/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/loop-new/half.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 00:21:48,000 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 00:21:48,005 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 00:21:48,064 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 00:21:48,102 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 00:21:48,105 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 00:21:48,108 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 00:21:48,110 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 00:21:48,121 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 00:21:48,125 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 00:21:48,128 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 00:21:48,131 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 00:21:48,132 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 00:21:48,134 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 00:21:48,136 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 00:21:48,137 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 00:21:48,140 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 00:21:48,153 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 00:21:48,167 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 00:21:48,167 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 00:21:48,169 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 00:21:48,169 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 00:21:48,170 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 00:21:48,170 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 00:21:48,170 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 00:21:48,170 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 00:21:48,170 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 00:21:48,171 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 00:21:48,171 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 00:21:48,171 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 00:21:48,171 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 00:21:48,171 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 00:21:48,172 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 00:21:48,172 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 00:21:48,172 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 00:21:48,172 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 00:21:48,173 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 00:21:48,173 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 00:21:48,173 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 00:21:48,173 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 00:21:48,173 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-24 00:21:48,570 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 00:21:48,597 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 00:21:48,601 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 00:21:48,602 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 00:21:48,605 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 00:21:48,607 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/half.i [2021-02-24 00:21:48,698 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d63ac055c/79be76e99471458db7aab04e3fd0ccd0/FLAGa1183277b [2021-02-24 00:21:49,469 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 00:21:49,470 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/half.i [2021-02-24 00:21:49,481 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d63ac055c/79be76e99471458db7aab04e3fd0ccd0/FLAGa1183277b [2021-02-24 00:21:49,802 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d63ac055c/79be76e99471458db7aab04e3fd0ccd0 [2021-02-24 00:21:49,806 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 00:21:49,820 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 00:21:49,822 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 00:21:49,822 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 00:21:49,829 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 00:21:49,830 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:21:49" (1/1) ... [2021-02-24 00:21:49,832 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52de3e5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:49, skipping insertion in model container [2021-02-24 00:21:49,832 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:21:49" (1/1) ... [2021-02-24 00:21:49,841 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 00:21:49,858 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 00:21:50,050 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/half.i[891,904] [2021-02-24 00:21:50,063 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:21:50,074 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 00:21:50,090 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/half.i[891,904] [2021-02-24 00:21:50,094 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:21:50,111 INFO L208 MainTranslator]: Completed translation [2021-02-24 00:21:50,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:50 WrapperNode [2021-02-24 00:21:50,112 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 00:21:50,113 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 00:21:50,114 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 00:21:50,114 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 00:21:50,127 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:50" (1/1) ... [2021-02-24 00:21:50,127 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:50" (1/1) ... [2021-02-24 00:21:50,134 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:50" (1/1) ... [2021-02-24 00:21:50,134 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:50" (1/1) ... [2021-02-24 00:21:50,141 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:50" (1/1) ... [2021-02-24 00:21:50,146 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:50" (1/1) ... [2021-02-24 00:21:50,148 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:50" (1/1) ... [2021-02-24 00:21:50,150 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 00:21:50,151 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 00:21:50,152 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 00:21:50,152 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 00:21:50,153 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:50" (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 00:21:50,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 00:21:50,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 00:21:50,256 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 00:21:50,256 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-24 00:21:50,257 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 00:21:50,257 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 00:21:50,258 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 00:21:50,258 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 00:21:50,258 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-24 00:21:50,258 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-24 00:21:50,259 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 00:21:50,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 00:21:50,260 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-24 00:21:50,260 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 00:21:50,261 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-24 00:21:50,261 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 00:21:50,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 00:21:50,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 00:21:50,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 00:21:50,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 00:21:50,266 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 00:21:50,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 00:21:50,728 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 00:21:50,729 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-24 00:21:50,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:21:50 BoogieIcfgContainer [2021-02-24 00:21:50,731 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 00:21:50,733 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 00:21:50,734 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 00:21:50,738 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 00:21:50,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 12:21:49" (1/3) ... [2021-02-24 00:21:50,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@685613ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:21:50, skipping insertion in model container [2021-02-24 00:21:50,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:50" (2/3) ... [2021-02-24 00:21:50,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@685613ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:21:50, skipping insertion in model container [2021-02-24 00:21:50,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:21:50" (3/3) ... [2021-02-24 00:21:50,743 INFO