/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/sumt9.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 19:03:47,900 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 19:03:47,904 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 19:03:47,958 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 19:03:47,958 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 19:03:47,962 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 19:03:47,965 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 19:03:47,972 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 19:03:47,975 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 19:03:47,983 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 19:03:47,984 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 19:03:47,985 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 19:03:47,985 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 19:03:47,986 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 19:03:47,987 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 19:03:47,989 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 19:03:47,989 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 19:03:47,990 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 19:03:47,992 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 19:03:47,994 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 19:03:47,996 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 19:03:47,997 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 19:03:47,999 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 19:03:48,000 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 19:03:48,015 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 19:03:48,027 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 19:03:48,027 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 19:03:48,028 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 19:03:48,029 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 19:03:48,041 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 19:03:48,041 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 19:03:48,043 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 19:03:48,044 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 19:03:48,045 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 19:03:48,045 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 19:03:48,045 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 19:03:48,045 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 19:03:48,045 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 19:03:48,046 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 19:03:48,046 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 19:03:48,046 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 19:03:48,046 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 19:03:48,047 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 19:03:48,047 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 19:03:48,047 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 19:03:48,047 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 19:03:48,047 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 19:03:48,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 19:03:48,048 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 19:03:48,049 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 19:03:48,049 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 19:03:48,049 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 19:03:48,450 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 19:03:48,474 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 19:03:48,477 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 19:03:48,478 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 19:03:48,478 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 19:03:48,479 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt9.c [2021-02-23 19:03:48,558 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8325873b3/aaba0ad83b3d41d0bcdb88a2d5aa7bb9/FLAG1c1952708 [2021-02-23 19:03:49,176 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 19:03:49,177 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt9.c [2021-02-23 19:03:49,184 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8325873b3/aaba0ad83b3d41d0bcdb88a2d5aa7bb9/FLAG1c1952708 [2021-02-23 19:03:49,554 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8325873b3/aaba0ad83b3d41d0bcdb88a2d5aa7bb9 [2021-02-23 19:03:49,557 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 19:03:49,571 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 19:03:49,573 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 19:03:49,573 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 19:03:49,576 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 19:03:49,577 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 07:03:49" (1/1) ... [2021-02-23 19:03:49,578 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@313732aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:49, skipping insertion in model container [2021-02-23 19:03:49,578 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 07:03:49" (1/1) ... [2021-02-23 19:03:49,587 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 19:03:49,602 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 19:03:49,746 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/sumt9.c[403,416] [2021-02-23 19:03:49,768 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 19:03:49,778 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 19:03:49,793 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/sumt9.c[403,416] [2021-02-23 19:03:49,805 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 19:03:49,821 INFO L208 MainTranslator]: Completed translation [2021-02-23 19:03:49,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:49 WrapperNode [2021-02-23 19:03:49,822 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 19:03:49,824 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 19:03:49,824 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 19:03:49,824 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 19:03:49,838 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:49" (1/1) ... [2021-02-23 19:03:49,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:49" (1/1) ... [2021-02-23 19:03:49,862 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:49" (1/1) ... [2021-02-23 19:03:49,862 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:49" (1/1) ... [2021-02-23 19:03:49,879 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:49" (1/1) ... [2021-02-23 19:03:49,886 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:49" (1/1) ... [2021-02-23 19:03:49,893 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:49" (1/1) ... [2021-02-23 19:03:49,902 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 19:03:49,903 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 19:03:49,903 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 19:03:49,903 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 19:03:49,904 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:49" (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 19:03:50,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 19:03:50,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 19:03:50,026 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 19:03:50,027 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-23 19:03:50,027 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-23 19:03:50,027 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 19:03:50,027 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 19:03:50,028 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 19:03:50,028 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 19:03:50,029 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 19:03:50,030 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-23 19:03:50,030 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-23 19:03:50,031 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 19:03:50,031 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 19:03:50,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 19:03:50,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 19:03:50,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 19:03:50,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 19:03:50,034 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 19:03:50,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 19:03:50,588 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 19:03:50,589 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-23 19:03:50,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 07:03:50 BoogieIcfgContainer [2021-02-23 19:03:50,591 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 19:03:50,596 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 19:03:50,596 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 19:03:50,601 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 19:03:50,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 07:03:49" (1/3) ... [2021-02-23 19:03:50,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@342ac655 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 07:03:50, skipping insertion in model container [2021-02-23 19:03:50,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:49" (2/3) ... [2021-02-23 19:03:50,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@342ac655 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 07:03:50, skipping insertion in model container [2021-02-23 