/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/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 18:49:53,611 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 18:49:53,614 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 18:49:53,680 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 18:49:53,718 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 18:49:53,721 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 18:49:53,724 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 18:49:53,727 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 18:49:53,747 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 18:49:53,750 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 18:49:53,760 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 18:49:53,773 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 18:49:53,778 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 18:49:53,782 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 18:49:53,785 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 18:49:53,789 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 18:49:53,800 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 18:49:53,813 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 18:49:53,814 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 18:49:53,815 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 18:49:53,818 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 18:49:53,839 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 18:49:53,840 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 18:49:53,844 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 18:49:53,845 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 18:49:53,845 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 18:49:53,845 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 18:49:53,845 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 18:49:53,845 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 18:49:53,846 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 18:49:53,846 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 18:49:53,847 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 18:49:53,847 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 18:49:53,847 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 18:49:53,848 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 18:49:53,848 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 18:49:53,848 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 18:49:53,848 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 18:49:53,848 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 18:49:53,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 18:49:53,849 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 18:49:53,849 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 18:49:53,849 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 18:49:53,849 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 18:49:54,273 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 18:49:54,316 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 18:49:54,320 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 18:49:54,322 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 18:49:54,323 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 18:49:54,324 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c [2021-02-23 18:49:54,420 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4e63a214/da8f54c841034eaf80899ddb0af518e8/FLAGed56aa530 [2021-02-23 18:49:55,142 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 18:49:55,143 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c [2021-02-23 18:49:55,154 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4e63a214/da8f54c841034eaf80899ddb0af518e8/FLAGed56aa530 [2021-02-23 18:49:55,468 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4e63a214/da8f54c841034eaf80899ddb0af518e8 [2021-02-23 18:49:55,474 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 18:49:55,489 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 18:49:55,496 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 18:49:55,497 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 18:49:55,501 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 18:49:55,502 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:49:55" (1/1) ... [2021-02-23 18:49:55,504 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fab5cdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:49:55, skipping insertion in model container [2021-02-23 18:49:55,504 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:49:55" (1/1) ... [2021-02-23 18:49:55,514 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 18:49:55,545 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 18:49:55,720 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c[1126,1139] [2021-02-23 18:49:55,737 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c[1880,1893] [2021-02-23 18:49:55,752 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c[2415,2428] [2021-02-23 18:49:55,766 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:49:55,788 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 18:49:55,831 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c[1126,1139] [2021-02-23 18:49:55,840 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c[1880,1893] [2021-02-23 18:49:55,844 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c[2415,2428] [2021-02-23 18:49:55,849 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:49:55,872 INFO L208 MainTranslator]: Completed translation [2021-02-23 18:49:55,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:49:55 WrapperNode [2021-02-23 18:49:55,873 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 18:49:55,875 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 18:49:55,875 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 18:49:55,875 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 18:49:55,895 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:49:55" (1/1) ... [2021-02-23 18:49:55,895 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:49:55" (1/1) ... [2021-02-23 18:49:55,907 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:49:55" (1/1) ... [2021-02-23 18:49:55,908 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:49:55" (1/1) ... [2021-02-23 18:49:55,918 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:49:55" (1/1) ... [2021-02-23 18:49:55,929 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:49:55" (1/1) ... [2021-02-23 18:49:55,933 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:49:55" (1/1) ... [2021-02-23 18:49:55,941 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 18:49:55,945 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 18:49:55,946 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 18:49:55,946 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 18:49:55,953 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:49:55" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 18:49:56,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 18:49:56,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 18:49:56,109 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 18:49:56,110 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-23 18:49:56,110 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 18:49:56,110 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 18:49:56,110 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 18:49:56,111 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 18:49:56,111 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 18:49:56,111 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-23 18:49:56,112 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-23 18:49:56,112 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-02-23 18:49:56,112 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 18:49:56,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 18:49:56,114 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 18:49:56,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 18:49:56,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 18:49:56,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 18:49:56,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 18:49:56,863 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 18:49:56,863 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-23 18:49:56,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:49:56 BoogieIcfgContainer [2021-02-23 18:49:56,866 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 18:49:56,868 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 18:49:56,868 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 18:49:56,872 