L111 eAbstractionObserver]: Analyzing ICFG half.i [2021-02-24 00:21:50,751 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 00:21:50,757 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 00:21:50,810 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 00:21:50,862 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 00:21:50,862 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 00:21:50,862 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-24 00:21:50,862 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 00:21:50,863 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 00:21:50,863 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 00:21:50,863 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 00:21:50,863 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 00:21:50,890 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2021-02-24 00:21:50,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-24 00:21:50,905 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:21:50,907 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] [2021-02-24 00:21:50,907 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:21:50,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:21:50,919 INFO L82 PathProgramCache]: Analyzing trace with hash 535719879, now seen corresponding path program 1 times [2021-02-24 00:21:50,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:21:50,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336574635] [2021-02-24 00:21:50,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:21:51,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:51,211 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:51,215 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:51,216 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:51,217 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:51,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:21:51,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:51,347 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:51,352 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:51,358 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 00:21:51,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336574635] [2021-02-24 00:21:51,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:21:51,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-24 00:21:51,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761958846] [2021-02-24 00:21:51,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-24 00:21:51,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:21:51,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-24 00:21:51,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 00:21:51,396 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 3 states. [2021-02-24 00:21:51,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:21:51,485 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2021-02-24 00:21:51,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-24 00:21:51,488 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2021-02-24 00:21:51,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:21:51,497 INFO L225 Difference]: With dead ends: 52 [2021-02-24 00:21:51,497 INFO L226 Difference]: Without dead ends: 31 [2021-02-24 00:21:51,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 00:21:51,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-02-24 00:21:51,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-02-24 00:21:51,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-02-24 00:21:51,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2021-02-24 00:21:51,552 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 23 [2021-02-24 00:21:51,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:21:51,552 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2021-02-24 00:21:51,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-24 00:21:51,553 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2021-02-24 00:21:51,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-24 00:21:51,557 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:21:51,557 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] [2021-02-24 00:21:51,558 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 00:21:51,558 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:21:51,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:21:51,559 INFO L82 PathProgramCache]: Analyzing trace with hash 520943543, now seen corresponding path program 1 times [2021-02-24 00:21:51,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:21:51,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [85732720] [2021-02-24 00:21:51,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:21:51,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:51,653 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:51,654 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:51,655 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:51,656 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:21:51,670 WARN L141 QuantifierPusher]: treesize reduction 4, result has 66.7 percent of original size [2021-02-24 00:21:51,672 WARN L147 QuantifierPusher]: treesize reduction 4, result has 66.7 percent of original size 8 [2021-02-24 00:21:51,681 WARN L141 QuantifierPusher]: treesize reduction 4, result has 75.0 percent of original size [2021-02-24 00:21:51,682 WARN L147 QuantifierPusher]: treesize reduction 4, result has 75.0 percent of original size 12 [2021-02-24 00:21:51,696 WARN L141 QuantifierPusher]: treesize reduction 8, result has 60.0 percent of original size [2021-02-24 00:21:51,697 WARN L147 QuantifierPusher]: treesize reduction 8, result has 60.0 percent of original size 12 [2021-02-24 00:21:51,710 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:51,711 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:21:51,718 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:51,719 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:21:51,726 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:51,727 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:51,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:21:51,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:51,764 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:51,765 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:51,775 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 00:21:51,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [85732720] [2021-02-24 00:21:51,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:21:51,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-24 00:21:51,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513363787] [2021-02-24 00:21:51,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-24 00:21:51,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:21:51,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-24 00:21:51,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-02-24 00:21:51,785 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 9 states. [2021-02-24 00:21:52,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:21:52,236 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2021-02-24 00:21:52,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-24 00:21:52,236 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2021-02-24 00:21:52,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:21:52,238 INFO L225 Difference]: With dead ends: 51 [2021-02-24 00:21:52,238 INFO L226 Difference]: Without dead ends: 35 [2021-02-24 00:21:52,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-02-24 00:21:52,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-02-24 00:21:52,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-02-24 00:21:52,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-02-24 00:21:52,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-02-24 00:21:52,255 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 23 [2021-02-24 00:21:52,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:21:52,256 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-02-24 00:21:52,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-24 00:21:52,256 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-02-24 00:21:52,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-24 00:21:52,257 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:21:52,258 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] [2021-02-24 00:21:52,258 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 00:21:52,258 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:21:52,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:21:52,259 INFO L82 PathProgramCache]: Analyzing trace with hash 430650734, now seen corresponding path program 1 times [2021-02-24 00:21:52,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:21:52,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1469289825] [2021-02-24 00:21:52,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:21:52,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:52,379 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:52,380 