/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/loops-crafted-1/sumt7.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 21:32:58,805 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 21:32:58,808 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 21:32:58,857 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-21 21:32:58,871 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 21:32:58,872 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 21:32:58,874 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 21:32:58,875 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 21:32:58,876 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 21:32:58,889 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 21:32:58,891 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 21:32:58,894 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 21:32:58,896 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 21:32:58,898 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 21:32:58,899 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 21:32:58,901 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 21:32:58,904 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 21:32:58,915 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 21:32:58,916 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 21:32:58,917 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 21:32:58,918 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-21 21:32:58,933 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 21:32:58,934 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 21:32:58,935 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 21:32:58,936 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 21:32:58,936 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 21:32:58,936 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 21:32:58,936 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 21:32:58,936 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 21:32:58,937 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 21:32:58,937 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 21:32:58,937 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 21:32:58,937 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 21:32:58,938 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 21:32:58,938 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 21:32:58,938 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 21:32:58,938 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 21:32:58,939 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 21:32:58,939 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 21:32:58,939 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 21:32:58,939 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 21:32:58,940 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 21:32:58,940 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 21:32:58,940 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 21:32:59,360 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 21:32:59,399 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 21:32:59,402 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 21:32:59,404 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 21:32:59,404 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 21:32:59,406 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt7.c [2021-02-21 21:32:59,500 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30f67c27c/5113d7ceb3124549a9d8c5a43accc60f/FLAGaa789c782 [2021-02-21 21:33:00,174 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 21:33:00,175 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt7.c [2021-02-21 21:33:00,183 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30f67c27c/5113d7ceb3124549a9d8c5a43accc60f/FLAGaa789c782 [2021-02-21 21:33:00,543 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30f67c27c/5113d7ceb3124549a9d8c5a43accc60f [2021-02-21 21:33:00,547 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 21:33:00,563 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 21:33:00,571 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 21:33:00,571 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 21:33:00,576 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 21:33:00,577 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:33:00" (1/1) ... [2021-02-21 21:33:00,578 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@738c61dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:33:00, skipping insertion in model container [2021-02-21 21:33:00,579 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:33:00" (1/1) ... [2021-02-21 21:33:00,589 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 21:33:00,616 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 21:33:00,769 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt7.c[403,416] [2021-02-21 21:33:00,791 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:33:00,803 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 21:33:00,819 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt7.c[403,416] [2021-02-21 21:33:00,829 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:33:00,849 INFO L208 MainTranslator]: Completed translation [2021-02-21 21:33:00,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:33:00 WrapperNode [2021-02-21 21:33:00,850 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 21:33:00,851 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 21:33:00,851 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 21:33:00,852 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 21:33:00,867 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:33:00" (1/1) ... [2021-02-21 21:33:00,868 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:33:00" (1/1) ... [2021-02-21 21:33:00,877 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:33:00" (1/1) ... [2021-02-21 21:33:00,878 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:33:00" (1/1) ... [2021-02-21 21:33:00,885 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:33:00" (1/1) ... [2021-02-21 21:33:00,891 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:33:00" (1/1) ... [2021-02-21 21:33:00,893 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:33:00" (1/1) ... [2021-02-21 21:33:00,896 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 21:33:00,897 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 21:33:00,897 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 21:33:00,898 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 21:33:00,899 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:33:00" (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 [2021-02-21 21:33:01,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 21:33:01,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 21:33:01,026 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 21:33:01,026 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-21 21:33:01,026 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-21 21:33:01,026 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 21:33:01,026 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 21:33:01,027 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 21:33:01,027 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 21:33:01,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 21:33:01,027 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-21 21:33:01,027 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-21 21:33:01,027 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 21:33:01,028 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 21:33:01,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 