/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/sumt7.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 00:30:39,942 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 00:30:39,947 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 00:30:40,005 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 00:30:40,035 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 00:30:40,038 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 00:30:40,041 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 00:30:40,043 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 00:30:40,047 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 00:30:40,049 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 00:30:40,056 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 00:30:40,065 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 00:30:40,067 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 00:30:40,069 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 00:30:40,072 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 00:30:40,074 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 00:30:40,084 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 00:30:40,117 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-24 00:30:40,138 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 00:30:40,138 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 00:30:40,142 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 00:30:40,143 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 00:30:40,143 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 00:30:40,143 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 00:30:40,143 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 00:30:40,144 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 00:30:40,144 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 00:30:40,144 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 00:30:40,145 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 00:30:40,145 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 00:30:40,145 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 00:30:40,146 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 00:30:40,146 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 00:30:40,146 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 00:30:40,146 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 00:30:40,147 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 00:30:40,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 00:30:40,147 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 00:30:40,147 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 00:30:40,147 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 00:30:40,148 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-24 00:30:40,552 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 00:30:40,580 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 00:30:40,583 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 00:30:40,585 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 00:30:40,586 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 00:30:40,587 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt7.c [2021-02-24 00:30:40,674 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6dbc9d87/f632503ff4254d7fbef97d5967f5266c/FLAGe314e167b [2021-02-24 00:30:41,221 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 00:30:41,221 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt7.c [2021-02-24 00:30:41,230 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6dbc9d87/f632503ff4254d7fbef97d5967f5266c/FLAGe314e167b [2021-02-24 00:30:41,585 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6dbc9d87/f632503ff4254d7fbef97d5967f5266c [2021-02-24 00:30:41,588 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 00:30:41,603 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 00:30:41,606 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 00:30:41,606 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 00:30:41,611 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 00:30:41,612 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:30:41" (1/1) ... [2021-02-24 00:30:41,614 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37c82636 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:30:41, skipping insertion in model container [2021-02-24 00:30:41,614 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:30:41" (1/1) ... [2021-02-24 00:30:41,623 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 00:30:41,640 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 00:30:41,806 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt7.c[403,416] [2021-02-24 00:30:41,828 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:30:41,838 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 00:30:41,854 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt7.c[403,416] [2021-02-24 00:30:41,863 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:30:41,883 INFO L208 MainTranslator]: Completed translation [2021-02-24 00:30:41,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:30:41 WrapperNode [2021-02-24 00:30:41,884 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 00:30:41,885 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 00:30:41,886 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 00:30:41,886 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 00:30:41,903 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:30:41" (1/1) ... [2021-02-24 00:30:41,903 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:30:41" (1/1) ... [2021-02-24 00:30:41,912 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:30:41" (1/1) ... [2021-02-24 00:30:41,912 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:30:41" (1/1) ... [2021-02-24 00:30:41,919 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:30:41" (1/1) ... [2021-02-24 00:30:41,925 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:30:41" (1/1) ... [2021-02-24 00:30:41,927 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:30:41" (1/1) ... [2021-02-24 00:30:41,929 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 00:30:41,931 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 00:30:41,931 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 00:30:41,931 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 00:30:41,932 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:30:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 00:30:42,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 00:30:42,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 00:30:42,059 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 00:30:42,059 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-24 00:30:42,060 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 00:30:42,061 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 00:30:42,061 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 00:30:42,062 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 00:30:42,062 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 00:30:42,062 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 00:30:42,064 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-24 00:30:42,064 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 00:30:42,065 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-24 00:30:42,066 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 00:30:42,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 00:30:42,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 00:30:42,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 00:30:42,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 00:30:42,069 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 00:30:42,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 00:30:42,843 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 00:30:42,843 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-24 00:30:42,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:30:42 BoogieIcfgContainer [2021-02-24 00:30:42,846 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 00:30:42,851 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 00:30:42,851 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 00:30:42,855 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 00:30:42,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 12:30:41" (1/3) ... [2021-02-24 00:30:42,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73cb5744 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:30:42, skipping insertion in model container [2021-02-24 00:30:42,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:30:41" (2/3) ... [2021-02-24 00:30:42,858 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73cb5744 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:30:42, skipping insertion in model container [2021-02-24 00:30:42,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:30:42" (3/3) ... [2021-02-24 00:30:42,860 INFO L111 eAbstractionObserver]: Analyzing ICFG sumt7.c [2021-02-24 00:30:42,869 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 00:30:42,876 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 00:30:42,905 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 00:30:42,943 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 00:30:42,944 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 00:30:42,944 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-24 00:30:42,944 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 00:30:42,944 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 00:30:42,945 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 00:30:42,945 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 00:30:42,945 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 00:30:42,969 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2021-02-24 00:30:42,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-24 00:30:42,988 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:30:42,990 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:30:42,991 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:30:43,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:30:43,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1439556865, now seen corresponding path program 1 times [2021-02-24 00:30:43,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:30:43,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56889234] [2021-02-24 00:30:43,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:30:43,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:43,455 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:43,457 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:43,459 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:43,464 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:30:43,494 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:43,495 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:30:43,519 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:43,521 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-24 00:30:43,549 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:43,551 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-24 00:30:43,585 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:43,587 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-24 00:30:43,630 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:43,632 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-24 00:30:43,689 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:43,691 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-24 00:30:43,751 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:43,753 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 00:30:43,815 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:43,816 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-02-24 00:30:43,882 WARN L141 QuantifierPusher]: treesize reduction 32, result has 83.0 percent of original size [2021-02-24 00:30:43,889 WARN L147 QuantifierPusher]: treesize reduction 32, result has 83.0 percent of original size 156 [2021-02-24 00:30:44,061 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-02-24 00:30:44,064 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:44,065 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:30:44,083 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:44,084 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:30:44,104 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:44,105 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:44,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:30:44,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:44,255 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:44,256 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:44,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:30:44,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56889234] [2021-02-24 00:30:44,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:30:44,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-02-24 00:30:44,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058470994] [2021-02-24 00:30:44,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-24 00:30:44,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:30:44,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-24 00:30:44,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-02-24 00:30:44,318 INFO L87 Difference]: Start difference. First operand 55 states. Second operand 15 states. [2021-02-24 00:30:44,764 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-02-24 00:30:44,928 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-02-24 00:30:45,086 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-02-24 00:30:45,743 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-02-24 00:30:46,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:30:46,600 INFO L93 Difference]: Finished difference Result 168 states and 229 transitions. [2021-02-24 00:30:46,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-24 00:30:46,602 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2021-02-24 00:30:46,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:30:46,615 INFO L225 Difference]: With dead ends: 168 [2021-02-24 00:30:46,616 INFO L226 Difference]: Without dead ends: 119 [2021-02-24 00:30:46,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2021-02-24 00:30:46,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-02-24 00:30:46,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 57. [2021-02-24 00:30:46,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-02-24 00:30:46,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2021-02-24 00:30:46,709 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 34 [2021-02-24 00:30:46,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:30:46,711 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2021-02-24 00:30:46,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-02-24 00:30:46,711 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2021-02-24 00:30:46,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-02-24 00:30:46,713 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:30:46,713 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:30:46,714 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 00:30:46,714 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:30:46,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:30:46,715 INFO L82 PathProgramCache]: Analyzing trace with hash 804824585, now seen corresponding path program 1 times [2021-02-24 00:30:46,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:30:46,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276656250] [2021-02-24 00:30:46,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:30:46,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:46,908 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:46,909 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:46,910 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:46,911 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:30:46,920 WARN L141 QuantifierPusher]: treesize reduction 1, result has 98.9 percent of original size [2021-02-24 00:30:46,922 WARN L147 QuantifierPusher]: treesize reduction 1, result has 98.9 percent of original size 91 [2021-02-24 00:30:46,992 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size [2021-02-24 00:30:46,995 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size 103 [2021-02-24 00:30:47,016 WARN L141 QuantifierPusher]: treesize reduction 125, result has 0.8 percent of original size [2021-02-24 00:30:47,017 WARN L147 QuantifierPusher]: treesize reduction 125, result has 0.8 percent of original size 1 [2021-02-24 00:30:47,018 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:47,020 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:47,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:30:47,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:47,117 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:47,122 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:47,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-24 00:30:47,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:47,146 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:47,148 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:47,155 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:30:47,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276656250] [2021-02-24 00:30:47,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:30:47,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-02-24 00:30:47,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348003609] [2021-02-24 00:30:47,158 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-24 00:30:47,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:30:47,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-24 00:30:47,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-24 00:30:47,161 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand 5 states. [2021-02-24 00:30:47,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:30:47,724 INFO L93 Difference]: Finished difference Result 93 states and 111 transitions. [2021-02-24 00:30:47,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-24 00:30:47,725 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2021-02-24 00:30:47,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:30:47,731 INFO L225 Difference]: With dead ends: 93 [2021-02-24 00:30:47,731 INFO L226 Difference]: Without dead ends: 71 [2021-02-24 00:30:47,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-24 00:30:47,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-02-24 00:30:47,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 59. [2021-02-24 00:30:47,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-02-24 00:30:47,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2021-02-24 00:30:47,780 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 43 [2021-02-24 00:30:47,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:30:47,781 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2021-02-24 00:30:47,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-24 00:30:47,782 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2021-02-24 00:30:47,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-24 00:30:47,787 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:30:47,788 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:30:47,788 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 00:30:47,788 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:30:47,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:30:47,791 INFO L82 PathProgramCache]: Analyzing trace with hash -603670227, now seen corresponding path program 1 times [2021-02-24 00:30:47,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:30:47,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1677966507] [2021-02-24 00:30:47,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:30:47,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:47,947 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:47,949 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:47,950 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:47,952 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:30:47,961 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:47,962 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 86 [2021-02-24 00:30:47,985 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:47,986 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:48,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:30:48,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:48,051 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:48,052 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:48,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-24 00:30:48,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:48,061 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:48,062 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:48,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:30:48,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1677966507] [2021-02-24 00:30:48,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:30:48,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-02-24 00:30:48,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65693295] [2021-02-24 00:30:48,068 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-24 00:30:48,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:30:48,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-24 00:30:48,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-24 00:30:48,070 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand 5 states. [2021-02-24 00:30:48,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:30:48,520 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2021-02-24 00:30:48,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-24 00:30:48,521 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2021-02-24 00:30:48,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:30:48,523 INFO L225 Difference]: With dead ends: 83 [2021-02-24 00:30:48,523 INFO L226 Difference]: Without dead ends: 61 [2021-02-24 00:30:48,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-24 00:30:48,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-02-24 00:30:48,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2021-02-24 00:30:48,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-02-24 00:30:48,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2021-02-24 00:30:48,555 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 44 [2021-02-24 00:30:48,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:30:48,555 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2021-02-24 00:30:48,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-24 00:30:48,555 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2021-02-24 00:30:48,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-02-24 00:30:48,556 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:30:48,557 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:30:48,557 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-24 00:30:48,557 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:30:48,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:30:48,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1145561533, now seen corresponding path program 1 times [2021-02-24 00:30:48,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:30:48,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [321903550] [2021-02-24 