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:52,381 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:52,382 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:21:52,386 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:52,387 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:21:52,395 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:52,396 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-02-24 00:21:52,409 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:52,410 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-02-24 00:21:52,426 WARN L141 QuantifierPusher]: treesize reduction 5, result has 85.7 percent of original size [2021-02-24 00:21:52,428 WARN L147 QuantifierPusher]: treesize reduction 5, result has 85.7 percent of original size 30 [2021-02-24 00:21:52,455 WARN L141 QuantifierPusher]: treesize reduction 11, result has 52.2 percent of original size [2021-02-24 00:21:52,456 WARN L147 QuantifierPusher]: treesize reduction 11, result has 52.2 percent of original size 12 [2021-02-24 00:21:52,471 WARN L141 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size [2021-02-24 00:21:52,472 WARN L147 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size 13 [2021-02-24 00:21:52,487 WARN L141 QuantifierPusher]: treesize reduction 15, result has 6.3 percent of original size [2021-02-24 00:21:52,488 WARN L147 QuantifierPusher]: treesize reduction 15, result has 6.3 percent of original size 1 [2021-02-24 00:21:52,488 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:52,489 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:52,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:21:52,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:52,529 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:52,529 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:52,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:21:52,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1469289825] [2021-02-24 00:21:52,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:21:52,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-02-24 00:21:52,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695779651] [2021-02-24 00:21:52,538 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-24 00:21:52,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:21:52,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-24 00:21:52,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-02-24 00:21:52,542 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 10 states. [2021-02-24 00:21:53,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:21:53,028 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2021-02-24 00:21:53,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-24 00:21:53,029 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2021-02-24 00:21:53,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:21:53,030 INFO L225 Difference]: With dead ends: 50 [2021-02-24 00:21:53,030 INFO L226 Difference]: Without dead ends: 45 [2021-02-24 00:21:53,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-02-24 00:21:53,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-02-24 00:21:53,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2021-02-24 00:21:53,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-02-24 00:21:53,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-02-24 00:21:53,045 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 31 [2021-02-24 00:21:53,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:21:53,046 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-02-24 00:21:53,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-24 00:21:53,046 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-02-24 00:21:53,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-24 00:21:53,047 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:21:53,048 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] [2021-02-24 00:21:53,048 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-24 00:21:53,048 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:21:53,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:21:53,049 INFO L82 PathProgramCache]: Analyzing trace with hash -828200805, now seen corresponding path program 1 times [2021-02-24 00:21:53,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:21:53,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [655692092] [2021-02-24 00:21:53,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:21:53,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:53,160 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:53,161 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:53,162 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:53,165 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:21:53,168 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:53,169 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:21:53,176 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:53,176 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:21:53,185 WARN L141 QuantifierPusher]: treesize reduction 6, result has 76.9 percent of original size [2021-02-24 00:21:53,186 WARN L147 QuantifierPusher]: treesize reduction 6, result has 76.9 percent of original size 20 [2021-02-24 00:21:53,202 WARN L141 QuantifierPusher]: treesize reduction 6, result has 76.9 percent of original size [2021-02-24 00:21:53,204 WARN L147 QuantifierPusher]: treesize reduction 6, result has 76.9 percent of original size 20 [2021-02-24 00:21:53,221 WARN L141 QuantifierPusher]: treesize reduction 6, result has 80.6 percent of original size [2021-02-24 00:21:53,222 WARN L147 QuantifierPusher]: treesize reduction 6, result has 80.6 percent of original size 25 [2021-02-24 00:21:53,242 WARN L141 QuantifierPusher]: treesize reduction 10, result has 63.0 percent of original size [2021-02-24 00:21:53,244 WARN L147 QuantifierPusher]: treesize reduction 10, result has 63.0 percent of original size 17 [2021-02-24 00:21:53,267 WARN L141 QuantifierPusher]: treesize reduction 10, result has 63.0 percent of original size [2021-02-24 00:21:53,268 WARN L147 QuantifierPusher]: treesize reduction 10, result has 63.0 percent of original size 17 [2021-02-24 00:21:53,293 WARN L141 QuantifierPusher]: treesize reduction 10, result has 60.0 percent of original size [2021-02-24 00:21:53,294 WARN L147 QuantifierPusher]: treesize reduction 10, result has 60.0 percent of original size 15 [2021-02-24 00:21:53,317 WARN L141 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-02-24 00:21:53,319 WARN L147 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size 9 [2021-02-24 00:21:53,336 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:53,336 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:21:53,351 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:53,352 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:21:53,367 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:53,368 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:53,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:21:53,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:53,408 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:53,409 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:53,414 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:21:53,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [655692092] [2021-02-24 00:21:53,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:21:53,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-02-24 00:21:53,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583151237] [2021-02-24 00:21:53,416 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-24 00:21:53,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:21:53,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-24 00:21:53,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-02-24 00:21:53,418 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 15 states. [2021-02-24 00:21:54,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:21:54,280 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2021-02-24 00:21:54,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-24 00:21:54,281 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2021-02-24 00:21:54,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:21:54,282 INFO L225 Difference]: With dead ends: 55 [2021-02-24 00:21:54,282 INFO L226 Difference]: Without dead ends: 50 [2021-02-24 00:21:54,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2021-02-24 00:21:54,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-02-24 00:21:54,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2021-02-24 00:21:54,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-02-24 00:21:54,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2021-02-24 00:21:54,297 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 36 [2021-02-24 00:21:54,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:21:54,297 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2021-02-24 00:21:54,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-02-24 