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 18:49:56,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 06:49:55" (1/3) ... [2021-02-23 18:49:56,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7970f1a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:49:56, skipping insertion in model container [2021-02-23 18:49:56,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:49:55" (2/3) ... [2021-02-23 18:49:56,875 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7970f1a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:49:56, skipping insertion in model container [2021-02-23 18:49:56,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:49:56" (3/3) ... [2021-02-23 18:49:56,877 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_4.i.v+nlh-reducer.c [2021-02-23 18:49:56,886 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 18:49:56,893 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2021-02-23 18:49:56,921 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-02-23 18:49:56,950 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 18:49:56,950 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 18:49:56,950 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 18:49:56,951 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 18:49:56,951 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 18:49:56,951 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 18:49:56,951 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 18:49:56,952 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 18:49:56,972 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states. [2021-02-23 18:49:56,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-23 18:49:56,984 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:49:56,986 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] [2021-02-23 18:49:56,986 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:49:56,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:49:56,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1631991453, now seen corresponding path program 1 times [2021-02-23 18:49:57,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:49:57,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [242529321] [2021-02-23 18:49:57,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:49:57,110 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:49:57,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:49:57,287 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:57,289 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:49:57,295 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:57,299 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 18:49:57,324 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:57,326 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:49:57,474 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-02-23 18:49:57,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:49:57,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:49:57,528 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:57,529 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:49:57,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:49:57,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [242529321] [2021-02-23 18:49:57,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:49:57,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 18:49:57,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791869974] [2021-02-23 18:49:57,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 18:49:57,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:49:57,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 18:49:57,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 18:49:57,576 INFO L87 Difference]: Start difference. First operand 108 states. Second operand 4 states. [2021-02-23 18:49:58,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:49:58,163 INFO L93 Difference]: Finished difference Result 215 states and 241 transitions. [2021-02-23 18:49:58,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 18:49:58,166 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2021-02-23 18:49:58,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:49:58,179 INFO L225 Difference]: With dead ends: 215 [2021-02-23 18:49:58,179 INFO L226 Difference]: Without dead ends: 115 [2021-02-23 18:49:58,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 18:49:58,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-02-23 18:49:58,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2021-02-23 18:49:58,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-02-23 18:49:58,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2021-02-23 18:49:58,257 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 35 [2021-02-23 18:49:58,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:49:58,258 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2021-02-23 18:49:58,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 18:49:58,258 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2021-02-23 18:49:58,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-23 18:49:58,260 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:49:58,260 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] [2021-02-23 18:49:58,261 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 18:49:58,261 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:49:58,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:49:58,262 INFO L82 PathProgramCache]: Analyzing trace with hash 510759303, now seen corresponding path program 1 times [2021-02-23 18:49:58,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:49:58,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190040209] [2021-02-23 18:49:58,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:49:58,274 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:49:58,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:49:58,428 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:58,429 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:49:58,431 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:58,431 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:49:58,437 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:58,438 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:49:58,445 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:58,446 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:49:58,453 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:58,454 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:49:58,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:49:58,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:49:58,515 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:58,516 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:49:58,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:49:58,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190040209] [2021-02-23 18:49:58,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:49:58,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 18:49:58,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124844636] [2021-02-23 18:49:58,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 18:49:58,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:49:58,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 18:49:58,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 18:49:58,549 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand 6 states. [2021-02-23 18:49:58,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:49:58,861 INFO L93 Difference]: Finished difference Result 132 states and 140 transitions. [2021-02-23 18:49:58,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-23 18:49:58,862 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2021-02-23 18:49:58,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:49:58,865 INFO L225 Difference]: With dead ends: 132 [2021-02-23 18:49:58,865 INFO L226 Difference]: Without dead ends: 130 [2021-02-23 18:49:58,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-02-23 18:49:58,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-02-23 18:49:58,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 86. [2021-02-23 18:49:58,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2021-02-23 18:49:58,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 91 transitions. [2021-02-23 18:49:58,887 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 91 transitions. Word has length 36 [2021-02-23 18:49:58,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:49:58,887 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 91 transitions. [2021-02-23 18:49:58,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 18:49:58,888 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 