19:03:50,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 07:03:50" (3/3) ... [2021-02-23 19:03:50,607 INFO L111 eAbstractionObserver]: Analyzing ICFG sumt9.c [2021-02-23 19:03:50,614 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 19:03:50,620 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 19:03:50,639 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 19:03:50,675 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 19:03:50,675 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 19:03:50,675 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 19:03:50,676 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 19:03:50,676 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 19:03:50,677 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 19:03:50,677 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 19:03:50,677 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 19:03:50,702 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2021-02-23 19:03:50,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-23 19:03:50,717 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:03:50,718 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 19:03:50,718 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:03:50,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:03:50,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1856204290, now seen corresponding path program 1 times [2021-02-23 19:03:50,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:03:50,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1193817388] [2021-02-23 19:03:50,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:03:50,811 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:03:50,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:51,130 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:51,131 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:51,133 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:51,134 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:03:51,155 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:51,156 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:03:51,168 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:51,169 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 19:03:51,188 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:51,189 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 19:03:51,205 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:51,207 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-23 19:03:51,226 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:51,228 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 19:03:51,250 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:51,251 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 19:03:51,276 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:51,278 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-23 19:03:51,307 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:51,309 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-02-23 19:03:51,343 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:51,345 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-23 19:03:51,387 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:51,390 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-02-23 19:03:51,454 WARN L141 QuantifierPusher]: treesize reduction 4, result has 98.1 percent of original size [2021-02-23 19:03:51,487 WARN L147 QuantifierPusher]: treesize reduction 4, result has 98.1 percent of original size 210 [2021-02-23 19:03:51,653 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-02-23 19:03:51,660 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:51,661 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:03:51,674 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:51,675 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:03:51,687 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:51,688 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:51,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:03:51,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:51,758 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:51,759 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:51,786 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 19:03:51,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1193817388] [2021-02-23 19:03:51,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:03:51,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-02-23 19:03:51,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326122590] [2021-02-23 19:03:51,796 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-23 19:03:51,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:03:51,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-23 19:03:51,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-02-23 19:03:51,818 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 17 states. [2021-02-23 19:03:53,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:03:53,351 INFO L93 Difference]: Finished difference Result 194 states and 267 transitions. [2021-02-23 19:03:53,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-23 19:03:53,353 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 36 [2021-02-23 19:03:53,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:03:53,374 INFO L225 Difference]: With dead ends: 194 [2021-02-23 19:03:53,374 INFO L226 Difference]: Without dead ends: 141 [2021-02-23 19:03:53,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=268, Invalid=724, Unknown=0, NotChecked=0, Total=992 [2021-02-23 19:03:53,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-02-23 19:03:53,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 63. [2021-02-23 19:03:53,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-02-23 19:03:53,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2021-02-23 19:03:53,493 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 36 [2021-02-23 19:03:53,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:03:53,494 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2021-02-23 19:03:53,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-02-23 19:03:53,497 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2021-02-23 19:03:53,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-02-23 19:03:53,500 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:03:53,501 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, 1, 1] [2021-02-23 19:03:53,501 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 19:03:53,502 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:03:53,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:03:53,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1088228868, now seen corresponding path program 1 times [2021-02-23 19:03:53,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:03:53,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [20724004] [2021-02-23 19:03:53,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:04:01,418 WARN L202 SmtUtils]: Spent 7.86 s on a formula simplification. DAG size of input: 540 DAG size of output: 303 [2021-02-23 19:04:01,443 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:04:01,448 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:04:01,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:04:01,634 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:01,635 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:01,636 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:01,636 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:04:01,642 WARN L141 QuantifierPusher]: treesize reduction 1, result has 98.9 percent of original size [2021-02-23 19:04:01,643 WARN L147 QuantifierPusher]: treesize reduction 1, result has 98.9 percent of original size 91 [2021-02-23 19:04:01,689 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size [2021-02-23 19:04:01,692 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size 103 [2021-02-23 19:04:01,703 WARN L141 QuantifierPusher]: treesize reduction 125, result has 0.8 percent of original size [2021-02-23 19:04:01,705 WARN L147 QuantifierPusher]: treesize reduction 125, result has 0.8 percent of original size 1 [2021-02-23 19:04:01,706 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:01,707 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:01,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:04:01,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:04:01,745 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:01,746 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:01,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 19:04:01,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:04:01,754 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:01,755 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:01,760 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 19:04:01,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [20724004] [2021-02-23 19:04:01,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:04:01,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 19:04:01,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281456593] [2021-02-23 19:04:01,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 19:04:01,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:04:01,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 19:04:01,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-23 19:04:01,763 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand 5 states. [2021-02-23 19:04:02,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:04:02,139 INFO L93 Difference]: Finished difference