21:33:01,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 21:33:01,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 21:33:01,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 21:33:01,028 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 21:33:01,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 21:33:01,650 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 21:33:01,651 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-21 21:33:01,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:33:01 BoogieIcfgContainer [2021-02-21 21:33:01,653 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 21:33:01,656 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 21:33:01,657 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 21:33:01,661 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 21:33:01,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 09:33:00" (1/3) ... [2021-02-21 21:33:01,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f6d6901 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:33:01, skipping insertion in model container [2021-02-21 21:33:01,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:33:00" (2/3) ... [2021-02-21 21:33:01,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f6d6901 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:33:01, skipping insertion in model container [2021-02-21 21:33:01,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:33:01" (3/3) ... [2021-02-21 21:33:01,666 INFO L111 eAbstractionObserver]: Analyzing ICFG sumt7.c [2021-02-21 21:33:01,674 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 21:33:01,680 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 21:33:01,704 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 21:33:01,745 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 21:33:01,745 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 21:33:01,745 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 21:33:01,745 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 21:33:01,746 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 21:33:01,746 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 21:33:01,746 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 21:33:01,746 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 21:33:01,770 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2021-02-21 21:33:01,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-21 21:33:01,787 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:33:01,788 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] [2021-02-21 21:33:01,789 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:33:01,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:33:01,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1439556865, now seen corresponding path program 1 times [2021-02-21 21:33:01,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:33:01,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601418656] [2021-02-21 21:33:01,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:33:01,920 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:33:02,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:02,386 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:02,388 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:02,390 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:02,391 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:33:02,418 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:02,420 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:33:02,440 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:02,442 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:33:02,471 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:02,473 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:33:02,509 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:02,511 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-21 21:33:02,556 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:02,558 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 21:33:02,609 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:02,611 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-21 21:33:02,668 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:02,674 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-21 21:33:02,719 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:02,723 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-02-21 21:33:02,819 WARN L141 QuantifierPusher]: treesize reduction 32, result has 83.0 percent of original size [2021-02-21 21:33:02,833 WARN L147 QuantifierPusher]: treesize reduction 32, result has 83.0 percent of original size 156 [2021-02-21 21:33:02,995 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-02-21 21:33:02,999 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:03,000 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:33:03,010 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:03,011 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:33:03,022 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:03,024 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:03,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:33:03,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:03,118 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:03,119 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:03,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:33:03,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601418656] [2021-02-21 21:33:03,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:33:03,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-02-21 21:33:03,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501324412] [2021-02-21 21:33:03,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-21 21:33:03,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:33:03,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-21 21:33:03,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-02-21 21:33:03,181 INFO L87 Difference]: Start difference. First operand 55 states. Second operand 15 states. [2021-02-21 21:33:04,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:33:04,687 INFO L93 Difference]: Finished difference Result 168 states and 229 transitions. [2021-02-21 21:33:04,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-21 21:33:04,689 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2021-02-21 21:33:04,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:33:04,701 INFO L225 Difference]: With dead ends: 168 [2021-02-21 21:33:04,702 INFO L226 Difference]: Without dead ends: 119 [2021-02-21 21:33:04,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2021-02-21 21:33:04,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-02-21 21:33:04,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 57. [2021-02-21 21:33:04,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-02-21 21:33:04,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2021-02-21 21:33:04,783 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 34 [2021-02-21 21:33:04,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:33:04,784 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2021-02-21 21:33:04,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-02-21 21:33:04,784 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2021-02-21 21:33:04,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-02-21 21:33:04,786 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:33:04,787 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-02-21 21:33:04,787 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 21:33:04,787 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:33:04,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:33:04,788 