00:21:54,298 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2021-02-24 00:21:54,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-24 00:21:54,299 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:21:54,299 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-02-24 00:21:54,299 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-24 00:21:54,300 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:21:54,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:21:54,300 INFO L82 PathProgramCache]: Analyzing trace with hash -509096923, now seen corresponding path program 2 times [2021-02-24 00:21:54,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:21:54,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873817940] [2021-02-24 00:21:54,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:21:54,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:54,355 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:54,356 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:54,357 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:54,357 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:21:54,363 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:54,365 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:21:54,377 WARN L141 QuantifierPusher]: treesize reduction 29, result has 59.7 percent of original size [2021-02-24 00:21:54,383 WARN L147 QuantifierPusher]: treesize reduction 29, result has 59.7 percent of original size 43 [2021-02-24 00:21:54,407 WARN L141 QuantifierPusher]: treesize reduction 69, result has 48.1 percent of original size [2021-02-24 00:21:54,411 WARN L147 QuantifierPusher]: treesize reduction 69, result has 48.1 percent of original size 64 [2021-02-24 00:21:54,415 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:54,415 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:54,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:21:54,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:54,450 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:54,451 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:54,454 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:21:54,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873817940] [2021-02-24 00:21:54,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:21:54,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-02-24 00:21:54,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996794022] [2021-02-24 00:21:54,455 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-24 00:21:54,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:21:54,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-24 00:21:54,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-24 00:21:54,457 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 6 states. [2021-02-24 00:21:54,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:21:54,679 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2021-02-24 00:21:54,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-24 00:21:54,680 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2021-02-24 00:21:54,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:21:54,681 INFO L225 Difference]: With dead ends: 61 [2021-02-24 00:21:54,681 INFO L226 Difference]: Without dead ends: 48 [2021-02-24 00:21:54,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-02-24 00:21:54,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-02-24 00:21:54,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-02-24 00:21:54,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-02-24 00:21:54,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2021-02-24 00:21:54,700 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 39 [2021-02-24 00:21:54,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:21:54,701 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2021-02-24 00:21:54,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-24 00:21:54,701 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2021-02-24 00:21:54,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-24 00:21:54,702 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:21:54,702 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] [2021-02-24 00:21:54,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-24 00:21:54,703 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:21:54,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:21:54,704 INFO L82 PathProgramCache]: Analyzing trace with hash 2105786962, now seen corresponding path program 2 times [2021-02-24 00:21:54,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:21:54,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786402552] [2021-02-24 00:21:54,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:21:54,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:54,777 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:54,779 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:54,780 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:54,781 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:21:54,785 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:54,786 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:21:54,792 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:54,793 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:21:54,801 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:54,802 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-24 00:21:54,814 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:54,815 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-24 00:21:54,828 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:54,829 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-24 00:21:54,842 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:54,846 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-24 00:21:54,861 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:54,867 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-24 00:21:54,885 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:54,886 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-24 00:21:54,903 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:54,904 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-24 00:21:54,925 WARN L141 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size [2021-02-24 00:21:54,926 WARN L147 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size 13 [2021-02-24 00:21:54,949 WARN L141 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size [2021-02-24 00:21:54,955 WARN L147 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size 13 [2021-02-24 00:21:54,978 WARN L141 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size [2021-02-24 00:21:54,980 WARN L147 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size 13 [2021-02-24 00:21:55,004 WARN L141 QuantifierPusher]: treesize reduction 15, result has 6.3 percent of original size [2021-02-24 00:21:55,005 WARN L147 QuantifierPusher]: treesize reduction 15, result has 6.3 percent of original size 1 [2021-02-24 00:21:55,005 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:55,006 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:55,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:21:55,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:55,065 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:55,066 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:55,074 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:21:55,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786402552] [2021-02-24 00:21:55,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:21:55,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-02-24 00:21:55,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709823369] [2021-02-24 00:21:55,076 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-24 00:21:55,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:21:55,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-24 00:21:55,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-02-24 00:21:55,078 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 16 states. [2021-02-24 00:21:56,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:21:56,345 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2021-02-24 00:21:56,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-24 00:21:56,346 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2021-02-24 00:21:56,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:21:56,347 INFO L225 Difference]: With dead ends: 76 [2021-02-24 00:21:56,348 INFO L226 Difference]: Without dead ends: 58 [2021-02-24 00:21:56,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=184, Invalid=1006, Unknown=0, NotChecked=0, Total=1190 [2021-02-24 00:21:56,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-02-24 00:21:56,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2021-02-24 00:21:56,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-02-24 00:21:56,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-02-24 00:21:56,365 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 44 [2021-02-24 