Result 107 states and 131 transitions. [2021-02-23 19:04:02,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 19:04:02,139 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 45 [2021-02-23 19:04:02,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:04:02,141 INFO L225 Difference]: With dead ends: 107 [2021-02-23 19:04:02,141 INFO L226 Difference]: Without dead ends: 81 [2021-02-23 19:04:02,143 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 [2021-02-23 19:04:02,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-02-23 19:04:02,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 65. [2021-02-23 19:04:02,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-02-23 19:04:02,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2021-02-23 19:04:02,167 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 45 [2021-02-23 19:04:02,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:04:02,168 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2021-02-23 19:04:02,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 19:04:02,168 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2021-02-23 19:04:02,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-02-23 19:04:02,170 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:04:02,170 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] [2021-02-23 19:04:02,170 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 19:04:02,171 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:04:02,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:04:02,171 INFO L82 PathProgramCache]: Analyzing trace with hash -751621844, now seen corresponding path program 1 times [2021-02-23 19:04:02,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:04:02,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884654236] [2021-02-23 19:04:02,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:05:10,043 WARN L202 SmtUtils]: Spent 1.13 m on a formula simplification. DAG size of input: 44888 DAG size of output: 299 [2021-02-23 19:05:10,048 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:05:10,050 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:05:10,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:10,097 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:10,098 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:10,099 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:10,099 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:05:10,103 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size [2021-02-23 19:05:10,104 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size 19 [2021-02-23 19:05:10,122 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-23 19:05:10,123 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-23 19:05:10,124 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:10,124 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:10,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:05:10,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:10,160 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:10,161 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:10,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 19:05:10,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:10,168 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:10,169 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:10,173 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 19:05:10,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884654236] [2021-02-23 19:05:10,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:05:10,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 19:05:10,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658943706] [2021-02-23 19:05:10,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 19:05:10,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:05:10,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 19:05:10,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-23 19:05:10,175 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand 5 states. [2021-02-23 19:05:10,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:05:10,493 INFO L93 Difference]: Finished difference Result 106 states and 129 transitions. [2021-02-23 19:05:10,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 19:05:10,494 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2021-02-23 19:05:10,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:05:10,495 INFO L225 Difference]: With dead ends: 106 [2021-02-23 19:05:10,496 INFO L226 Difference]: Without dead ends: 80 [2021-02-23 19:05:10,496 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 [2021-02-23 19:05:10,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-02-23 19:05:10,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2021-02-23 19:05:10,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-02-23 19:05:10,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2021-02-23 19:05:10,522 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 46 [2021-02-23 19:05:10,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:05:10,522 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2021-02-23 19:05:10,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 19:05:10,522 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2021-02-23 19:05:10,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-23 19:05:10,524 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:05:10,524 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] [2021-02-23 19:05:10,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 19:05:10,524 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:05:10,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:05:10,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1780644162, now seen corresponding path program 1 times [2021-02-23 19:05:10,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:05:10,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770023598] [2021-02-23 19:05:10,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:05:15,541 WARN L202 SmtUtils]: Spent 5.00 s on a formula simplification. DAG size of input: 540 DAG size of output: 248 [2021-02-23 19:05:15,546 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:05:15,548 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:05:15,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:15,618 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:15,619 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:15,619 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:15,620 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:05:15,625 WARN L141 QuantifierPusher]: treesize reduction 1, result has 98.9 percent of original size [2021-02-23 19:05:15,626 WARN L147 QuantifierPusher]: treesize reduction 1, result has 98.9 percent of original size 91 [2021-02-23 19:05:15,672 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size [2021-02-23 19:05:15,674 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size 103 [2021-02-23 19:05:15,687 WARN L141 QuantifierPusher]: treesize reduction 125, result has 0.8 percent of original size [2021-02-23 19:05:15,688 WARN L147 QuantifierPusher]: treesize reduction 125, result has 0.8 percent of original size 1 [2021-02-23 19:05:15,689 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:15,689 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:15,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:05:15,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:15,731 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:15,732 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:15,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 19:05:15,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:15,740 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:15,741 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:15,746 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 19:05:15,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770023598] [2021-02-23 19:05:15,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:05:15,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 19:05:15,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292183587] [2021-02-23 19:05:15,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 19:05:15,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:05:15,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 19:05:15,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-23 19:05:15,749 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand 5 states. [2021-02-23 19:05:16,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:05:16,145 INFO L93 Difference]: Finished difference Result 105 states and 127 transitions. [2021-02-23 19:05:16,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 19:05:16,146 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2021-02-23 19:05:16,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:05:16,148 INFO L225 Difference]: With dead ends: 105 [2021-02-23 19:05:16,148 INFO L226 Difference]: Without dead ends: 79 [2021-02-23 19:05:16,149 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 [2021-02-23 19:05:16,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-02-23 19:05:16,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 67. [2021-02-23 19:05:16,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-02-23 19:05:16,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2021-02-23 19:05:16,177 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 47 [2021-02-23 19:05:16,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:05:16,177 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2021-02-23 