00:30:48,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:30:48,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:48,771 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-24 00:30:48,778 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-24 00:30:48,815 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.4 percent of original size [2021-02-24 00:30:48,821 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.4 percent of original size 27 [2021-02-24 00:30:48,878 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:48,879 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-24 00:30:48,902 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.4 percent of original size [2021-02-24 00:30:48,908 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.4 percent of original size 124 [2021-02-24 00:30:49,047 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2021-02-24 00:30:49,053 WARN L141 QuantifierPusher]: treesize reduction 9, result has 92.6 percent of original size [2021-02-24 00:30:49,055 WARN L147 QuantifierPusher]: treesize reduction 9, result has 92.6 percent of original size 113 [2021-02-24 00:30:49,087 WARN L141 QuantifierPusher]: treesize reduction 9, result has 91.4 percent of original size [2021-02-24 00:30:49,091 WARN L147 QuantifierPusher]: treesize reduction 9, result has 91.4 percent of original size 96 [2021-02-24 00:30:49,158 WARN L141 QuantifierPusher]: treesize reduction 49, result has 63.7 percent of original size [2021-02-24 00:30:49,160 WARN L147 QuantifierPusher]: treesize reduction 49, result has 63.7 percent of original size 86 [2021-02-24 00:30:49,162 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:49,163 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:49,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:30:49,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:49,249 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:49,250 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:49,252 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:49,253 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:30:49,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-24 00:30:49,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:49,298 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:49,300 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:49,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:30:49,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [321903550] [2021-02-24 00:30:49,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:30:49,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-02-24 00:30:49,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825414871] [2021-02-24 00:30:49,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-24 00:30:49,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:30:49,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-24 00:30:49,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-02-24 00:30:49,332 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand 9 states. [2021-02-24 00:30:49,616 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-02-24 00:30:49,805 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-02-24 00:30:50,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:30:50,295 INFO L93 Difference]: Finished difference Result 91 states and 107 transitions. [2021-02-24 00:30:50,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-24 00:30:50,296 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2021-02-24 00:30:50,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:30:50,300 INFO L225 Difference]: With dead ends: 91 [2021-02-24 00:30:50,300 INFO L226 Difference]: Without dead ends: 69 [2021-02-24 00:30:50,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-02-24 00:30:50,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-02-24 00:30:50,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 61. [2021-02-24 00:30:50,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2021-02-24 00:30:50,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2021-02-24 00:30:50,350 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 45 [2021-02-24 00:30:50,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:30:50,351 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2021-02-24 00:30:50,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-24 00:30:50,351 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2021-02-24 00:30:50,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-02-24 00:30:50,359 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:30:50,359 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] [2021-02-24 00:30:50,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-24 00:30:50,360 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:30:50,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:30:50,360 INFO L82 PathProgramCache]: Analyzing trace with hash -592547929, now seen corresponding path program 1 times [2021-02-24 00:30:50,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:30:50,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438176301] [2021-02-24 00:30:50,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:30:50,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:50,434 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:50,437 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:50,438 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:50,439 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:30:50,445 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size [2021-02-24 00:30:50,447 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size 19 [2021-02-24 00:30:50,478 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-24 00:30:50,481 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-24 00:30:50,482 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:50,483 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:50,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:30:50,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:50,547 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:50,548 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:50,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-24 00:30:50,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:50,555 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:50,556 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:50,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:30:50,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438176301] [2021-02-24 00:30:50,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:30:50,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-02-24 00:30:50,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748373493] [2021-02-24 00:30:50,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-24 00:30:50,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:30:50,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-24 00:30:50,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-24 00:30:50,562 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand 5 states. [2021-02-24 00:30:50,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:30:50,996 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2021-02-24 00:30:50,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-24 00:30:50,997 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2021-02-24 00:30:50,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:30:51,000 INFO L225 Difference]: With dead ends: 90 [2021-02-24 00:30:51,001 INFO L226 Difference]: Without dead ends: 68 [2021-02-24 00:30:51,002 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 [2021-02-24 00:30:51,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-02-24 00:30:51,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2021-02-24 00:30:51,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-02-24 00:30:51,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2021-02-24 00:30:51,064 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 46 [2021-02-24 00:30:51,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:30:51,065 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2021-02-24 00:30:51,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-24 00:30:51,066 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2021-02-24 00:30:51,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-24 00:30:51,069 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:30:51,069 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] [2021-02-24 00:30:51,070 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-24 00:30:51,070 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:30:51,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:30:51,071 INFO L82 PathProgramCache]: Analyzing trace with hash -457220483, now seen corresponding path program 1 times [2021-02-24 00:30:51,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:30:51,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389858237] [2021-02-24 00:30:51,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:30:51,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:51,191 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-24 00:30:51,192 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-24 00:30:51,220 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size [2021-02-24 00:30:51,222 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size 26 [2021-02-24 00:30:51,265 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:51,271 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-24 00:30:51,293 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.2 percent of original size [2021-02-24 00:30:51,296 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.2 percent of original size 118 [2021-02-24 00:30:51,356 WARN L141 QuantifierPusher]: treesize reduction 7, result has 93.9 percent of original size [2021-02-24 00:30:51,357 WARN L147 QuantifierPusher]: treesize reduction 7, result has 93.9 percent of original size 108 [2021-02-24 00:30:51,382 WARN L141 QuantifierPusher]: treesize reduction 7, result has 92.9 percent of original size [2021-02-24 00:30:51,384 WARN L147 QuantifierPusher]: treesize reduction 7, result has 92.9 percent of original size 92 [2021-02-24 00:30:51,420 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-24 00:30:51,422 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-24 00:30:51,423 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:51,424 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:51,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:30:51,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:51,495 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:51,496 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:51,497 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:51,498 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:30:51,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-24 00:30:51,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:51,539 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:51,540 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:51,551 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:30:51,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [389858237] [2021-02-24 00:30:51,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:30:51,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-02-24 00:30:51,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894168971] [2021-02-24 00:30:51,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-24 00:30:51,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:30:51,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-24 00:30:51,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-02-24 00:30:51,556 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand 9 states. [2021-02-24 00:30:51,801 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-02-24 00:30:51,980 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-02-24 00:30:52,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:30:52,360 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2021-02-24 00:30:52,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-24 00:30:52,361 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2021-02-24 00:30:52,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:30:52,364 INFO L225 Difference]: With dead ends: 86 [2021-02-24 00:30:52,365 INFO L226 Difference]: Without dead ends: 64 [2021-02-24 00:30:52,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-02-24 00:30:52,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-02-24 00:30:52,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-02-24 00:30:52,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-02-24 00:30:52,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2021-02-24 00:30:52,403 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 47 [2021-02-24 00:30:52,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:30:52,403 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2021-02-24 00:30:52,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-24 00:30:52,403 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2021-02-24 00:30:52,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-24 00:30:52,404 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:30:52,404 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] [2021-02-24 00:30:52,405 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-24 00:30:52,405 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:30:52,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:30:52,405 INFO L82 PathProgramCache]: Analyzing trace with hash -385262047, now seen corresponding path program 1 times [2021-02-24 00:30:52,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:30:52,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209227379] [2021-02-24 00:30:52,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:30:52,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:52,462 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:52,463 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:52,464 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:52,465 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:30:52,472 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size [2021-02-24 00:30:52,475 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size 19 [2021-02-24 00:30:52,509 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-24 00:30:52,511 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-24 00:30:52,512 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:52,513 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:52,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:30:52,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:52,566 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:52,567 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:52,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-24 00:30:52,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:52,574 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:52,574 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:52,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:30:52,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209227379] [2021-02-24 00:30:52,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:30:52,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-02-24 00:30:52,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133479858] [2021-02-24 00:30:52,581 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-24 00:30:52,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:30:52,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-24 00:30:52,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-24 00:30:52,582 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand 5 states. [2021-02-24 00:30:52,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:30:52,972 INFO L93 Difference]: Finished difference Result 88 states and 101 transitions. [2021-02-24 00:30:52,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-24 00:30:52,973 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 48 [2021-02-24 00:30:52,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:30:52,975 INFO L225 Difference]: With dead ends: 88 [2021-02-24 00:30:52,975 INFO L226 Difference]: Without dead ends: 66 [2021-02-24 00:30:52,976 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 [2021-02-24 00:30:52,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-02-24 00:30:53,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2021-02-24 00:30:53,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-02-24 00:30:53,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2021-02-24 00:30:53,007 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 48 [2021-02-24 00:30:53,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:30:53,007 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2021-02-24 00:30:53,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-24 00:30:53,007 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2021-02-24 00:30:53,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-24 00:30:53,008 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:30:53,008 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] [2021-02-24 00:30:53,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-24 00:30:53,009 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:30:53,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:30:53,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1931830847, now seen corresponding path program 1 times [2021-02-24 00:30:53,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:30:53,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1723997023] [2021-02-24 00:30:53,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:30:53,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:53,070 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:53,070 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:53,071 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:53,073 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:30:53,079 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:53,080 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:30:53,095 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:53,097 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-24 00:30:53,115 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:53,116 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-24 00:30:53,155 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:53,156 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-24 00:30:53,184 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:53,185 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-24 00:30:53,215 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:53,216 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-24 00:30:53,257 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:53,258 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 00:30:53,304 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:53,305 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-02-24 00:30:53,352 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:53,353 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 00:30:53,396 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:53,397 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-02-24 00:30:53,442 WARN L141 QuantifierPusher]: treesize reduction 32, result has 83.4 percent of original size [2021-02-24 00:30:53,444 WARN L147 QuantifierPusher]: treesize reduction 32, result has 83.4 percent of original size 161 [2021-02-24 00:30:53,579 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-02-24 00:30:53,581 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:53,582 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:30:53,600 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:53,601 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:30:53,619 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:53,619 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:53,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:30:53,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:53,685 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:53,686 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:53,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-24 00:30:53,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:53,694 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:53,695 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:53,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:30:53,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1723997023] [2021-02-24 00:30:53,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:30:53,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-02-24 00:30:53,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013935440] [2021-02-24 00:30:53,709 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-24 00:30:53,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:30:53,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-24 00:30:53,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-02-24 00:30:53,710 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand 17 states. [2021-02-24 00:30:54,493 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-02-24 00:30:55,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:30:55,671 INFO L93 Difference]: Finished difference Result 103 states and 122 transitions. [2021-02-24 00:30:55,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-24 00:30:55,672 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2021-02-24 00:30:55,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:30:55,674 INFO L225 Difference]: With dead ends: 103 [2021-02-24 00:30:55,674 INFO L226 Difference]: Without dead ends: 101 [2021-02-24 00:30:55,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=217, Invalid=775, Unknown=0, NotChecked=0, Total=992 [2021-02-24 00:30:55,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-02-24 00:30:55,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 71. [2021-02-24 00:30:55,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-02-24 00:30:55,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2021-02-24 00:30:55,721 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 48 [2021-02-24 00:30:55,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:30:55,722 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2021-02-24 00:30:55,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-02-24 00:30:55,722 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2021-02-24 00:30:55,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-02-24 00:30:55,723 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:30:55,723 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:30:55,724 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-24 00:30:55,724 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:30:55,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:30:55,724 INFO L82 PathProgramCache]: Analyzing trace with hash 262513031, now seen corresponding path program 2 times [2021-02-24 00:30:55,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:30:55,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265804365] [2021-02-24 00:30:55,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:30:55,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:55,838 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-24 00:30:55,842 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-24 00:30:55,869 