00:21:56,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:21:56,366 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-02-24 00:21:56,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-02-24 00:21:56,366 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-02-24 00:21:56,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-02-24 00:21:56,368 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:21:56,368 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2021-02-24 00:21:56,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-24 00:21:56,368 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:21:56,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:21:56,369 INFO L82 PathProgramCache]: Analyzing trace with hash 2102561335, now seen corresponding path program 3 times [2021-02-24 00:21:56,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:21:56,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1339541604] [2021-02-24 00:21:56,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:21:56,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:56,459 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:56,460 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:56,460 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:56,461 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:21:56,465 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:56,466 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:21:56,472 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:56,473 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:21:56,481 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:56,483 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-24 00:21:56,495 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:56,497 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-24 00:21:56,509 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:56,510 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-24 00:21:56,523 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:56,523 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-24 00:21:56,542 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:56,544 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-24 00:21:56,560 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:56,562 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-24 00:21:56,581 WARN L141 QuantifierPusher]: treesize reduction 6, result has 80.6 percent of original size [2021-02-24 00:21:56,582 WARN L147 QuantifierPusher]: treesize reduction 6, result has 80.6 percent of original size 25 [2021-02-24 00:21:56,614 WARN L141 QuantifierPusher]: treesize reduction 6, result has 80.6 percent of original size [2021-02-24 00:21:56,615 WARN L147 QuantifierPusher]: treesize reduction 6, result has 80.6 percent of original size 25 [2021-02-24 00:21:56,647 WARN L141 QuantifierPusher]: treesize reduction 6, result has 80.6 percent of original size [2021-02-24 00:21:56,656 WARN L147 QuantifierPusher]: treesize reduction 6, result has 80.6 percent of original size 25 [2021-02-24 00:21:56,690 WARN L141 QuantifierPusher]: treesize reduction 10, result has 63.0 percent of original size [2021-02-24 00:21:56,693 WARN L147 QuantifierPusher]: treesize reduction 10, result has 63.0 percent of original size 17 [2021-02-24 00:21:56,716 WARN L141 QuantifierPusher]: treesize reduction 10, result has 63.0 percent of original size [2021-02-24 00:21:56,717 WARN L147 QuantifierPusher]: treesize reduction 10, result has 63.0 percent of original size 17 [2021-02-24 00:21:56,744 WARN L141 QuantifierPusher]: treesize reduction 10, result has 60.0 percent of original size [2021-02-24 00:21:56,745 WARN L147 QuantifierPusher]: treesize reduction 10, result has 60.0 percent of original size 15 [2021-02-24 00:21:56,773 WARN L141 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-02-24 00:21:56,777 WARN L147 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size 9 [2021-02-24 00:21:56,797 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:56,798 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:21:56,815 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:56,819 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:21:56,837 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:56,839 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:56,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:21:56,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:56,885 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:56,886 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:56,894 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:21:56,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1339541604] [2021-02-24 00:21:56,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:21:56,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-02-24 00:21:56,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813383375] [2021-02-24 00:21:56,896 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-24 00:21:56,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:21:56,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-24 00:21:56,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-02-24 00:21:56,897 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 21 states. [2021-02-24 00:21:58,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:21:58,763 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2021-02-24 00:21:58,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-24 00:21:58,764 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 49 [2021-02-24 00:21:58,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:21:58,765 INFO L225 Difference]: With dead ends: 68 [2021-02-24 00:21:58,766 INFO L226 Difference]: Without dead ends: 63 [2021-02-24 00:21:58,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=278, Invalid=1978, Unknown=0, NotChecked=0, Total=2256 [2021-02-24 00:21:58,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-02-24 00:21:58,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2021-02-24 00:21:58,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-02-24 00:21:58,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2021-02-24 00:21:58,783 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 49 [2021-02-24 00:21:58,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:21:58,783 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2021-02-24 00:21:58,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-02-24 00:21:58,784 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2021-02-24 00:21:58,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-02-24 00:21:58,785 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:21:58,785 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 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 00:21:58,785 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-24 00:21:58,786 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:21:58,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:21:58,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1730622729, now seen corresponding path program 4 times [2021-02-24 00:21:58,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:21:58,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676563275] [2021-02-24 00:21:58,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:21:58,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:58,838 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:58,839 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:58,840 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:58,840 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:21:58,843 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:58,844 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:21:58,848 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:58,849 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:21:58,857 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:58,857 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:21:58,866 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:58,867 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:21:58,879 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:58,880 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:21:58,897 WARN L141 QuantifierPusher]: treesize reduction 57, result has 25.0 percent of original size [2021-02-24 00:21:58,899 WARN L147 QuantifierPusher]: treesize reduction 57, result has 25.0 percent of original size 19 [2021-02-24 00:21:58,932 WARN L141 QuantifierPusher]: treesize reduction 69, result has 30.3 percent of original size [2021-02-24 00:21:58,934 WARN L147 QuantifierPusher]: treesize reduction 69, result has 30.3 percent of original size 30 [2021-02-24 00:21:58,936 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:58,936 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:58,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:21:58,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:58,971 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:58,972 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:58,977 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 19 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:21:58,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676563275] [2021-02-24 00:21:58,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:21:58,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-02-24 00:21:58,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374092110] [2021-02-24 00:21:58,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-24 00:21:58,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:21:58,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-24 00:21:58,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-02-24 00:21:58,980 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 10 states. [2021-02-24 00:21:59,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:21:59,452 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2021-02-24 00:21:59,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-24 00:21:59,453 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 52 [2021-02-24 00:21:59,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:21:59,454 INFO L225 Difference]: With dead ends: 74 [2021-02-24 00:21:59,454 INFO L226 Difference]: Without dead ends: 61 [2021-02-24 00:21:59,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-02-24 00:21:59,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-02-24 00:21:59,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2021-02-24 00:21:59,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-02-24 00:21:59,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2021-02-24 00:21:59,472 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 52 [2021-02-24 00:21:59,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:21:59,473 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2021-02-24 00:21:59,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-24 00:21:59,473 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2021-02-24 00:21:59,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-02-24 00:21:59,474 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:21:59,474 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 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] [2021-02-24 00:21:59,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-24 00:21:59,475 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:21:59,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:21:59,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1938405394, now seen corresponding path program 5 times [2021-02-24 00:21:59,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:21:59,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1697006056] [2021-02-24 00:21:59,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:21:59,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:59,557 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:59,558 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:59,560 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:59,561 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:21:59,568 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:59,569 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:21:59,580 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:59,581 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:21:59,588 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:59,589 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-24 00:21:59,600 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:59,601 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-24 00:21:59,612 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:59,613 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-24 00:21:59,624 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:59,625 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-24 00:21:59,639 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:59,640 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-24 00:21:59,655 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:59,656 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-24 00:21:59,673 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:59,674 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-24 00:21:59,693 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:59,694 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-24 00:21:59,716 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:59,717 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-24 00:21:59,718 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:59,719 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-24 00:21:59,722 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:59,722 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-24 00:21:59,723 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:59,724 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-24 00:21:59,748 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:59,749 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-24 00:21:59,769 WARN L141 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size [2021-02-24 00:21:59,770 WARN L147 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size 13 [2021-02-24 00:21:59,794 WARN L141 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size [2021-02-24 00:21:59,795 WARN L147 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size 13 [2021-02-24 00:21:59,822 WARN L141 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size [2021-02-24 00:21:59,824 WARN L147 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size 13 [2021-02-24 00:21:59,851 WARN L141 QuantifierPusher]: treesize reduction 15, result has 6.3 percent of original size [2021-02-24 00:21:59,852 WARN L147 QuantifierPusher]: treesize reduction 15, result has 6.3 percent of original size 1 [2021-02-24 00:21:59,852 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:59,853 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:59,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:21:59,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:59,901 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:59,902 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:59,911 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-24 00:21:59,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1697006056] [2021-02-24 00:21:59,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:21:59,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-02-24 00:21:59,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879510063] [2021-02-24 00:21:59,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-24 00:21:59,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:21:59,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-24 00:21:59,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-02-24 00:21:59,914 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 19 states. [2021-02-24 00:22:01,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:22:01,233 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2021-02-24 00:22:01,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-24 00:22:01,234 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 57 [2021-02-24 00:22:01,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:22:01,235 INFO L225 Difference]: With dead ends: 82 [2021-02-24 00:22:01,235 INFO L226 Difference]: Without dead ends: 64 [2021-02-24 00:22:01,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=193, Invalid=1139, Unknown=0, NotChecked=0, Total=1332 [2021-02-24 00:22:01,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-02-24 00:22:01,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-02-24 00:22:01,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-02-24 00:22:01,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2021-02-24 00:22:01,254 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 57 [2021-02-24 00:22:01,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:22:01,254 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2021-02-24 00:22:01,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-02-24 00:22:01,255 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2021-02-24 00:22:01,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-02-24 00:22:01,256 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:22:01,256 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 3, 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 00:22:01,256 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-24 00:22:01,256 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:22:01,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:22:01,257 INFO L82 PathProgramCache]: Analyzing trace with hash -195090917, now seen corresponding path program 6 times [2021-02-24 00:22:01,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:22:01,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1022398745] [2021-02-24 00:22:01,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:22:01,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:22:01,328 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:22:01,329 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:22:01,329 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:22:01,331 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:22:01,336 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:22:01,337 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:22:01,346 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:22:01,347 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:22:01,357 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:22:01,358 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-24 00:22:01,368 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:22:01,369 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-24 00:22:01,379 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:22:01,380 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-24 00:22:01,392 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:22:01,394 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-24 00:22:01,407 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:22:01,408 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-24 00:22:01,427 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:22:01,429 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-24 00:22:01,447 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:22:01,456 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-24 00:22:01,475 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:22:01,476 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-24 00:22:01,497 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:22:01,498 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-24 00:22:01,499 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:22:01,500 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-24 00:22:01,500 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:22:01,502 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-24 00:22:01,503 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:22:01,504 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-24 00:22:01,505 WARN L141 QuantifierPusher]: treesize reduction 6, result has 80.6 percent of original size [2021-02-24 00:22:01,506 WARN L147 QuantifierPusher]: treesize reduction 6, result has 80.6 percent of original size 25 [2021-02-24 00:22:01,536 WARN L141 QuantifierPusher]: treesize reduction 6, result has 80.6 percent of original size [2021-02-24 00:22:01,537 WARN L147 QuantifierPusher]: treesize reduction 6, result has 80.6 percent of original size 25 [2021-02-24 00:22:01,570 WARN L141 QuantifierPusher]: treesize reduction 6, result has 80.6 percent of original size [2021-02-24 00:22:01,571 WARN L147 QuantifierPusher]: treesize reduction 6, result has 80.6 percent of original size 25 [2021-02-24 00:22:01,602 WARN L141 QuantifierPusher]: treesize reduction 10, result has 63.0 percent of original size [2021-02-24 00:22:01,606 WARN L147 QuantifierPusher]: treesize reduction 10, result has 63.0 percent of original size 17 [2021-02-24 00:22:01,633 WARN L141 QuantifierPusher]: treesize reduction 10, result has 63.0 percent of original size [2021-02-24 00:22:01,635 WARN L147 QuantifierPusher]: treesize reduction 10, result has 63.0 percent of original size 17 [2021-02-24 00:22:01,663 WARN L141 QuantifierPusher]: treesize reduction 10, result has 60.0 percent of original size [2021-02-24 00:22:01,664 WARN L147 QuantifierPusher]: treesize reduction 10, result has 60.0 percent of original size 15 [2021-02-24 00:22:01,694 WARN L141 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-02-24 00:22:01,695 WARN L147 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size 9 [2021-02-24 00:22:01,720 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:22:01,721 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:22:01,742 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:22:01,743 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:22:01,768 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:22:01,768 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:22:01,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:22:01,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:22:01,821 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:22:01,822 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:22:01,834 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-02-24 00:22:01,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1022398745] [2021-02-24 00:22:01,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:22:01,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-02-24 00:22:01,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143851725] [2021-02-24 00:22:01,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-24 00:22:01,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:22:01,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-24 00:22:01,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-02-24 00:22:01,837 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 23 states. [2021-02-24 00:22:03,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:22:03,424 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2021-02-24 00:22:03,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-24 00:22:03,424 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 62 [2021-02-24 00:22:03,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:22:03,425 INFO L225 Difference]: With dead ends: 63 [2021-02-24 00:22:03,425 INFO L226 Difference]: Without dead ends: 0 [2021-02-24 00:22:03,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=230, Invalid=1662, Unknown=0, NotChecked=0, Total=1892 [2021-02-24 00:22:03,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-24 00:22:03,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-24 00:22:03,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-24 00:22:03,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-24 00:22:03,428 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 62 [2021-02-24 00:22:03,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:22:03,428 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-24 00:22:03,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-02-24 00:22:03,429 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-24 00:22:03,429 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-24 00:22:03,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-24 00:22:03,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-24 00:22:03,974 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 23 [2021-02-24 00:22:04,531 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2021-02-24 00:22:04,532 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2021-02-24 00:22:04,532 INFO L189 CegarLoopUtils]: For program point L12-1(line 12) no Hoare annotation was computed. [2021-02-24 00:22:04,532 INFO L189 CegarLoopUtils]: For program point L12-2(line 12) no Hoare annotation was computed. [2021-02-24 00:22:04,532 INFO L189 CegarLoopUtils]: For program point L12-3(line 12) no Hoare annotation was computed. [2021-02-24 00:22:04,532 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-24 00:22:04,532 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-24 00:22:04,532 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line 12) the Hoare annotation is: true [2021-02-24 00:22:04,533 INFO L192 CegarLoopUtils]: At program point L12(line 12) the Hoare annotation is: true [2021-02-24 00:22:04,533 INFO L192 CegarLoopUtils]: At program point L12-1(line 12) the Hoare annotation is: true [2021-02-24 00:22:04,533 INFO L192 CegarLoopUtils]: At program point L12-2(line 12) the Hoare annotation is: true [2021-02-24 00:22:04,533 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|)) [2021-02-24 00:22:04,533 INFO L192 CegarLoopUtils]: At program point L12-3(line 12) the Hoare annotation is: true [2021-02-24 00:22:04,533 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-02-24 00:22:04,533 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-02-24 00:22:04,534 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-24 00:22:04,534 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-24 00:22:04,534 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-02-24 00:22:04,534 INFO L189 CegarLoopUtils]: For program point L15(line 15) no Hoare annotation was computed. [2021-02-24 00:22:04,534 INFO L189 CegarLoopUtils]: For program point L15-1(line 15) no Hoare annotation was computed. [2021-02-24 00:22:04,534 INFO L189 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2021-02-24 00:22:04,534 INFO L189 CegarLoopUtils]: For program point L15-3(lines 14 16) no Hoare annotation was computed. [2021-02-24 00:22:04,534 INFO L189 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2021-02-24 00:22:04,535 INFO L185 CegarLoopUtils]: At program point L31(line 31) the Hoare annotation is: (let ((.cse0 (* 2 main_~n~0))) (and (<= (+ main_~n~0 1) main_~k~0) (<= .cse0 main_~i~0) (<= main_~i~0 .cse0))) [2021-02-24 00:22:04,535 INFO L185 CegarLoopUtils]: At program point L31-1(line 31) the Hoare annotation is: (let ((.cse1 (* 2 main_~n~0)) (.cse0 (* 2 |main_#t~post5|))) (and (<= (+ main_~n~0 