19:05:16,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 19:05:16,178 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2021-02-23 19:05:16,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-23 19:05:16,179 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:05:16,179 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] [2021-02-23 19:05:16,179 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 19:05:16,179 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:05:16,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:05:16,180 INFO L82 PathProgramCache]: Analyzing trace with hash 851177254, now seen corresponding path program 1 times [2021-02-23 19:05:16,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:05:16,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547141439] [2021-02-23 19:05:16,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:05:36,336 WARN L202 SmtUtils]: Spent 20.07 s on a formula simplification. DAG size of input: 12632 DAG size of output: 237 [2021-02-23 19:05:36,340 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:05:36,341 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:05:36,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:36,454 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-23 19:05:36,455 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-23 19:05:36,480 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size [2021-02-23 19:05:36,481 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size 26 [2021-02-23 19:05:36,508 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:36,511 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 19:05:36,526 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.1 percent of original size [2021-02-23 19:05:36,527 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.1 percent of original size 109 [2021-02-23 19:05:36,596 WARN L141 QuantifierPusher]: treesize reduction 8, result has 93.5 percent of original size [2021-02-23 19:05:36,598 WARN L147 QuantifierPusher]: treesize reduction 8, result has 93.5 percent of original size 115 [2021-02-23 19:05:36,628 WARN L141 QuantifierPusher]: treesize reduction 8, result has 92.5 percent of original size [2021-02-23 19:05:36,629 WARN L147 QuantifierPusher]: treesize reduction 8, result has 92.5 percent of original size 99 [2021-02-23 19:05:36,690 WARN L141 QuantifierPusher]: treesize reduction 89, result has 49.1 percent of original size [2021-02-23 19:05:36,691 WARN L147 QuantifierPusher]: treesize reduction 89, result has 49.1 percent of original size 86 [2021-02-23 19:05:36,694 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:36,694 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:36,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:05:36,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:36,758 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:36,759 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:36,760 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:36,761 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:05:36,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 19:05:36,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:36,788 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:36,789 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:36,798 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 19:05:36,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547141439] [2021-02-23 19:05:36,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:05:36,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-23 19:05:36,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957717512] [2021-02-23 19:05:36,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-23 19:05:36,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:05:36,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-23 19:05:36,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-02-23 19:05:36,801 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand 9 states. [2021-02-23 19:05:37,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:05:37,682 INFO L93 Difference]: Finished difference Result 104 states and 125 transitions. [2021-02-23 19:05:37,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-23 19:05:37,683 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2021-02-23 19:05:37,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:05:37,684 INFO L225 Difference]: With dead ends: 104 [2021-02-23 19:05:37,684 INFO L226 Difference]: Without dead ends: 78 [2021-02-23 19:05:37,685 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 [2021-02-23 19:05:37,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-02-23 19:05:37,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 68. [2021-02-23 19:05:37,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-02-23 19:05:37,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2021-02-23 19:05:37,716 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 48 [2021-02-23 19:05:37,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:05:37,716 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2021-02-23 19:05:37,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-23 19:05:37,717 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2021-02-23 19:05:37,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-02-23 19:05:37,718 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:05:37,718 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, 1] [2021-02-23 19:05:37,718 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 19:05:37,718 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:05:37,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:05:37,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1005037432, now seen corresponding path program 1 times [2021-02-23 19:05:37,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:05:37,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1854907845] [2021-02-23 19:05:37,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:05:42,888 WARN L202 SmtUtils]: Spent 5.15 s on a formula simplification. DAG size of input: 540 DAG size of output: 248 [2021-02-23 19:05:42,900 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:05:42,902 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:05:42,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:43,009 WARN L141 QuantifierPusher]: treesize reduction 1, result has 93.8 percent of original size [2021-02-23 19:05:43,010 WARN L147 QuantifierPusher]: treesize reduction 1, result has 93.8 percent of original size 15 [2021-02-23 19:05:43,025 WARN L141 QuantifierPusher]: treesize reduction 1, result has 94.7 percent of original size [2021-02-23 19:05:43,026 WARN L147 QuantifierPusher]: treesize reduction 1, result has 94.7 percent of original size 18 [2021-02-23 19:05:43,048 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.5 percent of original size [2021-02-23 19:05:43,050 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.5 percent of original size 21 [2021-02-23 19:05:43,078 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.0 percent of original size [2021-02-23 19:05:43,079 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.0 percent of original size 24 [2021-02-23 19:05:43,116 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.4 percent of original size [2021-02-23 19:05:43,118 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.4 percent of original size 27 [2021-02-23 19:05:43,161 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.8 percent of original size [2021-02-23 19:05:43,162 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.8 percent of original size 30 [2021-02-23 19:05:43,212 WARN L141 QuantifierPusher]: treesize reduction 1, result has 97.1 percent of original size [2021-02-23 19:05:43,214 WARN L147 QuantifierPusher]: treesize reduction 1, result has 97.1 percent of original size 33 [2021-02-23 19:05:43,275 WARN L141 QuantifierPusher]: treesize reduction 1, result has 97.3 percent of original size [2021-02-23 19:05:43,278 WARN L147 QuantifierPusher]: treesize reduction 1, result has 97.3 percent of original size 36 [2021-02-23 19:05:43,338 WARN L141 QuantifierPusher]: treesize reduction 1, result has 97.5 percent of original size [2021-02-23 19:05:43,339 WARN L147 QuantifierPusher]: treesize reduction 1, result has 97.5 percent of original size 39 [2021-02-23 19:05:43,408 WARN L141 QuantifierPusher]: treesize reduction 1, result has 97.7 percent of original size [2021-02-23 19:05:43,410 WARN L147 QuantifierPusher]: treesize reduction 1, result has 97.7 percent of original size 42 [2021-02-23 19:05:43,490 WARN L141 QuantifierPusher]: treesize reduction 1, result has 97.8 percent of original size [2021-02-23 19:05:43,492 WARN L147 QuantifierPusher]: treesize reduction 1, result has 97.8 percent of original size 45 [2021-02-23 19:05:43,573 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:43,574 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-02-23 19:05:43,617 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.2 percent of original size [2021-02-23 19:05:43,619 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.2 percent of original size 108 [2021-02-23 19:05:43,749 WARN L141 QuantifierPusher]: treesize reduction 3, result has 98.7 percent of original size [2021-02-23 19:05:43,753 WARN L147 QuantifierPusher]: treesize reduction 3, result has 98.7 percent of original size 227 [2021-02-23 19:05:43,934 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2021-02-23 19:05:43,941 WARN L141 QuantifierPusher]: treesize reduction 3, result has 98.9 percent of original size [2021-02-23 