INFO L82 PathProgramCache]: Analyzing trace with hash 804824585, now seen corresponding path program 1 times [2021-02-21 21:33:04,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:33:04,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852366647] [2021-02-21 21:33:04,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:33:09,966 WARN L202 SmtUtils]: Spent 5.13 s on a formula simplification. DAG size of input: 538 DAG size of output: 246 [2021-02-21 21:33:09,994 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:33:10,003 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:33:10,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:10,091 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:10,093 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:10,095 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:10,101 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:33:10,110 WARN L141 QuantifierPusher]: treesize reduction 1, result has 98.9 percent of original size [2021-02-21 21:33:10,111 WARN L147 QuantifierPusher]: treesize reduction 1, result has 98.9 percent of original size 91 [2021-02-21 21:33:10,177 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size [2021-02-21 21:33:10,178 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size 103 [2021-02-21 21:33:10,196 WARN L141 QuantifierPusher]: treesize reduction 125, result has 0.8 percent of original size [2021-02-21 21:33:10,197 WARN L147 QuantifierPusher]: treesize reduction 125, result has 0.8 percent of original size 1 [2021-02-21 21:33:10,197 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:10,198 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:10,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:33:10,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:10,240 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:10,241 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:10,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-21 21:33:10,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:10,252 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:10,252 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:10,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:33:10,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [852366647] [2021-02-21 21:33:10,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:33:10,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-21 21:33:10,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364024564] [2021-02-21 21:33:10,260 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-21 21:33:10,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:33:10,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-21 21:33:10,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-21 21:33:10,261 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand 5 states. [2021-02-21 21:33:10,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:33:10,681 INFO L93 Difference]: Finished difference Result 93 states and 111 transitions. [2021-02-21 21:33:10,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 21:33:10,682 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2021-02-21 21:33:10,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:33:10,684 INFO L225 Difference]: With dead ends: 93 [2021-02-21 21:33:10,685 INFO L226 Difference]: Without dead ends: 71 [2021-02-21 21:33:10,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-21 21:33:10,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-02-21 21:33:10,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 59. [2021-02-21 21:33:10,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-02-21 21:33:10,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2021-02-21 21:33:10,712 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 43 [2021-02-21 21:33:10,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:33:10,712 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2021-02-21 21:33:10,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-21 21:33:10,713 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2021-02-21 21:33:10,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-21 21:33:10,714 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:33:10,714 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-02-21 21:33:10,715 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 21:33:10,715 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:33:10,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:33:10,716 INFO L82 PathProgramCache]: Analyzing trace with hash -603670227, now seen corresponding path program 1 times [2021-02-21 21:33:10,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:33:10,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020969580] [2021-02-21 21:33:10,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:33:39,613 WARN L202 SmtUtils]: Spent 28.76 s on a formula simplification. DAG size of input: 12630 DAG size of output: 247 [2021-02-21 21:33:39,618 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:33:39,620 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:33:39,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:39,682 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:39,683 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:39,684 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:39,685 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:33:39,690 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:39,691 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 86 [2021-02-21 21:33:39,710 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:39,710 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:39,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:33:39,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:39,749 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:39,750 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:39,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-21 21:33:39,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:39,758 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:39,759 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:39,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:33:39,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2020969580] [2021-02-21 21:33:39,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:33:39,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-21 21:33:39,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934007349] [2021-02-21 21:33:39,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-21 21:33:39,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:33:39,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-21 21:33:39,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-21 21:33:39,766 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand 5 states. [2021-02-21 21:33:40,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:33:40,091 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2021-02-21 21:33:40,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 21:33:40,092 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2021-02-21 21:33:40,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:33:40,093 INFO L225 Difference]: With dead ends: 83 [2021-02-21 21:33:40,094 INFO L226 Difference]: Without dead ends: 61 [2021-02-21 21:33:40,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-21 21:33:40,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-02-21 21:33:40,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2021-02-21 21:33:40,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-02-21 21:33:40,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2021-02-21 21:33:40,119 