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size [2021-02-24 00:30:55,871 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size 26 [2021-02-24 00:30:55,907 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:55,908 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-24 00:30:55,923 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:55,924 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-24 00:30:55,943 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size [2021-02-24 00:30:55,944 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size 101 [2021-02-24 00:30:56,030 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.1 percent of original size [2021-02-24 00:30:56,032 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.1 percent of original size 107 [2021-02-24 00:30:56,074 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size [2021-02-24 00:30:56,075 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size 103 [2021-02-24 00:30:56,113 WARN L141 QuantifierPusher]: treesize reduction 125, result has 0.8 percent of original size [2021-02-24 00:30:56,114 WARN L147 QuantifierPusher]: treesize reduction 125, result has 0.8 percent of original size 1 [2021-02-24 00:30:56,115 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:56,116 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:56,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:30:56,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:56,200 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:56,200 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:56,201 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:56,203 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:30:56,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-24 00:30:56,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:56,241 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:56,242 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:56,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-24 00:30:56,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:56,247 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:56,248 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:56,265 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-24 00:30:56,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1265804365] [2021-02-24 00:30:56,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:30:56,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-02-24 00:30:56,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096790556] [2021-02-24 00:30:56,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-24 00:30:56,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:30:56,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-24 00:30:56,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-02-24 00:30:56,270 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand 9 states. [2021-02-24 00:30:56,527 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-02-24 00:30:56,701 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-02-24 00:30:57,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:30:57,343 INFO L93 Difference]: Finished difference Result 107 states and 125 transitions. [2021-02-24 00:30:57,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-24 00:30:57,344 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 57 [2021-02-24 00:30:57,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:30:57,345 INFO L225 Difference]: With dead ends: 107 [2021-02-24 00:30:57,345 INFO L226 Difference]: Without dead ends: 85 [2021-02-24 00:30:57,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-02-24 00:30:57,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-02-24 00:30:57,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 73. [2021-02-24 00:30:57,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-02-24 00:30:57,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2021-02-24 00:30:57,373 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 57 [2021-02-24 00:30:57,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:30:57,373 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2021-02-24 00:30:57,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-24 00:30:57,373 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2021-02-24 00:30:57,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-02-24 00:30:57,374 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:30:57,374 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:30:57,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-24 00:30:57,375 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:30:57,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:30:57,375 INFO L82 PathProgramCache]: Analyzing trace with hash -235459217, now seen corresponding path program 1 times [2021-02-24 00:30:57,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:30:57,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [246168169] [2021-02-24 00:30:57,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:30:57,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:57,443 WARN L141 QuantifierPusher]: treesize reduction 1, result has 93.8 percent of original size [2021-02-24 00:30:57,445 WARN L147 QuantifierPusher]: treesize reduction 1, result has 93.8 percent of original size 15 [2021-02-24 00:30:57,468 WARN L141 QuantifierPusher]: treesize reduction 1, result has 94.7 percent of original size [2021-02-24 00:30:57,469 WARN L147 QuantifierPusher]: treesize reduction 1, result has 94.7 percent of original size 18 [2021-02-24 00:30:57,502 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:57,503 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-24 00:30:57,520 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:57,521 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-02-24 00:30:57,540 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:57,542 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 104 [2021-02-24 00:30:57,610 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:57,611 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 102 [2021-02-24 00:30:57,673 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:57,674 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 86 [2021-02-24 00:30:57,724 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:57,725 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:57,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:30:57,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:57,804 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:57,805 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:57,806 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:57,808 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:30:57,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-24 00:30:57,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:57,845 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:57,846 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:57,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-24 00:30:57,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:57,853 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:57,855 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:57,871 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-24 00:30:57,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [246168169] [2021-02-24 00:30:57,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:30:57,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-02-24 00:30:57,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573135984] [2021-02-24 00:30:57,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-24 00:30:57,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:30:57,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-24 00:30:57,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-02-24 00:30:57,874 INFO L87 Difference]: Start difference. First operand 73 states and 79 transitions. Second operand 11 states. [2021-02-24 00:30:58,151 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-02-24 00:30:58,377 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-02-24 00:31:00,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:31:00,346 INFO L93 Difference]: Finished difference Result 106 states and 123 transitions. [2021-02-24 00:31:00,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-24 00:31:00,347 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 58 [2021-02-24 00:31:00,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:31:00,349 INFO L225 Difference]: With dead ends: 106 [2021-02-24 00:31:00,349 INFO L226 Difference]: Without dead ends: 84 [2021-02-24 00:31:00,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-02-24 00:31:00,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-02-24 00:31:00,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 74. [2021-02-24 00:31:00,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-02-24 00:31:00,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2021-02-24 00:31:00,377 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 58 [2021-02-24 00:31:00,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:31:00,378 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2021-02-24 00:31:00,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-24 00:31:00,378 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2021-02-24 00:31:00,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-24 00:31:00,379 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:31:00,379 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] [2021-02-24 00:31:00,379 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-24 00:31:00,379 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:31:00,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:31:00,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1679045185, now seen corresponding path program 1 times [2021-02-24 00:31:00,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:31:00,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2082810478] [2021-02-24 00:31:00,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:31:00,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:00,444 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-24 00:31:00,445 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-24 00:31:00,472 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size [2021-02-24 00:31:00,473 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size 26 [2021-02-24 00:31:00,507 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:00,508 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-24 00:31:00,523 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:00,524 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-02-24 00:31:00,547 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.1 percent of original size [2021-02-24 00:31:00,548 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.1 percent of original size 109 [2021-02-24 00:31:00,631 WARN L141 QuantifierPusher]: treesize reduction 8, result has 93.5 percent of original size [2021-02-24 00:31:00,633 WARN L147 QuantifierPusher]: treesize reduction 8, result has 93.5 percent of original size 115 [2021-02-24 00:31:00,666 WARN L141 QuantifierPusher]: treesize reduction 8, result has 92.5 percent of original size [2021-02-24 00:31:00,667 WARN L147 QuantifierPusher]: treesize reduction 8, result has 92.5 percent of original size 99 [2021-02-24 00:31:00,739 WARN L141 QuantifierPusher]: treesize reduction 89, result has 49.1 percent of original size [2021-02-24 00:31:00,740 WARN L147 QuantifierPusher]: treesize reduction 89, result has 49.1 percent of original size 86 [2021-02-24 00:31:00,743 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:00,744 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:00,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:31:00,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:00,837 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:00,837 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:00,839 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:00,839 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:31:00,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-24 00:31:00,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:00,872 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:00,880 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:00,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-24 00:31:00,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:00,888 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:00,889 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:00,905 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-24 00:31:00,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2082810478] [2021-02-24 00:31:00,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:31:00,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-02-24 00:31:00,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605573521] [2021-02-24 00:31:00,906 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-24 00:31:00,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:31:00,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-24 00:31:00,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-02-24 00:31:00,908 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand 10 states. [2021-02-24 00:31:01,171 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-02-24 00:31:01,357 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-02-24 00:31:02,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:31:02,118 INFO L93 Difference]: Finished difference Result 105 states and 121 transitions. [2021-02-24 00:31:02,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-24 00:31:02,120 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2021-02-24 00:31:02,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:31:02,121 INFO L225 Difference]: With dead ends: 105 [2021-02-24 00:31:02,121 INFO L226 Difference]: Without dead ends: 83 [2021-02-24 00:31:02,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-02-24 00:31:02,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-02-24 00:31:02,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 75. [2021-02-24 00:31:02,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2021-02-24 00:31:02,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2021-02-24 00:31:02,166 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 59 [2021-02-24 00:31:02,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:31:02,166 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2021-02-24 00:31:02,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-24 00:31:02,167 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2021-02-24 00:31:02,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-02-24 00:31:02,167 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:31:02,168 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:31:02,168 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-24 00:31:02,168 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:31:02,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:31:02,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1070914409, now seen corresponding path program 1 times [2021-02-24 00:31:02,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:31:02,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2076797290] [2021-02-24 00:31:02,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:31:02,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:02,201 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:02,202 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:02,203 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:02,203 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:31:02,209 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:02,209 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:31:02,221 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size [2021-02-24 00:31:02,222 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size 19 [2021-02-24 00:31:02,251 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-24 00:31:02,252 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-24 00:31:02,253 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:02,253 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:02,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:31:02,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:02,312 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:02,313 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:02,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-24 00:31:02,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:02,318 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:02,319 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:02,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-24 00:31:02,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:02,325 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:02,326 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:02,333 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-24 00:31:02,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2076797290] [2021-02-24 00:31:02,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:31:02,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-02-24 00:31:02,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057016497] [2021-02-24 00:31:02,334 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-24 00:31:02,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:31:02,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-24 00:31:02,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-24 00:31:02,336 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand 6 states. [2021-02-24 00:31:02,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:31:02,920 INFO L93 Difference]: Finished difference Result 104 states and 119 transitions. [2021-02-24 00:31:02,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-24 00:31:02,921 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2021-02-24 00:31:02,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:31:02,922 INFO L225 Difference]: With dead ends: 104 [2021-02-24 00:31:02,922 INFO L226 Difference]: Without dead ends: 82 [2021-02-24 00:31:02,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-02-24 00:31:02,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-02-24 00:31:02,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2021-02-24 00:31:02,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-02-24 00:31:02,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2021-02-24 00:31:02,957 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 60 [2021-02-24 00:31:02,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:31:02,958 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2021-02-24 00:31:02,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-24 00:31:02,958 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2021-02-24 00:31:02,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-02-24 00:31:02,959 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:31:02,959 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:31:02,959 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-24 00:31:02,960 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:31:02,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:31:02,960 INFO L82 PathProgramCache]: Analyzing trace with hash -429495557, now seen corresponding path program 1 times [2021-02-24 00:31:02,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:31:02,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [496989305] [2021-02-24 00:31:02,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:31:02,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:03,026 WARN L141 QuantifierPusher]: treesize reduction 1, result has 93.8 percent of original size [2021-02-24 00:31:03,027 WARN L147 QuantifierPusher]: treesize reduction 1, result has 93.8 percent of original size 15 [2021-02-24 00:31:03,054 WARN L141 QuantifierPusher]: treesize reduction 1, result has 94.7 percent of original size [2021-02-24 00:31:03,055 WARN L147 QuantifierPusher]: treesize reduction 1, result has 94.7 percent of original size 18 [2021-02-24 00:31:03,096 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:03,097 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-24 00:31:03,114 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:03,115 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-24 00:31:03,145 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:03,146 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 104 [2021-02-24 00:31:03,209 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:03,211 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 102 [2021-02-24 00:31:03,274 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:03,275 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 86 [2021-02-24 00:31:03,337 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:03,338 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:03,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:31:03,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:03,413 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:03,414 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:03,415 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:03,415 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:31:03,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-24 00:31:03,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:03,450 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:03,451 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:03,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-24 00:31:03,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:03,459 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:03,460 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:03,477 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-24 00:31:03,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [496989305] [2021-02-24 00:31:03,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:31:03,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-02-24 00:31:03,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069416709] [2021-02-24 00:31:03,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-24 00:31:03,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:31:03,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-24 00:31:03,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-02-24 00:31:03,480 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand 11 states. [2021-02-24 00:31:03,739 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-02-24 00:31:03,966 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-02-24 00:31:05,162 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-02-24 00:31:05,822 WARN L202 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 61 [2021-02-24 00:31:10,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:31:10,161 INFO L93 Difference]: Finished difference Result 113 states and 132 transitions. [2021-02-24 00:31:10,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-24 00:31:10,162 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2021-02-24 00:31:10,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:31:10,163 INFO L225 Difference]: With dead ends: 113 [2021-02-24 00:31:10,164 INFO L226 Difference]: Without dead ends: 91 [2021-02-24 00:31:10,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-02-24 00:31:10,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-02-24 00:31:10,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2021-02-24 00:31:10,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2021-02-24 00:31:10,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 99 transitions. [2021-02-24 00:31:10,200 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 99 transitions. Word has length 61 [2021-02-24 00:31:10,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:31:10,201 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 99 transitions. [2021-02-24 00:31:10,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-24 00:31:10,201 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 99 transitions. [2021-02-24 00:31:10,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-02-24 00:31:10,202 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:31:10,202 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:31:10,202 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-02-24 00:31:10,202 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:31:10,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:31:10,203 INFO L82 PathProgramCache]: Analyzing trace with hash 474210659, now seen corresponding path program 1 times [2021-02-24 00:31:10,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:31:10,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [221624361] [2021-02-24 00:31:10,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:31:10,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:10,274 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:10,275 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:10,276 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:10,276 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:31:10,282 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:10,283 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:31:10,295 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:10,296 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-24 00:31:10,313 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:10,314 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-24 00:31:10,335 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:10,336 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-24 00:31:10,364 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:10,365 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-24 00:31:10,401 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:10,403 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-24 00:31:10,445 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:10,446 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 00:31:10,495 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:10,496 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-02-24 00:31:10,552 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:10,554 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 00:31:10,607 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:10,608 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-02-24 00:31:10,656 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:10,657 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-02-24 00:31:10,706 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:10,707 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-24 00:31:10,760 WARN L141 QuantifierPusher]: treesize reduction 32, result has 83.5 percent of original size [2021-02-24 00:31:10,762 WARN L147 QuantifierPusher]: treesize reduction 32, result has 83.5 percent of original size 162 [2021-02-24 00:31:10,903 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 28 [2021-02-24 00:31:10,905 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:10,906 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:31:10,924 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:10,925 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:31:10,942 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:10,943 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:11,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:31:11,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:11,020 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:11,021 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:11,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-24 00:31:11,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:11,026 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:11,027 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:11,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-24 00:31:11,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:11,032 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:11,033 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:11,054 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-24 00:31:11,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [221624361] [2021-02-24 00:31:11,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:31:11,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-02-24 00:31:11,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769020652] [2021-02-24 00:31:11,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-24 00:31:11,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:31:11,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-24 00:31:11,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-02-24 00:31:11,057 INFO L87 Difference]: Start difference. First operand 88 states and 99 transitions. Second operand 19 states. [2021-02-24 00:31:13,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:31:13,711 INFO L93 Difference]: Finished difference Result 154 states and 190 transitions. [2021-02-24 00:31:13,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-24 00:31:13,711 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 62 [2021-02-24 00:31:13,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:31:13,713 INFO L225 Difference]: With dead ends: 154 [2021-02-24 00:31:13,713 INFO L226 Difference]: Without dead ends: 152 [2021-02-24 00:31:13,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=250, Invalid=1010, Unknown=0, NotChecked=0, Total=1260 [2021-02-24 00:31:13,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-02-24 00:31:13,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 116. [2021-02-24 00:31:13,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2021-02-24 00:31:13,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 139 transitions. [2021-02-24 00:31:13,782 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 139 transitions. Word has length 62 [2021-02-24 00:31:13,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:31:13,782 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 139 transitions. [2021-02-24 00:31:13,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-02-24 00:31:13,783 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 139 transitions. [2021-02-24 00:31:13,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-02-24 00:31:13,784 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:31:13,784 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:31:13,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-02-24 00:31:13,784 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:31:13,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:31:13,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1154101211, now seen corresponding path program 2 times [2021-02-24 00:31:13,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:31:13,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1881200290] [2021-02-24 00:31:13,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:31:13,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:13,846 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-24 00:31:13,847 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-24 00:31:13,877 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size [2021-02-24 00:31:13,878 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size 26 [2021-02-24 00:31:13,918 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:13,919 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-24 00:31:13,935 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:13,936 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-24 00:31:13,956 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:13,957 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-24 00:31:13,982 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size [2021-02-24 00:31:13,983 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size 101 [2021-02-24 00:31:14,091 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.1 percent of original size [2021-02-24 00:31:14,093 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.1 percent of original size 107 [2021-02-24 00:31:14,145 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size [2021-02-24 00:31:14,146 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size 103 [2021-02-24 00:31:14,189 WARN L141 QuantifierPusher]: treesize reduction 125, result has 0.8 percent of original size [2021-02-24 00:31:14,190 WARN L147 QuantifierPusher]: treesize reduction 125, result has 0.8 percent of original size 1 [2021-02-24 00:31:14,191 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:14,191 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:14,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:31:14,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:14,270 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:14,271 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:14,272 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:14,273 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:31:14,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-24 00:31:14,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:14,309 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:14,310 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:14,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-24 00:31:14,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:14,315 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:14,316 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:14,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-02-24 00:31:14,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:14,321 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:14,322 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:14,345 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-02-24 00:31:14,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1881200290] [2021-02-24 00:31:14,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:31:14,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-02-24 00:31:14,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542068232] [2021-02-24 00:31:14,347 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-24 00:31:14,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:31:14,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-24 00:31:14,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-02-24 00:31:14,348 INFO L87 Difference]: Start difference. First operand 116 states and 139 transitions. Second operand 10 states. [2021-02-24 00:31:14,629 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-02-24 00:31:14,826 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-02-24 00:31:15,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:31:15,738 INFO L93 Difference]: Finished difference Result 161 states and 197 transitions. [2021-02-24 00:31:15,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-24 00:31:15,738 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 71 [2021-02-24 00:31:15,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:31:15,740 INFO L225 Difference]: With dead ends: 161 [2021-02-24 00:31:15,740 INFO L226 Difference]: Without dead ends: 99 [2021-02-24 00:31:15,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-02-24 00:31:15,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-02-24 00:31:15,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 87. [2021-02-24 00:31:15,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-02-24 00:31:15,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 93 transitions. [2021-02-24 00:31:15,786 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 93 transitions. Word has length 71 [2021-02-24 00:31:15,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:31:15,786 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 93 transitions. [2021-02-24 00:31:15,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-24 00:31:15,786 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 93 transitions. [2021-02-24 00:31:15,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-02-24 00:31:15,787 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:31:15,787 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2021-02-24 00:31:15,788 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-02-24 00:31:15,788 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:31:15,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:31:15,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1200827759, now seen corresponding path program 1 times [2021-02-24 00:31:15,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:31:15,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [119344861] [2021-02-24 00:31:15,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:31:15,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:15,840 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:15,841 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:15,842 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:15,843 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:31:15,849 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:15,850 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-24 00:31:15,860 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:15,860 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-24 00:31:15,874 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:15,876 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 86 [2021-02-24 00:31:15,923 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:15,924 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:15,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:31:15,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:15,990 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:15,991 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:15,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-24 00:31:15,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:15,996 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:15,996 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:15,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-24 00:31:15,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:16,000 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:16,001 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:16,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-02-24 00:31:16,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:16,006 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:16,007 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:16,020 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-02-24 00:31:16,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [119344861] [2021-02-24 00:31:16,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:31:16,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-02-24 00:31:16,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452920468] [2021-02-24 00:31:16,022 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-24 00:31:16,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:31:16,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-24 00:31:16,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-24 00:31:16,023 INFO L87 Difference]: Start difference. First operand 87 states and 93 transitions. Second operand 7 states. [2021-02-24 00:31:18,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:31:18,993 INFO L93 Difference]: Finished difference Result 134 states and 160 transitions. [2021-02-24 00:31:18,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-24 00:31:18,995 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 72 [2021-02-24 00:31:18,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:31:18,996 INFO L225 Difference]: With dead ends: 134 [2021-02-24 00:31:18,996 INFO L226 Difference]: Without dead ends: 112 [2021-02-24 00:31:18,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-02-24 00:31:18,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-02-24 00:31:19,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2021-02-24 00:31:19,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2021-02-24 00:31:19,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 126 transitions. [2021-02-24 00:31:19,053 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 126 transitions. Word has length 72 [2021-02-24 00:31:19,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:31:19,053 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 126 transitions. [2021-02-24 00:31:19,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-24 00:31:19,053 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 126 transitions. [2021-02-24 00:31:19,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-02-24 00:31:19,054 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:31:19,054 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:31:19,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-02-24 00:31:19,054 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:31:19,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:31:19,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1817391455, now seen corresponding path program 1 times [2021-02-24 00:31:19,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:31:19,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071714635] [2021-02-24 00:31:19,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:31:19,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:19,114 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:19,115 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:19,116 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:19,116 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:31:19,122 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:19,123 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:31:19,149 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:19,150 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:31:19,176 WARN L141 QuantifierPusher]: treesize reduction 1, result has 98.9 percent of original size [2021-02-24 00:31:19,177 WARN L147 QuantifierPusher]: treesize reduction 1, result has 98.9 percent of original size 87 [2021-02-24 00:31:19,247 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size [2021-02-24 00:31:19,248 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size 95 [2021-02-24 00:31:19,283 WARN L141 QuantifierPusher]: treesize reduction 119, result has 0.8 percent of original size [2021-02-24 00:31:19,284 WARN L147 QuantifierPusher]: treesize reduction 119, result has 0.8 percent of original size 1 [2021-02-24 00:31:19,285 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:19,286 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:19,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:31:19,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:19,368 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:19,369 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:19,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-24 00:31:19,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:19,376 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:19,377 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:19,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-24 00:31:19,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:19,382 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:19,383 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:19,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-02-24 00:31:19,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:19,389 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:19,390 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:19,403 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 27 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-02-24 00:31:19,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071714635] [2021-02-24 00:31:19,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:31:19,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-02-24 00:31:19,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130113415] [2021-02-24 00:31:19,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-24 00:31:19,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:31:19,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-24 00:31:19,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-24 00:31:19,405 INFO L87 Difference]: Start difference. First operand 110 states and 126 transitions. Second operand 7 states. [2021-02-24 00:31:20,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:31:20,374 INFO L93 Difference]: Finished difference Result 163 states and 197 transitions. [2021-02-24 00:31:20,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-24 00:31:20,375 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 73 [2021-02-24 00:31:20,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:31:20,376 INFO L225 Difference]: With dead ends: 163 [2021-02-24 00:31:20,376 INFO L226 Difference]: Without dead ends: 118 [2021-02-24 00:31:20,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-02-24 00:31:20,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-02-24 00:31:20,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 112. [2021-02-24 00:31:20,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2021-02-24 00:31:20,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 128 transitions. [2021-02-24 00:31:20,431 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 128 transitions. Word has length 73 [2021-02-24 00:31:20,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:31:20,431 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 128 transitions. [2021-02-24 00:31:20,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-24 00:31:20,431 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 128 transitions. [2021-02-24 00:31:20,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-02-24 00:31:20,432 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:31:20,432 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:31:20,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-02-24 00:31:20,433 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:31:20,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:31:20,433 INFO L82 PathProgramCache]: Analyzing trace with hash -622716263, now seen corresponding path program 1 times [2021-02-24 00:31:20,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:31:20,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857054430] [2021-02-24 00:31:20,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:31:20,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:20,507 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:20,508 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:20,508 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:20,509 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:31:20,516 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:20,517 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:31:20,534 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:20,534 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-24 00:31:20,554 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:20,555 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-24 00:31:20,582 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:20,583 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-24 00:31:20,615 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:20,616 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-24 00:31:20,657 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:20,658 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-24 00:31:20,709 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:20,710 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 00:31:20,770 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:20,771 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-02-24 00:31:20,838 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:20,839 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 00:31:20,903 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:20,905 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-02-24 00:31:20,959 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:20,960 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-02-24 00:31:21,022 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:21,024 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-24 00:31:21,081 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:21,083 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 00:31:21,142 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:21,144 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-02-24 00:31:21,197 WARN L141 QuantifierPusher]: treesize reduction 32, result has 83.6 percent of original size [2021-02-24 00:31:21,199 WARN L147 QuantifierPusher]: treesize reduction 32, result has 83.6 percent of original size 163 [2021-02-24 00:31:21,353 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 27 [2021-02-24 00:31:21,355 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:21,355 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:31:21,382 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:21,383 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:31:21,413 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:21,414 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:21,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:31:21,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:21,506 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:21,507 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:21,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-24 00:31:21,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:21,512 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:21,513 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:21,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-24 00:31:21,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:21,519 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:21,519 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:21,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-02-24 00:31:21,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:21,524 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:21,525 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:21,552 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 37 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-02-24 00:31:21,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857054430] [2021-02-24 00:31:21,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:31:21,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-02-24 00:31:21,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106611136] [2021-02-24 00:31:21,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-24 00:31:21,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:31:21,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-24 00:31:21,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-02-24 00:31:21,555 INFO L87 Difference]: Start difference. First operand 112 states and 128 transitions. Second operand 21 states. [2021-02-24 00:31:22,606 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-02-24 00:31:22,835 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-02-24 00:31:22,984 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-02-24 00:31:25,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:31:25,241 INFO L93 Difference]: Finished difference Result 201 states and 249 transitions. [2021-02-24 00:31:25,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-24 00:31:25,243 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 75 [2021-02-24 00:31:25,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:31:25,245 INFO L225 Difference]: With dead ends: 201 [2021-02-24 00:31:25,245 INFO L226 Difference]: Without dead ends: 199 [2021-02-24 00:31:25,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=283, Invalid=1277, Unknown=0, NotChecked=0, Total=1560 [2021-02-24 00:31:25,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-02-24 00:31:25,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 144. [2021-02-24 00:31:25,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2021-02-24 00:31:25,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 171 transitions. [2021-02-24 00:31:25,319 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 171 transitions. Word has length 75 [2021-02-24 00:31:25,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:31:25,319 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 171 transitions. [2021-02-24 00:31:25,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-02-24 00:31:25,319 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 171 transitions. [2021-02-24 00:31:25,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-02-24 00:31:25,320 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:31:25,321 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 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] [2021-02-24 00:31:25,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-02-24 00:31:25,321 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:31:25,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:31:25,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1879413679, now seen corresponding path program 2 times [2021-02-24 00:31:25,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:31:25,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437056106] [2021-02-24 00:31:25,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:31:25,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:25,388 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-24 00:31:25,389 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-24 00:31:25,430 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size [2021-02-24 00:31:25,431 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size 26 [2021-02-24 00:31:25,478 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:25,479 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-24 00:31:25,499 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:25,500 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-24 00:31:25,525 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:25,526 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-24 00:31:25,554 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:25,555 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-24 00:31:25,591 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size [2021-02-24 00:31:25,593 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size 101 [2021-02-24 00:31:25,690 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.1 percent of original size [2021-02-24 00:31:25,691 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.1 percent of original size 107 [2021-02-24 00:31:25,746 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size [2021-02-24 00:31:25,747 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size 103 [2021-02-24 00:31:25,796 WARN L141 QuantifierPusher]: treesize reduction 125, result has 0.8 percent of original size [2021-02-24 00:31:25,796 WARN L147 QuantifierPusher]: treesize reduction 125, result has 0.8 percent of original size 1 [2021-02-24 00:31:25,797 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:25,798 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:25,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:31:25,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:25,890 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:25,891 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:25,891 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:25,892 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:31:25,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-24 00:31:25,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:25,947 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:25,948 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:25,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-24 00:31:25,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:25,952 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:25,953 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:25,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-02-24 00:31:25,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:25,957 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:25,958 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:25,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-02-24 00:31:25,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:25,963 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:25,964 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:25,990 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 17 proven. 45 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-02-24 00:31:25,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437056106] [2021-02-24 00:31:25,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:31:25,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-02-24 00:31:25,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493692213] [2021-02-24 00:31:25,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-24 00:31:25,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:31:25,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-24 00:31:25,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-02-24 00:31:25,992 INFO L87 Difference]: Start difference. First operand 144 states and 171 transitions. Second operand 11 states. [2021-02-24 00:31:26,334 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-02-24 00:31:26,581 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-02-24 00:31:27,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:31:27,977 INFO L93 Difference]: Finished difference Result 212 states and 261 transitions. [2021-02-24 00:31:27,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-24 00:31:27,979 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 84 [2021-02-24 00:31:27,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:31:27,981 INFO L225 Difference]: With dead ends: 212 [2021-02-24 00:31:27,981 INFO L226 Difference]: Without dead ends: 135 [2021-02-24 00:31:27,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-02-24 00:31:27,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-02-24 00:31:28,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 123. [2021-02-24 00:31:28,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2021-02-24 00:31:28,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 139 transitions. [2021-02-24 00:31:28,042 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 139 transitions. Word has length 84 [2021-02-24 00:31:28,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:31:28,043 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 139 transitions. [2021-02-24 00:31:28,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-24 00:31:28,043 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 139 transitions. [2021-02-24 00:31:28,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-02-24 00:31:28,044 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:31:28,044 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:31:28,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-02-24 00:31:28,044 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:31:28,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:31:28,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1651146681, now seen corresponding path program 1 times [2021-02-24 00:31:28,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:31:28,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783758926] [2021-02-24 00:31:28,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:31:28,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:28,116 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:28,117 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:28,118 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:28,119 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:31:28,126 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:28,127 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-24 00:31:28,140 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:28,141 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-24 00:31:28,162 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:28,162 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-24 00:31:28,204 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:28,205 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 90 [2021-02-24 00:31:28,315 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:28,316 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 86 [2021-02-24 00:31:28,479 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:28,480 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:28,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:31:28,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:28,566 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:28,567 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:28,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-24 00:31:28,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:28,573 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:28,574 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:28,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-24 00:31:28,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:28,578 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:28,579 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:28,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-02-24 00:31:28,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:28,582 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:28,583 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:28,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-02-24 00:31:28,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:28,589 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:28,590 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:28,618 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 16 proven. 48 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-02-24 00:31:28,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [783758926] [2021-02-24 00:31:28,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:31:28,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-02-24 00:31:28,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753283646] [2021-02-24 00:31:28,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-24 00:31:28,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:31:28,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-24 00:31:28,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-02-24 00:31:28,621 INFO L87 Difference]: Start difference. First operand 123 states and 139 transitions. Second operand 9 states. [2021-02-24 00:31:37,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:31:37,323 INFO L93 Difference]: Finished difference Result 180 states and 216 transitions. [2021-02-24 00:31:37,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-24 00:31:37,325 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 85 [2021-02-24 00:31:37,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:31:37,327 INFO L225 Difference]: With dead ends: 180 [2021-02-24 00:31:37,327 INFO L226 Difference]: Without dead ends: 135 [2021-02-24 00:31:37,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-02-24 00:31:37,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-02-24 00:31:37,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 124. [2021-02-24 00:31:37,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2021-02-24 00:31:37,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 140 transitions. [2021-02-24 00:31:37,387 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 140 transitions. Word has length 85 [2021-02-24 00:31:37,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:31:37,387 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 140 transitions. [2021-02-24 00:31:37,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-24 00:31:37,387 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 140 transitions. [2021-02-24 00:31:37,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-02-24 00:31:37,388 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:31:37,388 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:31:37,388 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-02-24 00:31:37,389 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:31:37,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:31:37,389 INFO L82 PathProgramCache]: Analyzing trace with hash 742406761, now seen corresponding path program 1 times [2021-02-24 00:31:37,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:31:37,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497693639] [2021-02-24 00:31:37,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:31:37,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:37,472 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-24 00:31:37,473 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-24 00:31:37,529 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size [2021-02-24 00:31:37,531 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size 26 [2021-02-24 00:31:37,587 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:37,588 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-24 00:31:37,616 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:37,617 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-02-24 00:31:37,662 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:37,663 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-02-24 00:31:37,714 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:37,715 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-02-24 00:31:37,773 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.1 percent of original size [2021-02-24 00:31:37,774 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.1 percent of original size 109 [2021-02-24 00:31:37,937 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-02-24 00:31:37,941 WARN L141 QuantifierPusher]: treesize reduction 8, result has 93.5 percent of original size [2021-02-24 00:31:37,943 WARN L147 QuantifierPusher]: treesize reduction 8, result has 93.5 percent of original size 115 [2021-02-24 00:31:38,042 WARN L141 QuantifierPusher]: treesize reduction 8, result has 92.5 percent of original size [2021-02-24 00:31:38,044 WARN L147 QuantifierPusher]: treesize reduction 8, result has 92.5 percent of original size 99 [2021-02-24 00:31:38,169 WARN L141 QuantifierPusher]: treesize reduction 89, result has 49.1 percent of original size [2021-02-24 00:31:38,170 WARN L147 QuantifierPusher]: treesize reduction 89, result has 49.1 percent of original size 86 [2021-02-24 00:31:38,174 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:38,174 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:38,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:31:38,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:38,276 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:38,277 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:38,278 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:38,279 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:31:38,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-24 00:31:38,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:38,341 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:38,342 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:38,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-24 00:31:38,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:38,348 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:38,348 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:38,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-02-24 00:31:38,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:38,357 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:38,358 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:38,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-02-24 00:31:38,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:38,365 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:38,366 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:38,405 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 16 proven. 51 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-02-24 00:31:38,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497693639] [2021-02-24 00:31:38,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:31:38,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-02-24 00:31:38,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660325698] [2021-02-24 00:31:38,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-24 00:31:38,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:31:38,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-24 00:31:38,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-02-24 00:31:38,408 INFO L87 Difference]: Start difference. First operand 124 states and 140 transitions. Second operand 12 states. [2021-02-24 00:31:38,778 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-02-24 00:31:39,067 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-02-24 00:31:40,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:31:40,511 INFO L93 Difference]: Finished difference Result 173 states and 207 transitions. [2021-02-24 00:31:40,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-24 00:31:40,512 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 86 [2021-02-24 00:31:40,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:31:40,513 INFO L225 Difference]: With dead ends: 173 [2021-02-24 00:31:40,513 INFO L226 Difference]: Without dead ends: 128 [2021-02-24 00:31:40,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-02-24 00:31:40,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-02-24 00:31:40,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2021-02-24 00:31:40,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2021-02-24 00:31:40,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 142 transitions. [2021-02-24 00:31:40,573 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 142 transitions. Word has length 86 [2021-02-24 00:31:40,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:31:40,573 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 142 transitions. [2021-02-24 00:31:40,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-24 00:31:40,573 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 142 transitions. [2021-02-24 00:31:40,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-02-24 00:31:40,574 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:31:40,574 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:31:40,575 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-02-24 00:31:40,575 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:31:40,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:31:40,576 INFO L82 PathProgramCache]: Analyzing trace with hash 2099894337, now seen corresponding path program 1 times [2021-02-24 00:31:40,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:31:40,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1877620034] [2021-02-24 00:31:40,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:31:40,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:40,670 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:40,671 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:40,672 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:40,672 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:31:40,680 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:40,680 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:31:40,696 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:40,697 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-24 00:31:40,718 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:40,719 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-24 00:31:40,744 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:40,746 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-24 00:31:40,781 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:40,782 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-24 00:31:40,824 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:40,826 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-24 00:31:40,873 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:40,874 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 00:31:40,934 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:40,935 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-02-24 00:31:40,998 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:40,999 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 00:31:41,056 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:41,057 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-02-24 00:31:41,116 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:41,118 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-02-24 00:31:41,177 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:41,178 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-24 00:31:41,235 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:41,236 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 00:31:41,301 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:41,302 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-02-24 00:31:41,353 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:41,354 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-02-24 00:31:41,405 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:41,406 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-24 00:31:41,462 WARN L141 QuantifierPusher]: treesize reduction 32, result has 83.7 percent of original size [2021-02-24 00:31:41,465 WARN L147 QuantifierPusher]: treesize reduction 32, result has 83.7 percent of original size 164 [2021-02-24 00:31:41,616 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 26 [2021-02-24 00:31:41,618 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:41,618 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:31:41,650 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:41,651 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:31:41,691 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:41,691 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:41,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:31:41,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:41,788 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:41,789 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:41,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-24 00:31:41,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:41,804 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:41,805 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:41,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-24 00:31:41,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:41,810 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:41,811 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:41,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-02-24 00:31:41,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:41,815 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:41,816 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:41,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-02-24 00:31:41,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:41,821 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:41,822 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:41,858 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-02-24 00:31:41,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1877620034] [2021-02-24 00:31:41,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:31:41,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-02-24 00:31:41,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102268204] [2021-02-24 00:31:41,859 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-24 00:31:41,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:31:41,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-24 00:31:41,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-02-24 00:31:41,860 INFO L87 Difference]: Start difference. First operand 126 states and 142 transitions. Second operand 23 states. [2021-02-24 00:31:42,987 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-02-24 00:31:43,228 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-02-24 00:31:43,377 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-02-24 00:31:43,858 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-02-24 00:31:43,991 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-02-24 00:31:45,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:31:45,505 INFO L93 Difference]: Finished difference Result 146 states and 165 transitions. [2021-02-24 00:31:45,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-24 00:31:45,509 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 87 [2021-02-24 00:31:45,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:31:45,510 INFO L225 Difference]: With dead ends: 146 [2021-02-24 00:31:45,510 INFO L226 Difference]: Without dead ends: 144 [2021-02-24 00:31:45,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=322, Invalid=1570, Unknown=0, NotChecked=0, Total=1892 [2021-02-24 00:31:45,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-02-24 00:31:45,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 133. [2021-02-24 00:31:45,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2021-02-24 00:31:45,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 149 transitions. [2021-02-24 00:31:45,577 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 149 transitions. Word has length 87 [2021-02-24 00:31:45,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:31:45,578 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 149 transitions. [2021-02-24 00:31:45,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-02-24 00:31:45,578 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 149 transitions. [2021-02-24 00:31:45,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-02-24 00:31:45,579 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:31:45,580 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:31:45,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-02-24 00:31:45,580 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:31:45,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:31:45,581 INFO L82 PathProgramCache]: Analyzing trace with hash -162221305, now seen corresponding path program 2 times [2021-02-24 00:31:45,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:31:45,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31422112] [2021-02-24 00:31:45,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:31:45,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:45,661 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-24 00:31:45,662 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-24 00:31:45,704 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size [2021-02-24 00:31:45,705 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size 26 [2021-02-24 00:31:45,762 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:45,763 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-24 00:31:45,787 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:45,788 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-24 00:31:45,817 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:45,817 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-24 00:31:45,851 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:45,853 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-24 00:31:45,891 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:45,892 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-24 00:31:45,934 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size [2021-02-24 00:31:45,935 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size 101 [2021-02-24 00:31:46,107 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.1 percent of original size [2021-02-24 00:31:46,108 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.1 percent of original size 107 [2021-02-24 00:31:46,166 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size [2021-02-24 00:31:46,168 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size 103 [2021-02-24 00:31:46,223 WARN L141 QuantifierPusher]: treesize reduction 125, result has 0.8 percent of original size [2021-02-24 00:31:46,224 WARN L147 QuantifierPusher]: treesize reduction 125, result has 0.8 percent of original size 1 [2021-02-24 00:31:46,225 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:46,226 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:46,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:31:46,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:46,324 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:46,324 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:46,325 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:46,326 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:31:46,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-24 00:31:46,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:46,378 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:46,379 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:46,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-24 00:31:46,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:46,384 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:46,384 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:46,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-02-24 00:31:46,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:46,389 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:46,390 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:46,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-02-24 00:31:46,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:46,395 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:46,396 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:46,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-02-24 00:31:46,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:46,401 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:46,402 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:46,437 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 21 proven. 72 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-02-24 00:31:46,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31422112] [2021-02-24 00:31:46,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:31:46,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-02-24 00:31:46,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547021254] [2021-02-24 00:31:46,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-24 00:31:46,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:31:46,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-24 00:31:46,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-02-24 00:31:46,439 INFO L87 Difference]: Start difference. First operand 133 states and 149 transitions. Second operand 12 states. [2021-02-24 00:31:46,813 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-02-24 00:31:47,097 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-02-24 00:31:48,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:31:48,898 INFO L93 Difference]: Finished difference Result 189 states and 224 transitions. [2021-02-24 00:31:48,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-24 00:31:48,899 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 96 [2021-02-24 00:31:48,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:31:48,901 INFO L225 Difference]: With dead ends: 189 [2021-02-24 00:31:48,901 INFO L226 Difference]: Without dead ends: 144 [2021-02-24 00:31:48,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-02-24 00:31:48,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-02-24 00:31:48,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 135. [2021-02-24 00:31:48,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2021-02-24 00:31:48,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 151 transitions. [2021-02-24 00:31:48,990 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 151 transitions. Word has length 96 [2021-02-24 00:31:48,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:31:48,990 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 151 transitions. [2021-02-24 00:31:48,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-24 00:31:48,991 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 151 transitions. [2021-02-24 00:31:48,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-02-24 00:31:48,992 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:31:48,992 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:31:48,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-02-24 00:31:48,992 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:31:48,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:31:48,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1531241409, now seen corresponding path program 1 times [2021-02-24 00:31:48,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:31:48,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162123244] [2021-02-24 00:31:48,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:31:49,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:49,144 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:49,145 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:49,146 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:49,147 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:31:49,154 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:49,155 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:31:49,168 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:49,169 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-24 00:31:49,191 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:49,192 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-24 00:31:49,224 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:49,225 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-24 00:31:49,263 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:49,264 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-24 00:31:49,313 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:49,314 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-24 00:31:49,379 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:49,381 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 00:31:49,448 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:49,450 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-02-24 00:31:49,518 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:49,519 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 00:31:49,583 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:49,584 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-02-24 00:31:49,642 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:49,643 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-02-24 00:31:49,705 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:49,706 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-24 00:31:49,768 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:49,769 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 00:31:49,834 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:49,836 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-02-24 00:31:49,887 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:49,888 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-02-24 00:31:49,943 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:49,944 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-24 00:31:49,999 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:50,000 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-02-24 00:31:50,056 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:50,057 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-02-24 00:31:50,113 WARN L141 QuantifierPusher]: treesize reduction 32, result has 83.8 percent of original size [2021-02-24 00:31:50,117 WARN L147 QuantifierPusher]: treesize reduction 32, result has 83.8 percent of original size 165 [2021-02-24 00:31:50,273 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 26 [2021-02-24 00:31:50,274 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:50,276 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:31:50,311 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:50,311 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:31:50,348 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:50,349 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:50,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:31:50,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:50,453 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:50,453 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:50,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-24 00:31:50,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:50,463 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:50,464 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:50,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-24 00:31:50,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:50,471 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:50,472 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:50,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-02-24 00:31:50,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:50,478 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:50,479 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:50,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-02-24 00:31:50,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:50,486 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:50,487 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:50,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-02-24 00:31:50,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:50,496 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:50,497 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:50,554 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-02-24 00:31:50,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162123244] [2021-02-24 00:31:50,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:31:50,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-02-24 00:31:50,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865517282] [2021-02-24 00:31:50,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-24 00:31:50,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:31:50,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-24 00:31:50,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-02-24 00:31:50,558 INFO L87 Difference]: Start difference. First operand 135 states and 151 transitions. Second operand 25 states. [2021-02-24 00:31:51,638 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-02-24 00:31:51,849 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-02-24 00:31:52,005 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-02-24 00:31:52,460 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-02-24 00:31:52,597 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-02-24 00:31:54,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:31:54,603 INFO L93 Difference]: Finished difference Result 219 states and 268 transitions. [2021-02-24 00:31:54,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-24 00:31:54,604 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 98 [2021-02-24 00:31:54,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:31:54,606 INFO L225 Difference]: With dead ends: 219 [2021-02-24 00:31:54,606 INFO L226 Difference]: Without dead ends: 217 [2021-02-24 00:31:54,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=367, Invalid=1889, Unknown=0, NotChecked=0, Total=2256 [2021-02-24 00:31:54,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-02-24 00:31:54,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 183. [2021-02-24 00:31:54,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2021-02-24 00:31:54,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 218 transitions. [2021-02-24 00:31:54,709 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 218 transitions. Word has length 98 [2021-02-24 00:31:54,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:31:54,709 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 218 transitions. [2021-02-24 00:31:54,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-02-24 00:31:54,710 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 218 transitions. [2021-02-24 00:31:54,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-02-24 00:31:54,710 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:31:54,711 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 5, 5, 4, 3, 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] [2021-02-24 00:31:54,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-02-24 00:31:54,711 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:31:54,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:31:54,711 INFO L82 PathProgramCache]: Analyzing trace with hash 321820551, now seen corresponding path program 2 times [2021-02-24 00:31:54,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:31:54,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182186832] [2021-02-24 00:31:54,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:31:54,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:54,795 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-24 00:31:54,795 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-24 00:31:54,840 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size [2021-02-24 00:31:54,841 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size 26 [2021-02-24 00:31:54,892 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:54,893 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-24 00:31:54,914 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:54,915 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-24 00:31:54,945 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:54,946 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-24 00:31:54,978 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:54,979 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-24 00:31:55,014 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:55,015 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-24 00:31:55,052 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:55,052 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-24 00:31:55,098 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size [2021-02-24 00:31:55,101 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size 101 [2021-02-24 00:31:55,195 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.1 percent of original size [2021-02-24 00:31:55,198 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.1 percent of original size 107 [2021-02-24 00:31:55,249 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size [2021-02-24 00:31:55,250 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.0 percent of original size 103 [2021-02-24 00:31:55,302 WARN L141 QuantifierPusher]: treesize reduction 125, result has 0.8 percent of original size [2021-02-24 00:31:55,303 WARN L147 QuantifierPusher]: treesize reduction 125, result has 0.8 percent of original size 1 [2021-02-24 00:31:55,304 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:55,305 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:55,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:31:55,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:55,433 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:55,434 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:55,435 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:55,436 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:31:55,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-24 00:31:55,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:55,501 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:55,502 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:55,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-24 00:31:55,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:55,507 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:55,509 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:55,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-02-24 00:31:55,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:55,514 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:55,515 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:55,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-02-24 00:31:55,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:55,521 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:55,522 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:55,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-02-24 00:31:55,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:55,528 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:55,529 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:55,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-02-24 00:31:55,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:55,534 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:55,535 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:55,590 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 25 proven. 102 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-02-24 00:31:55,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182186832] [2021-02-24 00:31:55,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:31:55,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-02-24 00:31:55,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491867604] [2021-02-24 00:31:55,591 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-24 00:31:55,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:31:55,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-24 00:31:55,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-02-24 00:31:55,592 INFO L87 Difference]: Start difference. First operand 183 states and 218 transitions. Second operand 13 states. [2021-02-24 00:31:55,991 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-02-24 00:31:56,286 WARN L202 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-02-24 00:31:58,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:31:58,333 INFO L93 Difference]: Finished difference Result 242 states and 296 transitions. [2021-02-24 00:31:58,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-24 00:31:58,337 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 107 [2021-02-24 00:31:58,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:31:58,339 INFO L225 Difference]: With dead ends: 242 [2021-02-24 00:31:58,340 INFO L226 Difference]: Without dead ends: 149 [2021-02-24 00:31:58,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-02-24 00:31:58,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-02-24 00:31:58,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 147. [2021-02-24 00:31:58,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2021-02-24 00:31:58,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 163 transitions. [2021-02-24 00:31:58,407 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 163 transitions. Word has length 107 [2021-02-24 00:31:58,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:31:58,407 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 163 transitions. [2021-02-24 00:31:58,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-02-24 00:31:58,407 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 163 transitions. [2021-02-24 00:31:58,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-02-24 00:31:58,408 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:31:58,409 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:31:58,409 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-02-24 00:31:58,409 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:31:58,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:31:58,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1603073903, now seen corresponding path program 1 times [2021-02-24 00:31:58,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:31:58,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1127067940] [2021-02-24 00:31:58,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:31:58,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:58,611 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:58,612 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:58,612 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:58,613 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:31:58,620 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:58,621 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:31:58,638 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:58,639 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-24 00:31:58,661 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:58,662 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-24 00:31:58,689 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:58,690 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-24 00:31:58,723 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:58,723 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-24 00:31:58,767 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:58,768 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-24 00:31:58,817 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:58,818 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 00:31:58,873 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:58,874 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-02-24 00:31:58,943 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:58,944 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 00:31:59,004 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:59,005 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-02-24 00:31:59,064 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:59,065 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-02-24 00:31:59,124 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:59,125 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-24 00:31:59,186 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:59,188 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 00:31:59,248 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:59,250 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-02-24 00:31:59,300 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:59,301 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-02-24 00:31:59,353 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:59,354 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-24 00:31:59,406 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:59,408 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-02-24 00:31:59,463 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:59,464 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-02-24 00:31:59,519 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:59,520 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-24 00:31:59,576 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:59,577 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 00:31:59,637 WARN L141 QuantifierPusher]: treesize reduction 32, result has 83.8 percent of original size [2021-02-24 00:31:59,638 WARN L147 QuantifierPusher]: treesize reduction 32, result has 83.8 percent of original size 166 [2021-02-24 00:31:59,791 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:59,792 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:31:59,825 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:59,827 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:31:59,869 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:59,870 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:59,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:31:59,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:59,973 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:59,975 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:59,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-24 00:31:59,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:59,979 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:59,980 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:59,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-24 00:31:59,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:59,985 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:59,986 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:59,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-02-24 00:31:59,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:59,990 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:59,990 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:59,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-02-24 00:31:59,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:59,996 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:59,996 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:59,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-02-24 00:31:59,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:32:00,000 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:32:00,001 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:32:00,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-02-24 00:32:00,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:32:00,006 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:32:00,007 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:32:00,054 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 12 proven. 119 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-02-24 00:32:00,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1127067940] [2021-02-24 00:32:00,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:32:00,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-02-24 00:32:00,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210349059] [2021-02-24 00:32:00,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-24 00:32:00,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:32:00,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-24 00:32:00,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2021-02-24 00:32:00,056 INFO L87 Difference]: Start difference. First operand 147 states and 163 transitions. Second operand 27 states. [2021-02-24 00:32:01,134 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-02-24 00:32:01,294 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-02-24 00:32:01,565 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-02-24 00:32:01,729 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-02-24 00:32:02,296 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-02-24 00:32:02,432 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-02-24 00:32:04,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:32:04,756 INFO L93 Difference]: Finished difference Result 167 states and 186 transitions. [2021-02-24 00:32:04,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-24 00:32:04,757 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 108 [2021-02-24 00:32:04,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:32:04,759 INFO L225 Difference]: With dead ends: 167 [2021-02-24 00:32:04,759 INFO L226 Difference]: Without dead ends: 165 [2021-02-24 00:32:04,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=418, Invalid=2234, Unknown=0, NotChecked=0, Total=2652 [2021-02-24 00:32:04,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-02-24 00:32:04,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 154. [2021-02-24 00:32:04,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2021-02-24 00:32:04,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 170 transitions. [2021-02-24 00:32:04,837 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 170 transitions. Word has length 108 [2021-02-24 00:32:04,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:32:04,837 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 170 transitions. [2021-02-24 00:32:04,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-02-24 00:32:04,838 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 170 transitions. [2021-02-24 00:32:04,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-02-24 00:32:04,839 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:32:04,839 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 6, 5, 4, 3, 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] [2021-02-24 00:32:04,839 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-02-24 00:32:04,839 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:32:04,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:32:04,840 INFO L82 PathProgramCache]: Analyzing trace with hash -583612519, now seen corresponding path program 2 times [2021-02-24 00:32:04,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:32:04,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046484815] [2021-02-24 00:32:04,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:32:04,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:32:04,972 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:32:04,973 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:32:04,973 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:32:04,974 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:32:04,980 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:32:04,980 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:32:04,997 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:32:04,998 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-24 00:32:05,019 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:32:05,020 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-24 00:32:05,048 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:32:05,049 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-24 00:32:05,083 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:32:05,084 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-24 00:32:05,123 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:32:05,124 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-24 00:32:05,173 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:32:05,174 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 00:32:05,232 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:32:05,233 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-02-24 00:32:05,299 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:32:05,300 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 00:32:05,368 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:32:05,370 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-02-24 00:32:05,424 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:32:05,425 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-02-24 00:32:05,485 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:32:05,486 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-24 00:32:05,544 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:32:05,545 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 00:32:05,608 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:32:05,609 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-02-24 00:32:05,667 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:32:05,669 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-02-24 00:32:05,721 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:32:05,722 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-24 00:32:05,776 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:32:05,776 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-02-24 00:32:05,831 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:32:05,832 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-02-24 00:32:05,886 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:32:05,887 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-24 00:32:05,945 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:32:05,946 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 00:32:06,001 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:32:06,002 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-24 00:32:06,060 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:32:06,063 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 00:32:06,066 WARN L141 QuantifierPusher]: treesize reduction 32, result has 83.8 percent of original size [2021-02-24 00:32:06,067 WARN L147 QuantifierPusher]: treesize reduction 32, result has 83.8 percent of original size 166 [2021-02-24 00:32:06,222 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:32:06,223 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:32:06,262 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:32:06,263 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:32:06,305 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:32:06,310 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:32:06,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:32:06,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:32:06,411 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:32:06,411 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:32:06,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-24 00:32:06,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:32:06,418 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:32:06,425 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:32:06,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-24 00:32:06,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:32:06,431 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:32:06,432 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:32:06,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-02-24 00:32:06,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:32:06,438 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:32:06,438 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:32:06,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-02-24 00:32:06,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:32:06,444 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:32:06,445 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:32:06,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-02-24 00:32:06,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:32:06,450 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:32:06,451 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:32:06,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-02-24 00:32:06,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:32:06,455 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:32:06,456 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:32:06,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-02-24 00:32:06,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:32:06,461 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:32:06,462 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:32:06,504 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 14 proven. 147 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-02-24 00:32:06,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046484815] [2021-02-24 00:32:06,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:32:06,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-02-24 00:32:06,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125010162] [2021-02-24 00:32:06,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-24 00:32:06,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:32:06,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-24 00:32:06,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=607, Unknown=0, NotChecked=0, Total=756 [2021-02-24 00:32:06,506 INFO L87 Difference]: Start difference. First operand 154 states and 170 transitions. Second operand 28 states. [2021-02-24 00:32:07,722 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-02-24 00:32:07,970 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-02-24 00:32:08,127 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-02-24 00:32:08,656 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-02-24 00:32:08,799 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-02-24 00:32:10,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:32:10,710 INFO L93 Difference]: Finished difference Result 154 states and 170 transitions. [2021-02-24 00:32:10,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-24 00:32:10,712 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 117 [2021-02-24 00:32:10,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:32:10,715 INFO L225 Difference]: With dead ends: 154 [2021-02-24 00:32:10,716 INFO L226 Difference]: Without dead ends: 0 [2021-02-24 00:32:10,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=431, Invalid=2221, Unknown=0, NotChecked=0, Total=2652 [2021-02-24 00:32:10,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-24 00:32:10,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-24 00:32:10,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-24 00:32:10,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-24 00:32:10,718 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 117 [2021-02-24 00:32:10,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:32:10,718 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-24 00:32:10,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-02-24 00:32:10,718 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-24 00:32:10,718 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-24 00:32:10,718 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-02-24 00:32:10,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-24 00:32:11,009 WARN L202 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 281 [2021-02-24 00:32:11,431 WARN L202 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 249 [2021-02-24 00:32:11,917 WARN L202 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 301 [2021-02-24 00:32:12,491 WARN L202 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 379 DAG size of output: 242 [2021-02-24 00:32:12,927 WARN L202 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 285 [2021-02-24 00:32:13,208 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 127 [2021-02-24 00:32:13,350 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 293 [2021-02-24 00:32:13,571 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 196 [2021-02-24 00:32:13,693 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 288 [2021-02-24 00:32:13,994 WARN L202 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 306 [2021-02-24 00:32:14,397 WARN L202 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 286 [2021-02-24 00:32:14,691 WARN L202 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 156 [2021-02-24 00:32:14,991 WARN L202 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 162 [2021-02-24 00:32:15,272 WARN L202 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 19 [2021-02-24 00:32:18,214 WARN L202 SmtUtils]: Spent 2.94 s on a formula simplification. DAG size of input: 239 DAG size of output: 45 [2021-02-24 00:32:18,389 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 23 [2021-02-24 00:32:18,559 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 21 [2021-02-24 00:32:18,820 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 19 [2021-02-24 00:32:18,966 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 17 [2021-02-24 00:32:19,983 WARN L202 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 290 DAG size of output: 36 [2021-02-24 00:32:20,341 WARN L202 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 21 [2021-02-24 00:32:21,852 WARN L202 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 274 DAG size of output: 37 [2021-02-24 00:32:22,068 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 26 [2021-02-24 00:32:22,277 WARN L202 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 25 [2021-02-24 00:32:22,473 WARN L202 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 25 [2021-02-24 00:32:22,680 WARN L202 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 25 [2021-02-24 00:32:23,074 WARN L202 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 44 [2021-02-24 00:32:23,407 WARN L202 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 19 [2021-02-24 00:32:24,248 WARN L202 SmtUtils]: Spent 739.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 45 [2021-02-24 00:32:24,573 WARN L202 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 19 [2021-02-24 00:32:25,554 WARN L202 SmtUtils]: Spent 978.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 37 [2021-02-24 00:32:25,925 WARN L202 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 19 [2021-02-24 00:32:26,078 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 25 [2021-02-24 00:32:26,280 WARN L202 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 25 [2021-02-24 00:32:27,064 WARN L202 SmtUtils]: Spent 778.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 36 [2021-02-24 00:32:27,208 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 19 [2021-02-24 00:32:27,316 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 15 [2021-02-24 00:32:27,769 WARN L202 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 37 [2021-02-24 00:32:28,304 WARN L202 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 41 [2021-02-24 00:32:28,309 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-24 00:32:28,309 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-24 00:32:28,309 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-24 00:32:28,309 INFO L192 CegarLoopUtils]: At program point L3-2(line 3) the Hoare annotation is: true [2021-02-24 00:32:28,310 INFO L192 CegarLoopUtils]: At program point L3-3(line 3) the Hoare annotation is: true [2021-02-24 00:32:28,310 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-24 00:32:28,310 INFO L192 CegarLoopUtils]: At program point L3-4(line 3) the Hoare annotation is: true [2021-02-24 00:32:28,310 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-24 00:32:28,310 INFO L192 CegarLoopUtils]: At program point L3-5(line 3) the Hoare annotation is: true [2021-02-24 00:32:28,310 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: (and (<= 20000001 ~SIZE~0) (<= ~SIZE~0 20000001)) [2021-02-24 00:32:28,311 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= ~SIZE~0 |old(~SIZE~0)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-02-24 00:32:28,311 INFO L192 CegarLoopUtils]: At program point L3(line 3) the Hoare annotation is: true [2021-02-24 00:32:28,311 INFO L192 CegarLoopUtils]: At program point L3-1(line 3) the Hoare annotation is: true [2021-02-24 00:32:28,312 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: (and (<= 20000001 ~SIZE~0) (<= ~SIZE~0 20000001)) [2021-02-24 00:32:28,312 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-02-24 00:32:28,313 INFO L185 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: (and (<= 20000001 ~SIZE~0) (<= ~SIZE~0 20000001)) [2021-02-24 00:32:28,313 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-24 00:32:28,313 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-02-24 00:32:28,314 INFO L189 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 5 7) no Hoare annotation was computed. [2021-02-24 00:32:28,314 INFO L189 CegarLoopUtils]: For program point L6(line 6) no Hoare annotation was computed. [2021-02-24 00:32:28,314 INFO L189 CegarLoopUtils]: For program point L6-1(line 6) no Hoare annotation was computed. [2021-02-24 00:32:28,314 INFO L189 CegarLoopUtils]: For program point L6-3(lines 5 7) no Hoare annotation was computed. [2021-02-24 00:32:28,314 INFO L189 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 5 7) no Hoare annotation was computed. [2021-02-24 00:32:28,314 INFO L185 CegarLoopUtils]: At program point L31(lines 31 36) the Hoare annotation is: (or (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0)) (let ((.cse3 (+ main_~i~0 main_~j~0 main_~v1~0 main_~k~0 main_~v2~0 main_~v3~0 main_~v4~0))) (and (<= (let ((.cse2 (div main_~l~0 4294967296))) (let ((.cse1 (* .cse2 (- 4294967296)))) (let ((.cse0 (div (+ main_~l~0 .cse1) 6))) (+ (* 4294967296 (div (+ main_~l~0 (* .cse0 (- 6)) .cse1) 4294967296)) (* 6 .cse0) (* 4294967296 .cse2) 1)))) main_~l~0) (<= .cse3 main_~l~0) (<= main_~l~0 .cse3)))) [2021-02-24 00:32:28,314 INFO L185 CegarLoopUtils]: At program point L27(lines 27 36) the Hoare annotation is: (or (let ((.cse3 (+ main_~i~0 main_~j~0 main_~v1~0 main_~k~0 main_~v2~0 main_~v3~0 main_~v4~0))) (and (<= (let ((.cse2 (div main_~l~0 4294967296))) (let ((.cse1 (* .cse2 (- 4294967296)))) (let ((.cse0 (div (+ main_~l~0 .cse1) 6))) (+ (* 4294967298 (div (+ main_~l~0 (* .cse0 (- 6)) .cse1) 4294967296)) (* 6 .cse0) (* 4294967296 .cse2) 1)))) main_~l~0) (<= .cse3 main_~l~0) (<= main_~l~0 .cse3))) (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0))) [2021-02-24 00:32:28,314 INFO L192 CegarLoopUtils]: At program point mainEXIT(lines 16 41) the Hoare annotation is: true [2021-02-24 00:32:28,314 INFO L185 CegarLoopUtils]: At program point L23(lines 23 36) the Hoare annotation is: (or (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0)) (let ((.cse0 (+ main_~i~0 main_~j~0 main_~v1~0 main_~k~0 main_~v2~0 main_~v3~0 main_~v4~0))) (and (<= .cse0 main_~l~0) (<= main_~l~0 .cse0)))) [2021-02-24 00:32:28,315 INFO L185 CegarLoopUtils]: At program point L19(line 19) the Hoare annotation is: (or (and (= main_~v3~0 0) (= main_~k~0 0) (= main_~i~0 0) (= main_~j~0 0) (= main_~v1~0 0) (= main_~l~0 0) (= main_~v4~0 0) (= main_~v2~0 0)) (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0))) [2021-02-24 00:32:28,315 INFO L185 CegarLoopUtils]: At program point L19-1(line 19) the Hoare annotation is: (or (and (= main_~v3~0 0) (= main_~k~0 0) (= main_~i~0 0) (= main_~j~0 0) (= main_~v1~0 0) (= main_~l~0 0) (= main_~v4~0 0) (= main_~v2~0 0)) (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0))) [2021-02-24 00:32:28,315 INFO L185 CegarLoopUtils]: At program point L19-2(line 19) the Hoare annotation is: (or (and (= main_~v3~0 0) (= main_~k~0 0) (= main_~i~0 0) (= main_~j~0 0) (= main_~v1~0 0) (= main_~l~0 0) (= main_~v4~0 0) (= main_~v2~0 0)) (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0))) [2021-02-24 00:32:28,316 INFO L185 CegarLoopUtils]: At program point L36(line 36) the Hoare annotation is: (or (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0)) (let ((.cse3 (+ main_~i~0 main_~j~0 main_~v1~0 main_~k~0 main_~v2~0 main_~v3~0 main_~v4~0))) (and (<= main_~l~0 (+ (* 2 (div (+ main_~l~0 (- 1)) 2)) 1)) (<= (let ((.cse2 (div main_~l~0 4294967296))) (let ((.cse1 (* .cse2 (- 4294967296)))) (let ((.cse0 (div (+ main_~l~0 .cse1) 3))) (+ (* 3 .cse0) (* 4294967298 (div (+ (* .cse0 (- 3)) main_~l~0 .cse1) 4294967296)) (* 4294967296 .cse2) 1)))) main_~l~0) (<= .cse3 main_~l~0) (<= main_~l~0 .cse3)))) [2021-02-24 00:32:28,316 INFO L185 CegarLoopUtils]: At program point L32(line 32) the Hoare annotation is: (or (not (<= ~SIZE~0 20000001)) (let ((.cse3 (+ main_~i~0 main_~j~0 main_~v1~0 main_~k~0 main_~v2~0 main_~v3~0 main_~v4~0))) (and (<= (let ((.cse2 (div main_~l~0 4294967296))) (let ((.cse1 (* .cse2 (- 4294967296)))) (let ((.cse0 (div (+ main_~l~0 .cse1) 6))) (+ (* 6148914694099828736 (div (+ main_~l~0 (* .cse0 (- 6)) .cse1) 4294967296)) (* 8589934592 .cse0) (* 6148914689804861440 .cse2) 1431655764)))) (* 1431655765 main_~l~0)) (<= .cse3 main_~l~0) (<= main_~l~0 .cse3))) (not (<= 20000001 ~SIZE~0))) [2021-02-24 00:32:28,316 INFO L185 CegarLoopUtils]: At program point L28(line 28) the Hoare annotation is: (or (let ((.cse3 (+ main_~i~0 main_~j~0 main_~v1~0 main_~k~0 main_~v2~0 main_~v3~0 main_~v4~0))) (and (<= (let ((.cse2 (div main_~l~0 4294967296))) (let ((.cse1 (* .cse2 (- 4294967296)))) (let ((.cse0 (div (+ main_~l~0 .cse1) 6))) (+ (* 4294967298 (div (+ main_~l~0 (* .cse0 (- 6)) .cse1) 4294967296)) (* 6 .cse0) (* 4294967296 .cse2) 1)))) main_~l~0) (<= .cse3 main_~l~0) (<= main_~l~0 .cse3))) (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0))) [2021-02-24 00:32:28,317 INFO L185 CegarLoopUtils]: At program point L24(line 24) the Hoare annotation is: (or (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0)) (let ((.cse0 (+ main_~i~0 main_~j~0 main_~v1~0 main_~k~0 main_~v2~0 main_~v3~0 main_~v4~0))) (and (<= .cse0 main_~l~0) (<= main_~l~0 .cse0)))) [2021-02-24 00:32:28,317 INFO L185 CegarLoopUtils]: At program point L20(line 20) the Hoare annotation is: (or (and (= main_~v3~0 0) (= main_~k~0 0) (= main_~i~0 0) (= main_~j~0 0) (= main_~v1~0 0) (= main_~l~0 0) (= main_~v4~0 0) (= main_~v2~0 0)) (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0))) [2021-02-24 00:32:28,317 INFO L185 CegarLoopUtils]: At program point L20-1(line 20) the Hoare annotation is: (or (and (= main_~v3~0 0) (= main_~k~0 0) (= main_~i~0 0) (= main_~j~0 0) (= main_~v1~0 0) (= main_~l~0 0) (= main_~v4~0 0) (= main_~v2~0 0)) (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0))) [2021-02-24 00:32:28,318 INFO L185 CegarLoopUtils]: At program point L33(lines 33 36) the Hoare annotation is: (or (not (<= ~SIZE~0 20000001)) (let ((.cse3 (+ main_~i~0 main_~j~0 main_~v1~0 main_~k~0 main_~v2~0 main_~v3~0 main_~v4~0))) (and (<= (let ((.cse2 (div main_~l~0 4294967296))) (let ((.cse1 (* .cse2 (- 4294967296)))) (let ((.cse0 (div (+ main_~l~0 .cse1) 3))) (+ (* 3 .cse0) (* 4294967298 (div (+ (* .cse0 (- 3)) main_~l~0 .cse1) 4294967296)) (* 4294967296 .cse2) 1)))) main_~l~0) (<= .cse3 main_~l~0) (<= main_~l~0 .cse3))) (not (<= 20000001 ~SIZE~0))) [2021-02-24 00:32:28,318 INFO L185 CegarLoopUtils]: At program point L33-2(lines 23 36) the Hoare annotation is: (or (let ((.cse1 (+ main_~l~0 1)) (.cse0 (+ main_~i~0 main_~j~0 main_~v1~0 main_~k~0 main_~v2~0 main_~v3~0 main_~v4~0))) (and (<= .cse0 .cse1) (<= .cse1 .cse0))) (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0))) [2021-02-24 00:32:28,318 INFO L185 CegarLoopUtils]: At program point L29(lines 29 36) the Hoare annotation is: (or (not (<= ~SIZE~0 20000001)) (let ((.cse3 (+ main_~i~0 main_~j~0 main_~v1~0 main_~k~0 main_~v2~0 main_~v3~0 main_~v4~0))) (and (<= (let ((.cse2 (div main_~l~0 4294967296))) (let ((.cse1 (* .cse2 (- 4294967296)))) (let ((.cse0 (div (+ main_~l~0 .cse1) 6))) (+ (* 4294967296 (div (+ main_~l~0 (* .cse0 (- 6)) .cse1) 4294967296)) (* 6 .cse0) (* 4294967296 .cse2) 1)))) main_~l~0) (<= .cse3 main_~l~0) (<= main_~l~0 .cse3))) (not (<= 20000001 ~SIZE~0))) [2021-02-24 00:32:28,318 INFO L185 CegarLoopUtils]: At program point L25(lines 25 36) the Hoare annotation is: (or (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0)) (let ((.cse0 (+ main_~i~0 main_~j~0 main_~v1~0 main_~k~0 main_~v2~0 main_~v3~0 main_~v4~0))) (and (<= .cse0 main_~l~0) (<= main_~l~0 .cse0)))) [2021-02-24 00:32:28,318 INFO L192 CegarLoopUtils]: At program point L21-2(lines 21 39) the Hoare annotation is: true [2021-02-24 00:32:28,318 INFO L192 CegarLoopUtils]: At program point L17(line 17) the Hoare annotation is: true [2021-02-24 00:32:28,319 INFO L185 CegarLoopUtils]: At program point L17-1(line 17) the Hoare annotation is: (or (= main_~i~0 0) (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0))) [2021-02-24 00:32:28,319 INFO L185 CegarLoopUtils]: At program point L17-2(line 17) the Hoare annotation is: (or (and (= main_~k~0 0) (= main_~i~0 0)) (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0))) [2021-02-24 00:32:28,319 INFO L185 CegarLoopUtils]: At program point L17-3(line 17) the Hoare annotation is: (or (not (<= ~SIZE~0 20000001)) (and (= main_~k~0 0) (= main_~i~0 0) (= main_~j~0 0)) (not (<= 20000001 ~SIZE~0))) [2021-02-24 00:32:28,319 INFO L192 CegarLoopUtils]: At program point mainFINAL(lines 16 41) the Hoare annotation is: true [2021-02-24 00:32:28,319 INFO L185 CegarLoopUtils]: At program point L38(line 38) the Hoare annotation is: (or (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0)) (let ((.cse0 (+ main_~i~0 main_~j~0 main_~v1~0 main_~k~0 main_~v2~0 main_~v3~0 main_~v4~0))) (and (<= .cse0 main_~l~0) (<= main_~l~0 .cse0)))) [2021-02-24 00:32:28,319 INFO L185 CegarLoopUtils]: At program point L38-1(lines 21 39) the Hoare annotation is: (or (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0)) (let ((.cse0 (+ main_~i~0 main_~j~0 main_~v1~0 main_~k~0 main_~v2~0 main_~v3~0 main_~v4~0))) (and (<= .cse0 main_~l~0) (<= main_~l~0 .cse0)))) [2021-02-24 00:32:28,320 INFO L185 CegarLoopUtils]: At program point L34(line 34) the Hoare annotation is: (or (let ((.cse3 (+ main_~i~0 main_~j~0 main_~v1~0 main_~k~0 main_~v2~0 main_~v3~0 main_~v4~0))) (and (<= (let ((.cse2 (div main_~l~0 4294967296))) (let ((.cse1 (* .cse2 (- 4294967296)))) (let ((.cse0 (div (+ main_~l~0 .cse1) 3))) (+ (* 3 .cse0) (* 4294967298 (div (+ (* .cse0 (- 3)) main_~l~0 .cse1) 4294967296)) (* 4294967296 .cse2) 1)))) main_~l~0) (<= .cse3 main_~l~0) (<= main_~l~0 (+ (* 2 (div (+ main_~l~0 (- 2)) 2)) 2)) (<= main_~l~0 .cse3))) (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0))) [2021-02-24 00:32:28,320 INFO L185 CegarLoopUtils]: At program point L30(line 30) the Hoare annotation is: (or (let ((.cse3 (+ main_~i~0 main_~j~0 main_~v1~0 main_~k~0 main_~v2~0 main_~v3~0 main_~v4~0))) (and (<= (let ((.cse2 (div main_~l~0 4294967296))) (let ((.cse1 (* .cse2 (- 4294967296)))) (let ((.cse0 (div (+ main_~l~0 .cse1) 6))) (+ (* 4294967296 (div (+ main_~l~0 (* .cse0 (- 6)) .cse1) 4294967296)) (* 6 .cse0) (* 4294967296 .cse2) 1)))) main_~l~0) (<= main_~l~0 (+ (* 2 (div (+ main_~l~0 (- 2)) 2)) 2)) (<= .cse3 main_~l~0) (<= main_~l~0 .cse3))) (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0))) [2021-02-24 00:32:28,320 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 16 41) the Hoare annotation is: true [2021-02-24 00:32:28,320 INFO L185 CegarLoopUtils]: At program point L26(line 26) the Hoare annotation is: (or (let ((.cse0 (+ main_~i~0 main_~j~0 main_~v1~0 main_~k~0 main_~v2~0 main_~v3~0 main_~v4~0))) (and (<= .cse0 main_~l~0) (<= main_~l~0 (+ (* 2 (div (+ main_~l~0 (- 2)) 2)) 2)) (<= main_~l~0 .cse0))) (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0))) [2021-02-24 00:32:28,320 INFO L185 CegarLoopUtils]: At program point L18(line 18) the Hoare annotation is: (or (and (= main_~k~0 0) (= main_~i~0 0) (= main_~j~0 0) (= main_~l~0 0)) (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0))) [2021-02-24 00:32:28,320 INFO L185 CegarLoopUtils]: At program point L18-1(line 18) the Hoare annotation is: (or (not (<= ~SIZE~0 20000001)) (and (= main_~k~0 0) (= main_~i~0 0) (= main_~j~0 0) (= main_~v1~0 0) (= main_~l~0 0)) (not (<= 20000001 ~SIZE~0))) [2021-02-24 00:32:28,321 INFO L185 CegarLoopUtils]: At program point L18-2(line 18) the Hoare annotation is: (or (and (= main_~k~0 0) (= main_~i~0 0) (= main_~j~0 0) (= main_~v1~0 0) (= main_~l~0 0) (= main_~v2~0 0)) (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0))) [2021-02-24 00:32:28,321 INFO L185 CegarLoopUtils]: At program point L18-3(line 18) the Hoare annotation is: (or (not (<= ~SIZE~0 20000001)) (and (= main_~v3~0 0) (= main_~k~0 0) (= main_~i~0 0) (= main_~j~0 0) (= main_~v1~0 0) (= main_~l~0 0) (= main_~v2~0 0)) (not (<= 20000001 ~SIZE~0))) [2021-02-24 00:32:28,321 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 8 13) the Hoare annotation is: true [2021-02-24 00:32:28,321 INFO L185 CegarLoopUtils]: At program point L10(line 10) the Hoare annotation is: (or (not (<= 20000001 ~SIZE~0)) (= |__VERIFIER_assert_#in~cond| 0) (not (<= ~SIZE~0 20000001))) [2021-02-24 00:32:28,321 INFO L185 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 8 13) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (<= ~SIZE~0 20000001)) (not (= __VERIFIER_assert_~cond 0)) (not (<= 20000001 ~SIZE~0))) [2021-02-24 00:32:28,321 INFO L185 CegarLoopUtils]: At program point L9(lines 9 11) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (<= ~SIZE~0 20000001)) (not (= __VERIFIER_assert_~cond 0)) (not (<= 20000001 ~SIZE~0))) [2021-02-24 00:32:28,321 INFO L185 CegarLoopUtils]: At program point L10-1(line 10) the Hoare annotation is: (or (not (<= 20000001 ~SIZE~0)) (= |__VERIFIER_assert_#in~cond| 0) (not (<= ~SIZE~0 20000001))) [2021-02-24 00:32:28,322 INFO L185 CegarLoopUtils]: At program point L9-2(lines 8 13) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (<= ~SIZE~0 20000001)) (not (= __VERIFIER_assert_~cond 0)) (not (<= 20000001 ~SIZE~0))) [2021-02-24 00:32:28,322 INFO L185 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 10) the Hoare annotation is: (or (not (<= 20000001 ~SIZE~0)) (= |__VERIFIER_assert_#in~cond| 0) (not (<= ~SIZE~0 20000001))) [2021-02-24 00:32:28,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 12:32:28 BoogieIcfgContainer [2021-02-24 00:32:28,346 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 00:32:28,347 INFO L168 Benchmark]: Toolchain (without parser) took 106756.88 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 127.9 MB in the beginning and 103.4 MB in the end (delta: 24.6 MB). Peak memory consumption was 130.3 MB. Max. memory is 8.0 GB. [2021-02-24 00:32:28,347 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 151.0 MB. Free memory is still 127.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 00:32:28,347 INFO L168 Benchmark]: CACSL2BoogieTranslator took 278.93 ms. Allocated memory is still 151.0 MB. Free memory was 126.7 MB in the beginning and 117.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-24 00:32:28,347 INFO L168 Benchmark]: Boogie Preprocessor took 44.27 ms. Allocated memory is still 151.0 MB. Free memory was 117.0 MB in the beginning and 115.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-24 00:32:28,348 INFO L168 Benchmark]: RCFGBuilder took 915.90 ms. Allocated memory is still 151.0 MB. Free memory was 115.3 MB in the beginning and 131.9 MB in the end (delta: -16.6 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. [2021-02-24 00:32:28,348 INFO L168 Benchmark]: TraceAbstraction took 105495.40 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 131.9 MB in the beginning and 103.4 MB in the end (delta: 28.5 MB). Peak memory consumption was 133.9 MB. Max. memory is 8.0 GB. [2021-02-24 00:32:28,349 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 151.0 MB. Free memory is still 127.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 278.93 ms. Allocated memory is still 151.0 MB. Free memory was 126.7 MB in the beginning and 117.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 44.27 ms. Allocated memory is still 151.0 MB. Free memory was 117.0 MB in the beginning and 115.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 915.90 ms. Allocated memory is still 151.0 MB. Free memory was 115.3 MB in the beginning and 131.9 MB in the end (delta: -16.6 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 105495.40 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 131.9 MB in the beginning and 103.4 MB in the end (delta: 28.5 MB). Peak memory consumption was 133.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 10]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: (!(SIZE <= 20000001) || !(20000001 <= SIZE)) || (i + j + v1 + k + v2 + v3 + v4 <= l && l <= i + j + v1 + k + v2 + v3 + v4) - ProcedureContractResult [Line: 16]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 8]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: ((\old(cond) == 0 || !(SIZE <= 20000001)) || !(cond == 0)) || !(20000001 <= SIZE) - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 63 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 87.7s, OverallIterations: 27, TraceHistogramMax: 8, AutomataDifference: 66.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 17.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1031 SDtfs, 4596 SDslu, 2310 SDs, 0 SdLazy, 8640 SolverSat, 922 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 31.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 808 GetRequests, 251 SyntacticMatches, 19 SemanticMatches, 538 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3908 ImplicationChecksByTransitivity, 41.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=183occurred in iteration=24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.4s AutomataMinimizationTime, 27 MinimizatonAttempts, 364 StatesRemovedByMinimization, 26 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 55 LocationsWithAnnotation, 440 PreInvPairs, 573 NumberOfFragments, 1387 HoareAnnotationTreeSize, 440 FomulaSimplifications, 1418861181 FormulaSimplificationTreeSizeReduction, 4.2s HoareSimplificationTime, 55 FomulaSimplificationsInter, 6659510 FormulaSimplificationTreeSizeReductionInter, 13.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 17.8s InterpolantComputationTime, 1871 NumberOfCodeBlocks, 1871 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 1844 ConstructedInterpolants, 0 QuantifiedInterpolants, 1717781 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 27 InterpolantComputations, 1 PerfectInterpolantSequences, 707/1638 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...