19:05:43,944 WARN L147 QuantifierPusher]: treesize reduction 3, result has 98.9 percent of original size 276 [2021-02-23 19:05:44,002 WARN L141 QuantifierPusher]: treesize reduction 3, result has 98.9 percent of original size [2021-02-23 19:05:44,005 WARN L147 QuantifierPusher]: treesize reduction 3, result has 98.9 percent of original size 260 [2021-02-23 19:05:44,169 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2021-02-23 19:05:44,176 WARN L141 QuantifierPusher]: treesize reduction 3, result has 99.1 percent of original size [2021-02-23 19:05:44,179 WARN L147 QuantifierPusher]: treesize reduction 3, result has 99.1 percent of original size 324 [2021-02-23 19:05:44,185 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:44,186 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-02-23 19:05:44,188 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:44,188 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:44,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:05:44,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:44,248 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:44,249 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:44,249 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:44,250 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:05:44,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 19:05:44,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:44,286 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:44,286 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:44,307 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 19:05:44,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1854907845] [2021-02-23 19:05:44,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:05:44,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-02-23 19:05:44,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514461440] [2021-02-23 19:05:44,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-23 19:05:44,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:05:44,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-23 19:05:44,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-02-23 19:05:44,309 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand 19 states. [2021-02-23 19:05:45,012 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-02-23 19:05:45,147 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-02-23 19:05:45,295 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-02-23 19:05:45,447 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-02-23 19:05:45,609 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-02-23 19:05:45,801 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-02-23 19:05:46,024 WARN L202 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-02-23 19:05:46,243 WARN L202 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 82 [2021-02-23 19:05:46,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:05:46,982 INFO L93 Difference]: Finished difference Result 162 states and 209 transitions. [2021-02-23 19:05:46,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-23 19:05:46,983 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 49 [2021-02-23 19:05:46,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:05:46,985 INFO L225 Difference]: With dead ends: 162 [2021-02-23 19:05:46,985 INFO L226 Difference]: Without dead ends: 136 [2021-02-23 19:05:46,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=326, Invalid=730, Unknown=0, NotChecked=0, Total=1056 [2021-02-23 19:05:46,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-02-23 19:05:47,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 69. [2021-02-23 19:05:47,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2021-02-23 19:05:47,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2021-02-23 19:05:47,017 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 49 [2021-02-23 19:05:47,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:05:47,018 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2021-02-23 19:05:47,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-02-23 19:05:47,018 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2021-02-23 19:05:47,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-02-23 19:05:47,019 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:05:47,019 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, 1, 1] [2021-02-23 19:05:47,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 19:05:47,020 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:05:47,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:05:47,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1651510560, now seen corresponding path program 1 times [2021-02-23 19:05:47,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:05:47,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434476219] [2021-02-23 19:05:47,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:05:52,367 WARN L202 SmtUtils]: Spent 5.32 s on a formula simplification. DAG size of input: 540 DAG size of output: 248 [2021-02-23 19:05:52,372 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:05:52,374 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:05:52,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:52,406 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:52,406 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:52,407 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:52,407 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:05:52,412 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size [2021-02-23 19:05:52,413 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size 19 [2021-02-23 19:05:52,432 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-23 19:05:52,432 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-23 19:05:52,433 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:52,433 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:52,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:05:52,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:52,467 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:52,468 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:52,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 19:05:52,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:52,473 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:52,473 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:52,477 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 19:05:52,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434476219] [2021-02-23 19:05:52,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:05:52,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 19:05:52,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830462358] [2021-02-23 19:05:52,478 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 19:05:52,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:05:52,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 19:05:52,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-23 19:05:52,480 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand 5 states. [2021-02-23 19:05:52,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:05:52,792 INFO L93 Difference]: Finished difference Result 102 states and 121 transitions. [2021-02-23 19:05:52,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 19:05:52,792 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 50 [2021-02-23 19:05:52,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:05:52,793 INFO L225 Difference]: With dead ends: 102 [2021-02-23 19:05:52,794 INFO L226 Difference]: Without dead ends: 76 [2021-02-23 19:05:52,794 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 [2021-02-23 19:05:52,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-02-23 19:05:52,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2021-02-23 19:05:52,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2021-02-23 19:05:52,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2021-02-23 19:05:52,825 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 50 [2021-02-23 19:05:52,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:05:52,825 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2021-02-23 19:05:52,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 19:05:52,826 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2021-02-23 19:05:52,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-02-23 19:05:52,826 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:05:52,827 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, 1, 1, 1] [2021-02-23 19:05:52,827 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-23 19:05:52,827 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:05:52,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:05:52,828 INFO L82 PathProgramCache]: Analyzing trace with hash 389115954, now seen corresponding path program 1 times [2021-02-23 19:05:52,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:05:52,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1130848739] [2021-02-23 19:05:52,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:08:19,674 WARN L202 SmtUtils]: Spent 2.44 m on a formula simplification. DAG size of input: 44888 DAG size of output: 271 [2021-02-23 19:08:19,678 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:08:19,679 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:08:19,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:08:19,831 WARN L141 QuantifierPusher]: treesize reduction 1, result has 93.8 percent of original size [2021-02-23 19:08:19,833 WARN L147 QuantifierPusher]: treesize reduction 1, result has 93.8 