91 transitions. [2021-02-23 18:49:58,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-23 18:49:58,889 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:49:58,890 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] [2021-02-23 18:49:58,890 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 18:49:58,890 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:49:58,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:49:58,891 INFO L82 PathProgramCache]: Analyzing trace with hash 2004335176, now seen corresponding path program 1 times [2021-02-23 18:49:58,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:49:58,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507605638] [2021-02-23 18:49:58,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:49:58,895 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:49:58,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:49:58,937 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:58,938 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:49:58,940 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:58,940 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 18:49:58,946 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:58,947 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:49:58,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:49:58,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:49:59,000 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:59,001 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:49:59,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:49:59,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [507605638] [2021-02-23 18:49:59,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:49:59,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 18:49:59,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255024542] [2021-02-23 18:49:59,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 18:49:59,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:49:59,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 18:49:59,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 18:49:59,009 INFO L87 Difference]: Start difference. First operand 86 states and 91 transitions. Second operand 4 states. [2021-02-23 18:49:59,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:49:59,256 INFO L93 Difference]: Finished difference Result 162 states and 170 transitions. [2021-02-23 18:49:59,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 18:49:59,260 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2021-02-23 18:49:59,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:49:59,262 INFO L225 Difference]: With dead ends: 162 [2021-02-23 18:49:59,262 INFO L226 Difference]: Without dead ends: 111 [2021-02-23 18:49:59,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 18:49:59,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-02-23 18:49:59,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 78. [2021-02-23 18:49:59,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-02-23 18:49:59,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2021-02-23 18:49:59,288 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 36 [2021-02-23 18:49:59,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:49:59,292 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2021-02-23 18:49:59,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 18:49:59,292 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2021-02-23 18:49:59,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-23 18:49:59,295 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:49:59,295 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] [2021-02-23 18:49:59,295 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 18:49:59,295 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:49:59,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:49:59,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1679437122, now seen corresponding path program 1 times [2021-02-23 18:49:59,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:49:59,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386642365] [2021-02-23 18:49:59,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:49:59,308 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:49:59,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:49:59,382 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:59,383 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:49:59,384 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:59,384 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:49:59,389 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:59,390 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:49:59,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:49:59,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:49:59,445 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:59,446 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:49:59,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:49:59,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1386642365] [2021-02-23 18:49:59,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:49:59,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 18:49:59,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29252416] [2021-02-23 18:49:59,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 18:49:59,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:49:59,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 18:49:59,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 18:49:59,453 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 4 states. [2021-02-23 18:49:59,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:49:59,669 INFO L93 Difference]: Finished difference Result 106 states and 110 transitions. [2021-02-23 18:49:59,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 18:49:59,670 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2021-02-23 18:49:59,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:49:59,671 INFO L225 Difference]: With dead ends: 106 [2021-02-23 18:49:59,671 INFO L226 Difference]: Without dead ends: 89 [2021-02-23 18:49:59,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 18:49:59,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-02-23 18:49:59,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 78. [2021-02-23 18:49:59,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-02-23 18:49:59,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2021-02-23 18:49:59,686 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 38 [2021-02-23 18:49:59,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:49:59,686 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2021-02-23 18:49:59,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 18:49:59,687 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2021-02-23 18:49:59,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-02-23 18:49:59,689 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:49:59,689 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:49:59,689 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 18:49:59,689 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:49:59,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:49:59,690 INFO L82 PathProgramCache]: Analyzing trace with hash 2146049076, now seen corresponding path program 1 times [2021-02-23 18:49:59,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:49:59,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484871329] [2021-02-23 18:49:59,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:49:59,694 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:49:59,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:49:59,872 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:59,873 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:49:59,874 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:59,875 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:49:59,887 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:59,888 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-23 18:49:59,900 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:59,901 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-23 18:49:59,920 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:59,921 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 18:49:59,936 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:59,937 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 18:49:59,941 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:49:59,943 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:49:59,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:49:59,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:50:00,008 