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 44 [2021-02-21 21:33:40,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:33:40,119 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2021-02-21 21:33:40,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-21 21:33:40,120 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2021-02-21 21:33:40,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-02-21 21:33:40,121 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:33:40,122 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-02-21 21:33:40,122 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 21:33:40,122 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:33:40,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:33:40,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1145561533, now seen corresponding path program 1 times [2021-02-21 21:33:40,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:33:40,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1049192361] [2021-02-21 21:33:40,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:33:46,335 WARN L202 SmtUtils]: Spent 6.20 s on a formula simplification. DAG size of input: 538 DAG size of output: 274 [2021-02-21 21:33:46,341 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:33:46,342 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:33:46,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:46,467 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-21 21:33:46,468 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-21 21:33:46,493 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.4 percent of original size [2021-02-21 21:33:46,496 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.4 percent of original size 27 [2021-02-21 21:33:46,521 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:46,522 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:33:46,536 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.4 percent of original size [2021-02-21 21:33:46,539 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.4 percent of original size 124 [2021-02-21 21:33:46,645 WARN L141 QuantifierPusher]: treesize reduction 9, result has 92.6 percent of original size [2021-02-21 21:33:46,647 WARN L147 QuantifierPusher]: treesize reduction 9, result has 92.6 percent of original size 113 [2021-02-21 21:33:46,674 WARN L141 QuantifierPusher]: treesize reduction 9, result has 91.4 percent of original size [2021-02-21 21:33:46,681 WARN L147 QuantifierPusher]: treesize reduction 9, result has 91.4 percent of original size 96 [2021-02-21 21:33:46,731 WARN L141 QuantifierPusher]: treesize reduction 49, result has 63.7 percent of original size [2021-02-21 21:33:46,733 WARN L147 QuantifierPusher]: treesize reduction 49, result has 63.7 percent of original size 86 [2021-02-21 21:33:46,735 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:46,736 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:46,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:33:46,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:46,786 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:46,787 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:46,788 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:46,788 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:33:46,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-21 21:33:46,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:46,815 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:46,816 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:46,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:33:46,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1049192361] [2021-02-21 21:33:46,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:33:46,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-21 21:33:46,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649899198] [2021-02-21 21:33:46,826 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-21 21:33:46,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:33:46,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-21 21:33:46,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-02-21 21:33:46,827 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand 9 states. [2021-02-21 21:33:47,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:33:47,487 INFO L93 Difference]: Finished difference Result 91 states and 107 transitions. [2021-02-21 21:33:47,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-21 21:33:47,488 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2021-02-21 21:33:47,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:33:47,489 INFO L225 Difference]: With dead ends: 91 [2021-02-21 21:33:47,489 INFO L226 Difference]: Without dead ends: 69 [2021-02-21 21:33:47,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-02-21 21:33:47,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-02-21 21:33:47,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 61. [2021-02-21 21:33:47,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2021-02-21 21:33:47,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2021-02-21 21:33:47,517 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 45 [2021-02-21 21:33:47,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:33:47,517 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2021-02-21 21:33:47,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-21 21:33:47,518 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2021-02-21 21:33:47,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-02-21 21:33:47,519 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:33:47,519 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-02-21 21:33:47,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 21:33:47,520 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:33:47,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:33:47,520 INFO L82 PathProgramCache]: Analyzing trace with hash -592547929, now seen corresponding path program 1 times [2021-02-21 21:33:47,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:33:47,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666108129] [2021-02-21 21:33:47,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:33:52,604 WARN L202 SmtUtils]: Spent 5.07 s on a formula simplification. DAG size of input: 538 DAG size of output: 228 [2021-02-21 21:33:52,611 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:33:52,612 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:33:52,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:52,654 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:52,655 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:52,656 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:52,656 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:33:52,661 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size [2021-02-21 21:33:52,666 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size 19 [2021-02-21 21:33:52,685 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-21 21:33:52,686 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-21 21:33:52,688 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:52,689 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:52,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:33:52,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:52,724 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:52,725 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:52,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-21 21:33:52,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:52,732 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:52,732 