percent of original size 15 [2021-02-23 19:08:19,853 WARN L141 QuantifierPusher]: treesize reduction 1, result has 94.7 percent of original size [2021-02-23 19:08:19,854 WARN L147 QuantifierPusher]: treesize reduction 1, result has 94.7 percent of original size 18 [2021-02-23 19:08:19,875 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.5 percent of original size [2021-02-23 19:08:19,876 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.5 percent of original size 21 [2021-02-23 19:08:19,902 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.0 percent of original size [2021-02-23 19:08:19,903 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.0 percent of original size 24 [2021-02-23 19:08:19,942 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.4 percent of original size [2021-02-23 19:08:19,943 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.4 percent of original size 27 [2021-02-23 19:08:19,988 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.8 percent of original size [2021-02-23 19:08:19,989 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.8 percent of original size 30 [2021-02-23 19:08:20,045 WARN L141 QuantifierPusher]: treesize reduction 1, result has 97.1 percent of original size [2021-02-23 19:08:20,046 WARN L147 QuantifierPusher]: treesize reduction 1, result has 97.1 percent of original size 33 [2021-02-23 19:08:20,108 WARN L141 QuantifierPusher]: treesize reduction 1, result has 97.3 percent of original size [2021-02-23 19:08:20,111 WARN L147 QuantifierPusher]: treesize reduction 1, result has 97.3 percent of original size 36 [2021-02-23 19:08:20,179 WARN L141 QuantifierPusher]: treesize reduction 1, result has 97.5 percent of original size [2021-02-23 19:08:20,181 WARN L147 QuantifierPusher]: treesize reduction 1, result has 97.5 percent of original size 39 [2021-02-23 19:08:20,261 WARN L141 QuantifierPusher]: treesize reduction 1, result has 97.7 percent of original size [2021-02-23 19:08:20,262 WARN L147 QuantifierPusher]: treesize reduction 1, result has 97.7 percent of original size 42 [2021-02-23 19:08:20,346 WARN L141 QuantifierPusher]: treesize reduction 1, result has 97.8 percent of original size [2021-02-23 19:08:20,347 WARN L147 QuantifierPusher]: treesize reduction 1, result has 97.8 percent of original size 45 [2021-02-23 19:08:20,442 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:08:20,446 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-02-23 19:08:20,495 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.2 percent of original size [2021-02-23 19:08:20,496 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.2 percent of original size 108 [2021-02-23 19:08:20,627 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-02-23 19:08:20,633 WARN L141 QuantifierPusher]: treesize reduction 2, result has 99.1 percent of original size [2021-02-23 19:08:20,636 WARN L147 QuantifierPusher]: treesize reduction 2, result has 99.1 percent of original size 227 [2021-02-23 19:08:20,839 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2021-02-23 19:08:20,849 WARN L141 QuantifierPusher]: treesize reduction 2, result has 99.3 percent of original size [2021-02-23 19:08:20,852 WARN L147 QuantifierPusher]: treesize reduction 2, result has 99.3 percent of original size 270 [2021-02-23 19:08:21,038 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2021-02-23 19:08:21,044 WARN L141 QuantifierPusher]: treesize reduction 2, result has 99.2 percent of original size [2021-02-23 19:08:21,046 WARN L147 QuantifierPusher]: treesize reduction 2, result has 99.2 percent of original size 254 [2021-02-23 19:08:21,197 WARN L141 QuantifierPusher]: treesize reduction 17, result has 89.2 percent of original size [2021-02-23 19:08:21,201 WARN L147 QuantifierPusher]: treesize reduction 17, result has 89.2 percent of original size 140 [2021-02-23 19:08:21,205 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:08:21,206 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-02-23 19:08:21,208 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:08:21,209 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:08:21,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:08:21,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:08:21,277 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:08:21,277 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:08:21,278 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:08:21,279 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:08:21,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 19:08:21,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:08:21,324 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:08:21,325 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:08:21,347 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 19:08:21,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1130848739] [2021-02-23 19:08:21,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:08:21,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-02-23 19:08:21,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660574273] [2021-02-23 19:08:21,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-23 19:08:21,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:08:21,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-23 19:08:21,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2021-02-23 19:08:21,349 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand 20 states. [2021-02-23 19:08:22,110 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-02-23 19:08:22,251 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-02-23 19:08:22,406 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-02-23 19:08:22,555 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-02-23 19:08:22,723 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-02-23 19:08:22,915 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-02-23 19:08:23,142 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-02-23 19:08:23,480 WARN L202 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 97 [2021-02-23 19:08:24,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:08:24,166 INFO L93 Difference]: Finished difference Result 140 states and 176 transitions. [2021-02-23 19:08:24,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-23 19:08:24,167 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 51 [2021-02-23 19:08:24,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:08:24,169 INFO L225 Difference]: With dead ends: 140 [2021-02-23 19:08:24,169 INFO L226 Difference]: Without dead ends: 114 [2021-02-23 19:08:24,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=330, Invalid=792, Unknown=0, NotChecked=0, Total=1122 [2021-02-23 19:08:24,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-02-23 19:08:24,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 71. [2021-02-23 19:08:24,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-02-23 19:08:24,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2021-02-23 19:08:24,210 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 51 [2021-02-23 19:08:24,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:08:24,211 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2021-02-23 19:08:24,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-02-23 19:08:24,211 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2021-02-23 19:08:24,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-02-23 19:08:24,212 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:08:24,212 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, 1, 1, 1, 1] [2021-02-23 19:08:24,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-23 19:08:24,212 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:08:24,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:08:24,213 INFO L82 PathProgramCache]: Analyzing trace with hash 81363738, now seen corresponding path program 1 times [2021-02-23 19:08:24,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:08:24,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675405434] [2021-02-23 19:08:24,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:08:29,348 WARN L202 SmtUtils]: Spent 5.12 s on a formula simplification. DAG size of input: 540 DAG size of output: 242 [2021-02-23 19:08:29,352 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:08:29,353 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:08:29,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:08:29,386 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:08:29,387 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:08:29,387 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:08:29,388 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:08:29,392 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size [2021-02-23 19:08:29,393 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size 19 [2021-02-23 19:08:29,413 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-23 19:08:29,414 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-23 19:08:29,414 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:08:29,415 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:08:29,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:08:29,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:08:29,468 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:08:29,469 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:08:29,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 19:08:29,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:08:29,476 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:08:29,477 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:08:29,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:08:29,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675405434] [2021-02-23 19:08:29,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:08:29,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 19:08:29,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893062576] [2021-02-23 19:08:29,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 19:08:29,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:08:29,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 19:08:29,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-23 19:08:29,484 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 5 states. [2021-02-23 19:08:29,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:08:29,810 INFO L93 Difference]: Finished difference Result 100 states and 117 transitions. [2021-02-23 19:08:29,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 19:08:29,810 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2021-02-23 19:08:29,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:08:29,812 INFO L225 Difference]: With dead ends: 100 [2021-02-23 19:08:29,812 INFO L226 Difference]: Without dead ends: 74 [2021-02-23 19:08:29,816 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 [2021-02-23 19:08:29,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-02-23 19:08:29,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2021-02-23 19:08:29,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-02-23 19:08:29,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2021-02-23 19:08:29,850 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 52 [2021-02-23 19:08:29,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:08:29,851 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2021-02-23 19:08:29,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 19:08:29,851 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2021-02-23 19:08:29,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-02-23 19:08:29,854 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:08:29,855 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, 1, 1, 1, 1] [2021-02-23 19:08:29,855 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-23 19:08:29,855 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:08:29,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:08:29,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1465205062, now seen corresponding path program 1 times [2021-02-23 19:08:29,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:08:29,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877878115] [2021-02-23 19:08:29,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:08:35,053 WARN L202 SmtUtils]: Spent 5.18 s on a formula simplification. DAG size of input: 540 DAG size of output: 242 [2021-02-23 19:08:35,057 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:08:35,059 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:08:35,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:08:35,116 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:08:35,117 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:08:35,117 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:08:35,118 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:08:35,121 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:08:35,122 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:08:35,131 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:08:35,132 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 19:08:35,143 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:08:35,145 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 19:08:35,160 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:08:35,161 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-23 19:08:35,179 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:08:35,180 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 19:08:35,203 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:08:35,204 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 19:08:35,230 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:08:35,231 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-23 19:08:35,262 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:08:35,263 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-02-23 19:08:35,298 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:08:35,299 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-23 19:08:35,338 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:08:35,339 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-02-23 19:08:35,389 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:08:35,390 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-23 19:08:35,431 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:08:35,432 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-02-23 19:08:35,472 WARN L141 QuantifierPusher]: treesize reduction 4, result has 98.2 percent of original size [2021-02-23 19:08:35,474 WARN L147 QuantifierPusher]: treesize reduction 4, result has 98.2 percent of original size 215 [2021-02-23 19:08:35,618 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-02-23 19:08:35,619 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:08:35,620 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:08:35,631 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:08:35,632 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:08:35,647 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:08:35,649 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:08:35,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:08:35,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:08:35,703 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:08:35,705 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:08:35,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 19:08:35,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:08:35,711 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:08:35,712 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:08:35,726 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 19:08:35,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [877878115] [2021-02-23 19:08:35,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:08:35,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-02-23 19:08:35,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647957859] [2021-02-23 19:08:35,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-23 19:08:35,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:08:35,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-23 19:08:35,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-02-23 19:08:35,729 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand 19 states. [2021-02-23 19:08:37,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:08:37,425 INFO L93 Difference]: Finished difference Result 119 states and 144 transitions. [2021-02-23 19:08:37,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-23 19:08:37,426 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 52 [2021-02-23 19:08:37,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:08:37,427 INFO L225 Difference]: With dead ends: 119 [2021-02-23 19:08:37,428 INFO L226 Difference]: Without dead ends: 117 [2021-02-23 19:08:37,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=295, Invalid=965, Unknown=0, NotChecked=0, Total=1260 [2021-02-23 19:08:37,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-02-23 19:08:37,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2021-02-23 19:08:37,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-02-23 19:08:37,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2021-02-23 19:08:37,466 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 52 [2021-02-23 19:08:37,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:08:37,466 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2021-02-23 19:08:37,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-02-23 19:08:37,467 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2021-02-23 19:08:37,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-02-23 19:08:37,467 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:08:37,467 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, 1, 1, 1, 1] [2021-02-23 19:08:37,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-23 19:08:37,468 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:08:37,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:08:37,468 INFO L82 PathProgramCache]: Analyzing trace with hash -2035321656, now seen corresponding path program 2 times [2021-02-23 19:08:37,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:08:37,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1225630903] [2021-02-23 19:08:37,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:08:46,668 WARN L202 SmtUtils]: Spent 9.19 s on a formula simplification. DAG size of input: 540 DAG size of output: 274 [2021-02-23 19:09:04,528 WARN L202 SmtUtils]: Spent 15.64 s on a formula simplification. DAG size of input: 608 DAG size of output: 278 [2021-02-23 19:09:04,532 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:09:04,533 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:09:04,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:09:04,585 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-23 19:09:04,586 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-23 19:09:04,611 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size [2021-02-23 19:09:04,612 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size 26 [2021-02-23 19:09:04,643 