that was a NOOP. DAG size: 1099 [2021-02-24 04:22:22,059 WARN L202 SmtUtils]: Spent 14.61 s on a formula simplification. DAG size of input: 2656 DAG size of output: 41 [2021-02-24 04:22:26,611 WARN L202 SmtUtils]: Spent 4.53 s on a formula simplification. DAG size of input: 2111 DAG size of output: 65 [2021-02-24 04:22:58,535 WARN L202 SmtUtils]: Spent 31.91 s on a formula simplification. DAG size of input: 4797 DAG size of output: 31 [2021-02-24 04:22:59,644 WARN L202 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 1076 DAG size of output: 31 [2021-02-24 04:23:09,803 WARN L202 SmtUtils]: Spent 10.15 s on a formula simplification. DAG size of input: 2146 DAG size of output: 321 [2021-02-24 04:23:11,886 WARN L202 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 1144 DAG size of output: 123 [2021-02-24 04:23:13,807 WARN L202 SmtUtils]: Spent 1.92 s on a formula simplification. DAG size of input: 1312 DAG size of output: 67 [2021-02-24 04:24:10,066 WARN L202 SmtUtils]: Spent 56.24 s on a formula simplification. DAG size of input: 5216 DAG size of output: 31 [2021-02-24 04:24:15,626 WARN L202 SmtUtils]: Spent 5.55 s on a formula simplification. DAG size of input: 2115 DAG size of output: 121 [2021-02-24 04:24:16,712 WARN L202 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 1081 DAG size of output: 45 [2021-02-24 04:24:35,460 WARN L202 SmtUtils]: Spent 18.73 s on a formula simplification. DAG size of input: 3682 DAG size of output: 45 [2021-02-24 04:24:43,185 WARN L202 SmtUtils]: Spent 7.72 s on a formula simplification. DAG size of input: 1102 DAG size of output: 583 [2021-02-24 04:24:59,250 WARN L202 SmtUtils]: Spent 16.05 s on a formula simplification. DAG size of input: 4192 DAG size of output: 34 [2021-02-24 04:25:56,547 WARN L202 SmtUtils]: Spent 57.28 s on a formula simplification. DAG size of input: 5216 DAG size of output: 31 [2021-02-24 04:26:39,585 WARN L202 SmtUtils]: Spent 43.02 s on a formula simplification. DAG size of input: 5139 DAG size of output: 31 [2021-02-24 04:26:50,112 WARN L202 SmtUtils]: Spent 10.52 s on a formula simplification. DAG size of input: 2119 DAG size of output: 321 [2021-02-24 04:26:51,382 WARN L202 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 1085 DAG size of output: 65 [2021-02-24 04:26:58,539 WARN L202 SmtUtils]: Spent 7.15 s on a formula simplification. DAG size of input: 2194 DAG size of output: 189 [2021-02-24 04:27:00,343 WARN L202 SmtUtils]: Spent 1.80 s on a formula simplification. DAG size of input: 1216 DAG size of output: 87 [2021-02-24 04:27:02,936 WARN L202 SmtUtils]: Spent 2.59 s on a formula simplification. DAG size of input: 1504 DAG size of output: 55 [2021-02-24 04:27:28,126 WARN L202 SmtUtils]: Spent 25.17 s on a formula simplification. DAG size of input: 4411 DAG size of output: 31 [2021-02-24 04:27:58,092 WARN L202 SmtUtils]: Spent 29.96 s on a formula simplification. DAG size of input: 2123 DAG size of output: 1097 [2021-02-24 04:27:59,831 WARN L202 SmtUtils]: Spent 1.73 s on a formula simplification. DAG size of input: 1089 DAG size of output: 121 [2021-02-24 04:28:14,324 WARN L202 SmtUtils]: Spent 14.49 s on a formula simplification that was a NOOP. DAG size: 1099 [2021-02-24 04:29:11,064 WARN L202 SmtUtils]: Spent 56.72 s on a formula simplification. DAG size of input: 5218 DAG size of output: 39 [2021-02-24 04:29:15,581 WARN L202 SmtUtils]: Spent 4.51 s on a formula simplification. DAG size of input: 1108 DAG size of output: 323 [2021-02-24 04:29:19,825 WARN L202 SmtUtils]: Spent 4.23 s on a formula simplification. DAG size of input: 2105 DAG size of output: 39 [2021-02-24 04:30:11,651 WARN L202 SmtUtils]: Spent 51.80 s on a formula simplification. DAG size of input: 5211 DAG size of output: 31 [2021-02-24 04:30:15,620 WARN L202 SmtUtils]: Spent 3.96 s on a formula simplification. DAG size of input: 2102 DAG size of output: 31 [2021-02-24 04:30:19,766 WARN L202 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 1093 DAG size of output: 321 [2021-02-24 04:30:25,834 WARN L202 SmtUtils]: Spent 6.06 s on a formula simplification. DAG size of input: 2242 DAG size of output: 121 [2021-02-24 04:30:27,822 WARN L202 SmtUtils]: Spent 1.98 s on a formula simplification. DAG size of input: 1312 DAG size of output: 67 [2021-02-24 04:30:33,052 WARN L202 SmtUtils]: Spent 5.22 s on a formula simplification. DAG size of input: 1888 DAG size of output: 47 [2021-02-24 04:30:37,368 WARN L202 SmtUtils]: Spent 4.30 s on a formula simplification. DAG size of input: 2109 DAG size of output: 53