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:52,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:33:52,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666108129] [2021-02-21 21:33:52,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:33:52,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-21 21:33:52,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602698001] [2021-02-21 21:33:52,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-21 21:33:52,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:33:52,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-21 21:33:52,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-21 21:33:52,738 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand 5 states. [2021-02-21 21:33:53,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:33:53,026 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2021-02-21 21:33:53,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 21:33:53,027 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2021-02-21 21:33:53,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:33:53,029 INFO L225 Difference]: With dead ends: 90 [2021-02-21 21:33:53,029 INFO L226 Difference]: Without dead ends: 68 [2021-02-21 21:33:53,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-21 21:33:53,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-02-21 21:33:53,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2021-02-21 21:33:53,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-02-21 21:33:53,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2021-02-21 21:33:53,055 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 46 [2021-02-21 21:33:53,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:33:53,056 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2021-02-21 21:33:53,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-21 21:33:53,056 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2021-02-21 21:33:53,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-21 21:33:53,057 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:33:53,057 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-02-21 21:33:53,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-21 21:33:53,057 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:33:53,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:33:53,058 INFO L82 PathProgramCache]: Analyzing trace with hash -457220483, now seen corresponding path program 1 times [2021-02-21 21:33:53,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:33:53,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [403311086] [2021-02-21 21:33:53,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:33:59,539 WARN L202 SmtUtils]: Spent 6.46 s on a formula simplification. DAG size of input: 538 DAG size of output: 272 [2021-02-21 21:33:59,543 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:33:59,544 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:33:59,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:59,663 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-21 21:33:59,664 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-21 21:33:59,684 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size [2021-02-21 21:33:59,686 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size 26 [2021-02-21 21:33:59,710 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:59,711 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:33:59,726 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.2 percent of original size [2021-02-21 21:33:59,733 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.2 percent of original size 118 [2021-02-21 21:33:59,782 WARN L141 QuantifierPusher]: treesize reduction 7, result has 93.9 percent of original size [2021-02-21 21:33:59,785 WARN L147 QuantifierPusher]: treesize reduction 7, result has 93.9 percent of original size 108 [2021-02-21 21:33:59,813 WARN L141 QuantifierPusher]: treesize reduction 7, result has 92.9 percent of original size [2021-02-21 21:33:59,818 WARN L147 QuantifierPusher]: treesize reduction 7, result has 92.9 percent of original size 92 [2021-02-21 21:33:59,852 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-21 21:33:59,852 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-21 21:33:59,853 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:59,853 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:59,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:33:59,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:59,917 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:59,918 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:59,919 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:59,920 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:33:59,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-21 21:33:59,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:59,953 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:59,955 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:59,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:33:59,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [403311086] [2021-02-21 21:33:59,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:33:59,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-21 21:33:59,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798541643] [2021-02-21 21:33:59,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-21 21:33:59,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:33:59,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-21 21:33:59,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-02-21 21:33:59,974 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand 9 states. [2021-02-21 21:34:00,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:34:00,569 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2021-02-21 21:34:00,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-21 21:34:00,570 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2021-02-21 21:34:00,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:34:00,571 INFO L225 Difference]: With dead ends: 86 [2021-02-21 21:34:00,572 INFO L226 Difference]: Without dead ends: 64 [2021-02-21 21:34:00,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-02-21 21:34:00,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-02-21 21:34:00,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-02-21 21:34:00,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-02-21 21:34:00,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2021-02-21 21:34:00,598 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 47 [2021-02-21 21:34:00,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:34:00,598 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2021-02-21 21:34:00,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-21 21:34:00,598 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2021-02-21 21:34:00,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-21 21:34:00,599 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:34:00,599 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-02-21 21:34:00,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-21 21:34:00,600 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:34:00,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:34:00,600 INFO L82 PathProgramCache]: Analyzing trace with hash -385262047, now seen corresponding path program 1 times [2021-02-21 21:34:00,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:34:00,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661167661] [2021-02-21 21:34:00,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:34:33,235 WARN L202 SmtUtils]: Spent 32.55 s on a formula simplification. DAG size of input: 12630 DAG size of output: 246 [2021-02-21 21:34:33,238 