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:09:04,644 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 19:09:04,660 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:09:04,661 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-23 19:09:04,680 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size [2021-02-23 19:09:04,681 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size 101 [2021-02-23 19:09:04,759 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.1 percent of original size [2021-02-23 19:09:04,760 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.1 percent of original size 107 [2021-02-23 19:09:04,786 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size [2021-02-23 19:09:04,788 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size 103 [2021-02-23 19:09:04,848 WARN L141 QuantifierPusher]: treesize reduction 125, result has 0.8 percent of original size [2021-02-23 19:09:04,849 WARN L147 QuantifierPusher]: treesize reduction 125, result has 0.8 percent of original size 1 [2021-02-23 19:09:04,849 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:09:04,850 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:09:04,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:09:04,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:09:04,906 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:09:04,907 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:09:04,908 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:09:04,909 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:09:04,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 19:09:04,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:09:04,945 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:09:04,946 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:09:04,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-02-23 19:09:04,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:09:04,952 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:09:04,953 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:09:04,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:09:04,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1225630903] [2021-02-23 19:09:04,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:09:04,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-23 19:09:04,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903033449] [2021-02-23 19:09:04,968 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-23 19:09:04,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:09:04,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-23 19:09:04,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-02-23 19:09:04,969 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand 10 states. [2021-02-23 19:09:06,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:09:06,104 INFO L93 Difference]: Finished difference Result 123 states and 147 transitions. [2021-02-23 19:09:06,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-23 19:09:06,105 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2021-02-23 19:09:06,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:09:06,106 INFO L225 Difference]: With dead ends: 123 [2021-02-23 19:09:06,106 INFO L226 Difference]: Without dead ends: 97 [2021-02-23 19:09:06,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-02-23 19:09:06,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-02-23 19:09:06,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 81. [2021-02-23 19:09:06,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-02-23 19:09:06,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2021-02-23 19:09:06,142 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 61 [2021-02-23 19:09:06,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:09:06,142 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2021-02-23 19:09:06,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-23 19:09:06,142 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2021-02-23 19:09:06,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-02-23 19:09:06,143 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:09:06,143 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, 1, 1, 1, 1] [2021-02-23 19:09:06,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-23 19:09:06,143 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:09:06,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:09:06,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1202559720, now seen corresponding path program 1 times [2021-02-23 19:09:06,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:09:06,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160098797] [2021-02-23 19:09:06,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:09:11,836 WARN L202 SmtUtils]: Spent 5.68 s on a formula simplification. DAG size of input: 540 DAG size of output: 242 [2021-02-23 19:09:38,237 WARN L202 SmtUtils]: Spent 22.26 s on a formula simplification. DAG size of input: 608 DAG size of output: 310 [2021-02-23 19:09:38,242 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:09:38,243 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:09:38,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:09:38,277 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:09:38,278 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:09:38,278 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:09:38,279 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:09:38,286 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:09:38,287 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:09:38,304 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size [2021-02-23 19:09:38,305 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size 19 [2021-02-23 19:09:38,346 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-23 19:09:38,348 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-23 19:09:38,349 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:09:38,349 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:09:38,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:09:38,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:09:38,411 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:09:38,412 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:09:38,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-23 19:09:38,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:09:38,418 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:09:38,418 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:09:38,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-02-23 19:09:38,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:09:38,424 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:09:38,425 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:09:38,431 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 19:09:38,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160098797] [2021-02-23 19:09:38,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:09:38,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 19:09:38,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929389946] [2021-02-23 19:09:38,432 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 19:09:38,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:09:38,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 19:09:38,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 19:09:38,434 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand 6 states. [2021-02-23 19:09:39,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:09:39,200 INFO L93 Difference]: Finished difference Result 122 states and 145 transitions. [2021-02-23 19:09:39,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-23 19:09:39,201 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 62 [2021-02-23 19:09:39,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:09:39,202 INFO L225 Difference]: With dead ends: 122 [2021-02-23 19:09:39,202 INFO L226 Difference]: Without dead ends: 96 [2021-02-23 19:09:39,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-02-23 19:09:39,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-02-23 19:09:39,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 82. [2021-02-23 19:09:39,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2021-02-23 19:09:39,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2021-02-23 19:09:39,233 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 62 [2021-02-23 19:09:39,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:09:39,233 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2021-02-23 19:09:39,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 19:09:39,233 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2021-02-23 19:09:39,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-02-23 19:09:39,234 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:09:39,234 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, 1, 1, 1, 1, 1, 1] [2021-02-23 19:09:39,234 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-23 19:09:39,234 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:09:39,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:09:39,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1330557822, now seen corresponding path program 1 times [2021-02-23 19:09:39,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:09:39,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309072497] [2021-02-23 19:09:39,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:09:46,650 WARN L202 SmtUtils]: Spent 7.40 s on a formula simplification. DAG size of input: 540 DAG size of output: 232