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:50:00,009 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:50:00,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:50:00,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484871329] [2021-02-23 18:50:00,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:50:00,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 18:50:00,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3148357] [2021-02-23 18:50:00,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 18:50:00,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:50:00,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 18:50:00,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-02-23 18:50:00,030 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand 6 states. [2021-02-23 18:50:00,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:50:00,329 INFO L93 Difference]: Finished difference Result 186 states and 194 transitions. [2021-02-23 18:50:00,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-23 18:50:00,329 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2021-02-23 18:50:00,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:50:00,331 INFO L225 Difference]: With dead ends: 186 [2021-02-23 18:50:00,331 INFO L226 Difference]: Without dead ends: 144 [2021-02-23 18:50:00,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-02-23 18:50:00,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-02-23 18:50:00,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 92. [2021-02-23 18:50:00,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2021-02-23 18:50:00,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2021-02-23 18:50:00,348 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 57 [2021-02-23 18:50:00,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:50:00,348 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2021-02-23 18:50:00,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 18:50:00,349 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2021-02-23 18:50:00,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-02-23 18:50:00,350 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:50:00,351 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] [2021-02-23 18:50:00,351 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 18:50:00,351 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:50:00,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:50:00,352 INFO L82 PathProgramCache]: Analyzing trace with hash 2038639544, now seen corresponding path program 1 times [2021-02-23 18:50:00,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:50:00,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [110773088] [2021-02-23 18:50:00,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:50:00,355 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:50:00,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:50:00,398 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:50:00,399 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:50:00,399 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:50:00,400 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:50:00,404 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:50:00,404 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:50:00,409 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:50:00,410 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:50:00,415 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:50:00,416 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:50:00,417 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:50:00,417 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:50:00,424 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:50:00,425 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:50:00,433 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:50:00,434 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:50:00,443 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:50:00,444 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:50:00,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:50:00,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:50:00,503 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:50:00,504 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:50:00,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:50:00,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [110773088] [2021-02-23 18:50:00,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:50:00,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-23 18:50:00,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59529075] [2021-02-23 18:50:00,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-23 18:50:00,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:50:00,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-23 18:50:00,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-02-23 18:50:00,513 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 9 states. [2021-02-23 18:50:00,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:50:00,929 INFO L93 Difference]: Finished difference Result 162 states and 170 transitions. [2021-02-23 18:50:00,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-23 18:50:00,930 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2021-02-23 18:50:00,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:50:00,932 INFO L225 Difference]: With dead ends: 162 [2021-02-23 18:50:00,932 INFO L226 Difference]: Without dead ends: 160 [2021-02-23 18:50:00,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-02-23 18:50:00,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-02-23 18:50:00,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 97. [2021-02-23 18:50:00,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2021-02-23 18:50:00,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2021-02-23 18:50:00,951 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 58 [2021-02-23 18:50:00,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:50:00,951 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2021-02-23 18:50:00,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-23 18:50:00,952 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2021-02-23 18:50:00,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-02-23 18:50:00,953 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:50:00,954 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] [2021-02-23 18:50:00,954 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 18:50:00,954 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:50:00,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:50:00,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1267812039, now seen corresponding path program 1 times [2021-02-23 18:50:00,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:50:00,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [445576995] [2021-02-23 18:50:00,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:50:00,958 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:50:00,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:50:01,019 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:50:01,019 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:50:01,020 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:50:01,021 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:50:01,024 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:50:01,025 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-23 18:50:01,034 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:50:01,035 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 18:50:01,046 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:50:01,047 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 18:50:01,060 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:50:01,061 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 18:50:01,061 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:50:01,062 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:50:01,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:50:01,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:50:01,109 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:50:01,110 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:50:01,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:50:01,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [445576995] [2021-02-23 18:50:01,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:50:01,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 18:50:01,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673390996] [2021-02-23 18:50:01,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 18:50:01,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:50:01,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 