1) main_~k~0) (<= main_~i~0 .cse0) (<= .cse1 main_~i~0) (<= main_~i~0 .cse1) (<= .cse0 main_~i~0))) [2021-02-24 00:22:04,535 INFO L185 CegarLoopUtils]: At program point L29(line 29) the Hoare annotation is: (and (= main_~i~0 0) (= main_~n~0 0)) [2021-02-24 00:22:04,535 INFO L185 CegarLoopUtils]: At program point L31-2(line 31) the Hoare annotation is: (let ((.cse0 (* 2 |main_#t~post5|)) (.cse2 (* 2 main_~n~0)) (.cse1 (+ main_~i~0 2))) (and (<= main_~i~0 .cse0) (<= .cse1 .cse2) (<= .cse0 main_~i~0) (<= .cse2 .cse1) (< main_~n~0 (+ main_~k~0 1)))) [2021-02-24 00:22:04,535 INFO L185 CegarLoopUtils]: At program point L27(line 27) the Hoare annotation is: (and (= main_~i~0 0) (= main_~n~0 0)) [2021-02-24 00:22:04,536 INFO L185 CegarLoopUtils]: At program point L27-1(line 27) the Hoare annotation is: (and (= main_~i~0 0) (= main_~n~0 0)) [2021-02-24 00:22:04,536 INFO L185 CegarLoopUtils]: At program point L29-3(lines 29 33) the Hoare annotation is: (let ((.cse1 (* 2 main_~n~0)) (.cse2 (< main_~n~0 (+ main_~k~0 1)))) (or (let ((.cse0 (+ main_~i~0 2))) (and (<= .cse0 .cse1) (<= .cse1 .cse0) .cse2)) (let ((.cse3 (+ main_~i~0 1))) (and (<= .cse1 .cse3) (<= .cse3 .cse1) .cse2)))) [2021-02-24 00:22:04,536 INFO L185 CegarLoopUtils]: At program point L27-2(line 27) the Hoare annotation is: (and (= main_~i~0 0) (= main_~n~0 0)) [2021-02-24 00:22:04,536 INFO L185 CegarLoopUtils]: At program point L29-4(line 29) the Hoare annotation is: (let ((.cse1 (* 2 main_~n~0)) (.cse3 (< main_~n~0 (+ main_~k~0 1)))) (or (let ((.cse0 (+ |main_#t~post4| 2)) (.cse2 (+ main_~i~0 2))) (and (<= .cse0 .cse1) (<= .cse1 .cse0) (<= .cse2 .cse1) (<= .cse1 .cse2) .cse3)) (let ((.cse5 (+ |main_#t~post4| 1)) (.cse4 (+ main_~i~0 1))) (and (<= .cse1 .cse4) (<= .cse5 .cse1) (<= .cse1 .cse5) (<= .cse4 .cse1) .cse3)))) [2021-02-24 00:22:04,536 INFO L192 CegarLoopUtils]: At program point mainEXIT(lines 24 36) the Hoare annotation is: true [2021-02-24 00:22:04,536 INFO L185 CegarLoopUtils]: At program point L29-5(line 29) the Hoare annotation is: (let ((.cse1 (* 2 main_~n~0)) (.cse2 (< main_~n~0 (+ main_~k~0 1)))) (or (let ((.cse0 (+ |main_#t~post4| 1))) (and (<= .cse0 .cse1) (<= .cse1 .cse0) (<= .cse1 main_~i~0) (<= main_~i~0 .cse1) .cse2)) (let ((.cse3 (+ main_~i~0 1)) (.cse4 (+ |main_#t~post4| 2))) (and (<= .cse1 .cse3) (<= .cse3 .cse1) (<= .cse4 .cse1) (<= .cse1 .cse4) .cse2)))) [2021-02-24 00:22:04,537 INFO L185 CegarLoopUtils]: At program point L29-6(lines 29 33) the Hoare annotation is: (let ((.cse0 (* 2 main_~n~0)) (.cse2 (< main_~n~0 (+ main_~k~0 1)))) (or (let ((.cse1 (+ main_~i~0 1))) (and (<= .cse0 .cse1) (<= .cse1 .cse0) .cse2)) (and (= main_~i~0 0) (= main_~n~0 0)) (and (<= .cse0 main_~i~0) (<= main_~i~0 .cse0) .cse2))) [2021-02-24 00:22:04,537 INFO L185 CegarLoopUtils]: At program point L29-7(lines 29 33) the Hoare annotation is: (or (and (<= main_~k~0 main_~n~0) (< main_~n~0 (+ main_~k~0 1))) (and (= main_~i~0 0) (= main_~n~0 0) (<= main_~k~0 0))) [2021-02-24 00:22:04,537 INFO L192 CegarLoopUtils]: At program point mainFINAL(lines 24 36) the Hoare annotation is: true [2021-02-24 00:22:04,537 INFO L192 CegarLoopUtils]: At program point L34(line 34) the Hoare annotation is: true [2021-02-24 00:22:04,537 INFO L185 CegarLoopUtils]: At program point L30(lines 30 32) the Hoare annotation is: (let ((.cse0 (* 2 main_~n~0))) (or (let ((.cse1 (+ main_~i~0 1))) (and (<= .cse0 .cse1) (<= .cse1 .cse0) (< main_~n~0 (+ main_~k~0 1)))) (and (<= (+ main_~n~0 1) main_~k~0) (<= .cse0 main_~i~0) (<= main_~i~0 .cse0)))) [2021-02-24 00:22:04,537 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 24 36) the Hoare annotation is: true [2021-02-24 00:22:04,537 INFO L185 CegarLoopUtils]: At program point L28(line 28) the Hoare annotation is: (and (= main_~i~0 0) (= main_~n~0 0)) [2021-02-24 00:22:04,537 INFO L192 CegarLoopUtils]: At program point L28-1(line 28) the Hoare annotation is: true [2021-02-24 00:22:04,538 INFO L185 CegarLoopUtils]: At program point L26(line 26) the Hoare annotation is: (= main_~i~0 0) [2021-02-24 00:22:04,538 INFO L192 CegarLoopUtils]: At program point L18-2(lines 17 22) the Hoare annotation is: true [2021-02-24 00:22:04,538 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2021-02-24 00:22:04,538 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 17 22) the Hoare annotation is: true [2021-02-24 00:22:04,538 INFO L185 CegarLoopUtils]: At program point L19(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-24 00:22:04,538 INFO L185 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-24 00:22:04,538 INFO L185 CegarLoopUtils]: At program point L18(lines 18 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-02-24 00:22:04,538 INFO L185 CegarLoopUtils]: At program point L19-1(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-24 00:22:04,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 12:22:04 BoogieIcfgContainer [2021-02-24 00:22:04,562 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 00:22:04,563 INFO L168 Benchmark]: Toolchain (without parser) took 14755.60 ms. Allocated memory was 153.1 MB in the beginning and 282.1 MB in the end (delta: 129.0 MB). Free memory was 128.8 MB in the beginning and 207.3 MB in the end (delta: -78.4 MB). Peak memory consumption was 159.2 MB. Max. memory is 8.0 GB. [2021-02-24 00:22:04,564 INFO L168 Benchmark]: CDTParser took 1.19 ms. Allocated memory is still 153.1 MB. Free memory was 126.5 MB in the beginning and 126.0 MB in the end (delta: 419.6 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 00:22:04,564 INFO L168 Benchmark]: CACSL2BoogieTranslator took 290.56 ms. Allocated memory is still 153.1 MB. Free memory was 127.8 MB in the beginning and 118.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-24 00:22:04,565 INFO L168 Benchmark]: Boogie Preprocessor took 37.11 ms. Allocated memory is still 153.1 MB. Free memory was 118.1 MB in the beginning and 116.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-24 00:22:04,565 INFO L168 Benchmark]: RCFGBuilder took 579.91 ms. Allocated memory is still 153.1 MB. Free memory was 116.7 MB in the beginning and 101.2 MB in the end (delta: 15.5 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-02-24 00:22:04,566 INFO L168 Benchmark]: TraceAbstraction took 13829.06 ms. Allocated memory was 153.1 MB in the beginning and 282.1 MB in the end (delta: 129.0 MB). Free memory was 100.7 MB in the beginning and 207.3 MB in the end (delta: -106.6 MB). Peak memory consumption was 132.0 MB. Max. memory is 8.0 GB. [2021-02-24 00:22:04,567 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.19 ms. Allocated memory is still 153.1 MB. Free memory was 126.5 MB in the beginning and 126.0 MB in the end (delta: 419.6 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 290.56 ms. Allocated memory is still 153.1 MB. Free memory was 127.8 MB in the beginning and 118.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.11 ms. Allocated memory is still 153.1 MB. Free memory was 118.1 MB in the beginning and 116.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 579.91 ms. Allocated memory is still 153.1 MB. Free memory was 116.7 MB in the beginning and 101.2 MB in the end (delta: 15.5 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 13829.06 ms. Allocated memory was 153.1 MB in the beginning and 282.1 MB in the end (delta: 129.0 MB). Free memory was 100.7 MB in the beginning and 207.3 MB in the end (delta: -106.6 MB). Peak memory consumption was 132.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 19]: 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: 29]: Loop Invariant Derived loop invariant: (((2 * n <= i + 1 && i + 1 <= 2 * n) && n < k + 1) || (i == 0 && n == 0)) || ((2 * n <= i && i <= 2 * n) && n < k + 1) - ProcedureContractResult [Line: 24]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 17]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 50 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 12.5s, OverallIterations: 10, TraceHistogramMax: 6, AutomataDifference: 8.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 278 SDtfs, 507 SDslu, 1071 SDs, 0 SdLazy, 2209 SolverSat, 134 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 285 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1519 ImplicationChecksByTransitivity, 7.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=63occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 35 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 40 LocationsWithAnnotation, 110 PreInvPairs, 178 NumberOfFragments, 448 HoareAnnotationTreeSize, 110 FomulaSimplifications, 20967 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 40 FomulaSimplificationsInter, 1370 FormulaSimplificationTreeSizeReductionInter, 0.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.0s InterpolantComputationTime, 416 NumberOfCodeBlocks, 416 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 406 ConstructedInterpolants, 0 QuantifiedInterpolants, 132805 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 2 PerfectInterpolantSequences, 44/273 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...