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:34:33,239 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:34:33,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:34:33,287 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:33,288 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:34:33,289 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:33,289 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:34:33,294 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size [2021-02-21 21:34:33,295 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size 19 [2021-02-21 21:34:33,313 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-21 21:34:33,314 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-21 21:34:33,315 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:33,317 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:34:33,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:34:33,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:34:33,351 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:33,352 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:34:33,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-21 21:34:33,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:34:33,357 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:33,358 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:34:33,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:34:33,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1661167661] [2021-02-21 21:34:33,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:34:33,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-21 21:34:33,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543158166] [2021-02-21 21:34:33,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-21 21:34:33,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:34:33,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-21 21:34:33,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-21 21:34:33,371 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand 5 states. [2021-02-21 21:34:33,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:34:33,661 INFO L93 Difference]: Finished difference Result 88 states and 101 transitions. [2021-02-21 21:34:33,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 21:34:33,662 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 48 [2021-02-21 21:34:33,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:34:33,663 INFO L225 Difference]: With dead ends: 88 [2021-02-21 21:34:33,663 INFO L226 Difference]: Without dead ends: 66 [2021-02-21 21:34:33,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-21 21:34:33,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-02-21 21:34:33,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2021-02-21 21:34:33,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-02-21 21:34:33,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2021-02-21 21:34:33,688 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 48 [2021-02-21 21:34:33,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:34:33,689 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2021-02-21 21:34:33,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-21 21:34:33,689 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2021-02-21 21:34:33,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-21 21:34:33,690 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:34:33,690 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-02-21 21:34:33,690 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-21 21:34:33,691 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:34:33,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:34:33,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1931830847, now seen corresponding path program 1 times [2021-02-21 21:34:33,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:34:33,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1292688249] [2021-02-21 21:34:33,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:35:02,253 WARN L202 SmtUtils]: Spent 28.47 s on a formula simplification. DAG size of input: 12630 DAG size of output: 274 [2021-02-21 21:35:02,260 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:35:02,263 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:35:02,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:02,377 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:02,378 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:02,379 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:02,379 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:35:02,383 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:02,384 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:35:02,391 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:02,391 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:35:02,403 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:02,407 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:35:02,421 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:02,422 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-21 21:35:02,439 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:02,440 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 21:35:02,460 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:02,461 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-21 21:35:02,486 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:02,487 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-21 21:35:02,515 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:02,516 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-02-21 21:35:02,546 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:02,547 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-21 21:35:02,582 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:02,583 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-02-21 21:35:02,632 WARN L141 QuantifierPusher]: treesize reduction 32, result has 83.4 percent of original size [2021-02-21 21:35:02,635 WARN L147 QuantifierPusher]: treesize reduction 32, result has 83.4 percent of original size 161 [2021-02-21 21:35:02,744 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:02,745 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:35:02,759 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:02,761 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:35:02,774 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:02,775 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:02,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:35:02,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:02,828 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:02,830 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:02,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-21 21:35:02,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:02,836 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:02,837 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:02,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:35:02,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1292688249] [2021-02-21 21:35:02,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:35:02,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-02-21 21:35:02,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643512922] [2021-02-21 21:35:02,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-21 21:35:02,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:35:02,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-21 21:35:02,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-02-21 21:35:02,850 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand 17 states. [2021-02-21 21:35:04,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:35:04,250 INFO L93 Difference]: Finished difference Result 103 states and 122 transitions. [2021-02-21 21:35:04,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-21 21:35:04,251 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2021-02-21 21:35:04,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:35:04,252 INFO L225 Difference]: With dead ends: 103 [2021-02-21 21:35:04,252 INFO L226 Difference]: Without dead ends: 101 [2021-02-21 21:35:04,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=217, Invalid=775, Unknown=0, NotChecked=0, Total=992 [2021-02-21 21:35:04,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-02-21 21:35:04,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 71. [2021-02-21 21:35:04,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-02-21 21:35:04,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2021-02-21 21:35:04,281 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 48 [2021-02-21 21:35:04,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:35:04,282 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2021-02-21 21:35:04,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-02-21 21:35:04,282 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2021-02-21 21:35:04,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-02-21 21:35:04,283 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:35:04,283 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:35:04,283 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-21 21:35:04,284 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:35:04,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:35:04,284 INFO L82 PathProgramCache]: Analyzing trace with hash 262513031, now seen corresponding path program 2 times [2021-02-21 21:35:04,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:35:04,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001180212] [2021-02-21 21:35:04,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:35:18,972 WARN L202 SmtUtils]: Spent 14.63 s on a formula simplification. DAG size of input: 4566 DAG size of output: 274 [2021-02-21 21:35:36,024 WARN L202 SmtUtils]: Spent 14.56 s on a formula simplification. DAG size of input: 588 DAG size of output: 276 [2021-02-21 21:35:36,029 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:35:36,030 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:35:36,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:36,091 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-21 21:35:36,097 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-21 21:35:36,141 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size [2021-02-21 21:35:36,143 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size 26 [2021-02-21 21:35:36,188 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:36,189 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:35:36,208 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:36,209 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-21 21:35:36,235 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size [2021-02-21 21:35:36,237 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size 101 [2021-02-21 21:35:36,332 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.1 percent of original size [2021-02-21 21:35:36,335 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.1 percent of original size 107 [2021-02-21 21:35:36,370 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size [2021-02-21 21:35:36,371 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size 103 [2021-02-21 21:35:36,405 WARN L141 QuantifierPusher]: treesize reduction 125, result has 0.8 percent of original size [2021-02-21 21:35:36,406 WARN L147 QuantifierPusher]: treesize reduction 125, result has 0.8 percent of original size 1 [2021-02-21 21:35:36,406 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:36,407 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:36,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:35:36,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:36,485 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:36,486 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:36,487 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:36,488 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:35:36,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-21 21:35:36,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:36,527 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:36,528 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:36,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-21 21:35:36,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:36,534 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:36,535 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:36,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:35:36,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001180212] [2021-02-21 21:35:36,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:35:36,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-21 21:35:36,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461872694] [2021-02-21 21:35:36,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-21 21:35:36,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:35:36,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-21 21:35:36,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-02-21 21:35:36,550 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand 9 states. [2021-02-21 21:35:36,804 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-02-21 21:35:36,985 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-02-21 21:35:37,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:35:37,653 INFO L93 Difference]: Finished difference Result 107 states and 125 transitions. [2021-02-21 21:35:37,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-21 21:35:37,654 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 57 [2021-02-21 21:35:37,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:35:37,655 INFO L225 Difference]: With dead ends: 107 [2021-02-21 21:35:37,655 INFO L226 Difference]: Without dead ends: 85 [2021-02-21 21:35:37,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-02-21 21:35:37,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-02-21 21:35:37,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 73. [2021-02-21 21:35:37,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-02-21 21:35:37,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2021-02-21 21:35:37,680 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 57 [2021-02-21 21:35:37,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:35:37,680 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2021-02-21 21:35:37,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-21 21:35:37,681 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2021-02-21 21:35:37,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-02-21 21:35:37,685 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:35:37,686 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:35:37,686 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-21 21:35:37,686 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:35:37,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:35:37,687 INFO L82 PathProgramCache]: Analyzing trace with hash -235459217, now seen corresponding path program 1 times [2021-02-21 21:35:37,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:35:37,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964499035] [2021-02-21 21:35:37,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:35:46,215 WARN L202 SmtUtils]: Spent 8.51 s on a formula simplification. DAG size of input: 538 DAG size of output: 274