18:50:01,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 18:50:01,124 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand 6 states. [2021-02-23 18:50:01,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:50:01,429 INFO L93 Difference]: Finished difference Result 174 states and 181 transitions. [2021-02-23 18:50:01,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-23 18:50:01,429 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2021-02-23 18:50:01,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:50:01,431 INFO L225 Difference]: With dead ends: 174 [2021-02-23 18:50:01,431 INFO L226 Difference]: Without dead ends: 127 [2021-02-23 18:50:01,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-02-23 18:50:01,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-02-23 18:50:01,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 97. [2021-02-23 18:50:01,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2021-02-23 18:50:01,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2021-02-23 18:50:01,453 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 58 [2021-02-23 18:50:01,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:50:01,454 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2021-02-23 18:50:01,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 18:50:01,454 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2021-02-23 18:50:01,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-02-23 18:50:01,455 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:50:01,455 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] [2021-02-23 18:50:01,456 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-23 18:50:01,456 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:50:01,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:50:01,457 INFO L82 PathProgramCache]: Analyzing trace with hash -742105895, now seen corresponding path program 1 times [2021-02-23 18:50:01,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:50:01,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1056750569] [2021-02-23 18:50:01,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:50:01,460 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:50:01,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:50:01,808 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:50:01,809 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:50:01,811 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:50:01,812 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-23 18:50:01,821 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:50:01,823 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-02-23 18:50:01,862 WARN L141 QuantifierPusher]: treesize reduction 9, result has 85.0 percent of original size [2021-02-23 18:50:01,864 WARN L147 QuantifierPusher]: treesize reduction 9, result has 85.0 percent of original size 51 [2021-02-23 18:50:01,900 WARN L141 QuantifierPusher]: treesize reduction 102, result has 39.6 percent of original size [2021-02-23 18:50:01,901 WARN L147 QuantifierPusher]: treesize reduction 102, result has 39.6 percent of original size 67 [2021-02-23 18:50:01,956 WARN L141 QuantifierPusher]: treesize reduction 179, result has 31.7 percent of original size [2021-02-23 18:50:01,962 WARN L147 QuantifierPusher]: treesize reduction 179, result has 31.7 percent of original size 83 [2021-02-23 18:50:02,032 WARN L141 QuantifierPusher]: treesize reduction 370, result has 23.9 percent of original size [2021-02-23 18:50:02,036 WARN L147 QuantifierPusher]: treesize reduction 370, result has 23.9 percent of original size 116 [2021-02-23 18:50:02,129 WARN L141 QuantifierPusher]: treesize reduction 656, result has 49.8 percent of original size [2021-02-23 18:50:02,150 WARN L147 QuantifierPusher]: treesize reduction 656, result has 49.8 percent of original size 651 [2021-02-23 18:50:02,355 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 44 [2021-02-23 18:50:02,367 WARN L141 QuantifierPusher]: treesize reduction 63, result has 87.3 percent of original size [2021-02-23 18:50:02,373 WARN L147 QuantifierPusher]: treesize reduction 63, result has 87.3 percent of original size 434 [2021-02-23 18:50:02,676 WARN L202 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 72 [2021-02-23 18:50:02,691 WARN L141 QuantifierPusher]: treesize reduction 53, result has 89.1 percent of original size [2021-02-23 18:50:02,699 WARN L147 QuantifierPusher]: treesize reduction 53, result has 89.1 percent of original size 433 [2021-02-23 18:50:02,867 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 59 [2021-02-23 18:50:02,878 WARN L141 QuantifierPusher]: treesize reduction 43, result has 88.5 percent of original size [2021-02-23 18:50:02,881 WARN L147 QuantifierPusher]: treesize reduction 43, result has 88.5 percent of original size 331 [2021-02-23 18:50:02,984 WARN L141 QuantifierPusher]: treesize reduction 21, result has 82.8 percent of original size [2021-02-23 18:50:02,985 WARN L147 QuantifierPusher]: treesize reduction 21, result has 82.8 percent of original size 101 [2021-02-23 18:50:03,030 WARN L141 QuantifierPusher]: treesize reduction 32, result has 67.3 percent of original size [2021-02-23 18:50:03,032 WARN L147 QuantifierPusher]: treesize reduction 32, result has 67.3 percent of original size 66 [2021-02-23 18:50:03,080 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:50:03,081 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:50:03,102 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:50:03,103 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:50:03,126 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:50:03,127 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:50:03,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:50:03,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:50:03,220 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:50:03,221 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:50:03,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:50:03,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1056750569] [2021-02-23 18:50:03,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:50:03,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-02-23 18:50:03,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482142730] [2021-02-23 18:50:03,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-23 18:50:03,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:50:03,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-23 18:50:03,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-02-23 18:50:03,277 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand 17 states. [2021-02-23 18:50:04,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:50:04,756 INFO L93 Difference]: Finished difference Result 152 states and 158 transitions. [2021-02-23 18:50:04,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-23 18:50:04,756 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 60 [2021-02-23 18:50:04,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:50:04,758 INFO L225 Difference]: With dead ends: 152 [2021-02-23 18:50:04,758 INFO L226 Difference]: Without dead ends: 105 [2021-02-23 18:50:04,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=183, Invalid=573, Unknown=0, NotChecked=0, Total=756 [2021-02-23 18:50:04,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-02-23 18:50:04,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 85. [2021-02-23 18:50:04,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-02-23 18:50:04,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2021-02-23 18:50:04,795 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 60 [2021-02-23 18:50:04,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:50:04,797 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2021-02-23 18:50:04,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-02-23 18:50:04,797 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2021-02-23 18:50:04,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-02-23 18:50:04,805 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:50:04,805 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:50:04,806 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-23 18:50:04,806 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:50:04,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:50:04,806 INFO L82 PathProgramCache]: Analyzing trace with hash -582759126, now seen corresponding path program 1 times [2021-02-23 18:50:04,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:50:04,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1108154187] [2021-02-23 18:50:04,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY