/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops/n.c11.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 00:16:39,038 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 00:16:39,041 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 00:16:39,077 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 00:16:39,092 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 00:16:39,093 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 00:16:39,094 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 00:16:39,106 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 00:16:39,110 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 00:16:39,114 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 00:16:39,123 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 00:16:39,126 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 00:16:39,130 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 00:16:39,131 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 00:16:39,134 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 00:16:39,137 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 00:16:39,148 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 00:16:39,176 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 00:16:39,199 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 00:16:39,200 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 00:16:39,204 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 00:16:39,205 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 00:16:39,205 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 00:16:39,205 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 00:16:39,206 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 00:16:39,206 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 00:16:39,206 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 00:16:39,206 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 00:16:39,207 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 00:16:39,208 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 00:16:39,208 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 00:16:39,208 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 00:16:39,209 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 00:16:39,209 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 00:16:39,209 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 00:16:39,209 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 00:16:39,210 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 00:16:39,210 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 00:16:39,210 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 00:16:39,210 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 00:16:39,211 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-24 00:16:39,632 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 00:16:39,676 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 00:16:39,680 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 00:16:39,681 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 00:16:39,682 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 00:16:39,683 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/n.c11.c [2021-02-24 00:16:39,770 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83fc26235/1a33607f5ccf4ea2a4ef39a62c00ba8b/FLAGf72f9240e [2021-02-24 00:16:40,493 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 00:16:40,494 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c11.c [2021-02-24 00:16:40,501 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83fc26235/1a33607f5ccf4ea2a4ef39a62c00ba8b/FLAGf72f9240e [2021-02-24 00:16:40,845 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83fc26235/1a33607f5ccf4ea2a4ef39a62c00ba8b [2021-02-24 00:16:40,849 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 00:16:40,863 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 00:16:40,864 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 00:16:40,865 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 00:16:40,869 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 00:16:40,870 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:16:40" (1/1) ... [2021-02-24 00:16:40,871 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c6756ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:40, skipping insertion in model container [2021-02-24 00:16:40,871 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:16:40" (1/1) ... [2021-02-24 00:16:40,880 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 00:16:40,895 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 00:16:41,045 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c11.c[317,330] [2021-02-24 00:16:41,060 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:16:41,071 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 00:16:41,085 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c11.c[317,330] [2021-02-24 00:16:41,089 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:16:41,107 INFO L208 MainTranslator]: Completed translation [2021-02-24 00:16:41,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:41 WrapperNode [2021-02-24 00:16:41,108 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 00:16:41,109 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 00:16:41,110 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 00:16:41,110 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 00:16:41,124 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:41" (1/1) ... [2021-02-24 00:16:41,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:41" (1/1) ... [2021-02-24 00:16:41,133 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:41" (1/1) ... [2021-02-24 00:16:41,134 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:41" (1/1) ... [2021-02-24 00:16:41,140 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:41" (1/1) ... [2021-02-24 00:16:41,145 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:41" (1/1) ... [2021-02-24 00:16:41,146 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:41" (1/1) ... [2021-02-24 00:16:41,148 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 00:16:41,150 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 00:16:41,150 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 00:16:41,150 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 00:16:41,151 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 00:16:41,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 00:16:41,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 00:16:41,271 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 00:16:41,272 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 00:16:41,272 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 00:16:41,273 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 00:16:41,273 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 00:16:41,273 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 00:16:41,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 00:16:41,273 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 00:16:41,274 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-02-24 00:16:41,274 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 00:16:41,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 00:16:41,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 00:16:41,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 00:16:41,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 00:16:41,276 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 00:16:41,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 00:16:41,722 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 00:16:41,722 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-24 00:16:41,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:16:41 BoogieIcfgContainer [2021-02-24 00:16:41,728 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 00:16:41,735 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 00:16:41,735 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 00:16:41,744 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 00:16:41,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 12:16:40" (1/3) ... [2021-02-24 00:16:41,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c0a7f28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:16:41, skipping insertion in model container [2021-02-24 00:16:41,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:41" (2/3) ... [2021-02-24 00:16:41,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c0a7f28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:16:41, skipping insertion in model container [2021-02-24 00:16:41,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:16:41" (3/3) ... [2021-02-24 00:16:41,749 INFO L111 eAbstractionObserver]: Analyzing ICFG n.c11.c [2021-02-24 00:16:41,766 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 00:16:41,778 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 00:16:41,798 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 00:16:41,837 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 00:16:41,837 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 00:16:41,837 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-24 00:16:41,837 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 00:16:41,837 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 00:16:41,838 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 00:16:41,838 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 00:16:41,838 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 00:16:41,863 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2021-02-24 00:16:41,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-24 00:16:41,877 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:16:41,879 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] [2021-02-24 00:16:41,879 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:16:41,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:16:41,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1083844101, now seen corresponding path program 1 times [2021-02-24 00:16:41,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:16:41,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875517141] [2021-02-24 00:16:41,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:16:42,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:42,175 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:42,177 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:42,178 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:42,180 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:42,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:16:42,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:42,277 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:42,278 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:42,283 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 00:16:42,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875517141] [2021-02-24 00:16:42,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:16:42,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-24 00:16:42,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474870199] [2021-02-24 00:16:42,293 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-24 00:16:42,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:16:42,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-24 00:16:42,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 00:16:42,311 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2021-02-24 00:16:42,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:16:42,424 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2021-02-24 00:16:42,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-24 00:16:42,427 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2021-02-24 00:16:42,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:16:42,435 INFO L225 Difference]: With dead ends: 49 [2021-02-24 00:16:42,435 INFO L226 Difference]: Without dead ends: 29 [2021-02-24 00:16:42,439 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 00:16:42,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-02-24 00:16:42,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-02-24 00:16:42,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-02-24 00:16:42,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-02-24 00:16:42,493 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 20 [2021-02-24 00:16:42,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:16:42,493 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-02-24 00:16:42,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-24 00:16:42,494 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-02-24 00:16:42,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-24 00:16:42,495 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:16:42,495 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] [2021-02-24 00:16:42,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 00:16:42,496 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:16:42,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:16:42,497 INFO L82 PathProgramCache]: Analyzing trace with hash 232671822, now seen corresponding path program 1 times [2021-02-24 00:16:42,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:16:42,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932430874] [2021-02-24 00:16:42,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:16:42,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:42,573 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:42,575 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:42,583 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:42,584 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:42,593 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:42,594 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:16:42,607 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:42,608 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:16:42,623 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:42,625 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:42,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:16:42,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:42,706 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:42,707 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:42,710 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 00:16:42,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932430874] [2021-02-24 00:16:42,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:16:42,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-24 00:16:42,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74585526] [2021-02-24 00:16:42,713 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-24 00:16:42,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:16:42,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-24 00:16:42,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-24 00:16:42,714 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 6 states. [2021-02-24 00:16:42,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:16:42,939 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2021-02-24 00:16:42,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-24 00:16:42,940 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2021-02-24 00:16:42,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:16:42,942 INFO L225 Difference]: With dead ends: 53 [2021-02-24 00:16:42,942 INFO L226 Difference]: Without dead ends: 35 [2021-02-24 00:16:42,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-02-24 00:16:42,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-02-24 00:16:42,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-02-24 00:16:42,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-02-24 00:16:42,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-02-24 00:16:42,957 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 21 [2021-02-24 00:16:42,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:16:42,957 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-02-24 00:16:42,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-24 00:16:42,958 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-02-24 00:16:42,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-24 00:16:42,959 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:16:42,959 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] [2021-02-24 00:16:42,959 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 00:16:42,959 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:16:42,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:16:42,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1436452214, now seen corresponding path program 1 times [2021-02-24 00:16:42,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:16:42,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [930189422] [2021-02-24 00:16:42,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:16:42,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:43,030 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:43,030 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:43,031 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:43,032 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:43,036 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:43,036 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:43,052 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-24 00:16:43,053 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-24 00:16:43,079 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:43,080 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:16:43,087 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:43,087 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:16:43,094 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:43,095 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:43,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:16:43,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:43,137 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:43,138 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:43,141 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 00:16:43,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [930189422] [2021-02-24 00:16:43,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:16:43,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-02-24 00:16:43,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976135781] [2021-02-24 00:16:43,143 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-24 00:16:43,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:16:43,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-24 00:16:43,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-02-24 00:16:43,145 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 8 states. [2021-02-24 00:16:43,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:16:43,598 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2021-02-24 00:16:43,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-24 00:16:43,598 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2021-02-24 00:16:43,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:16:43,605 INFO L225 Difference]: With dead ends: 60 [2021-02-24 00:16:43,605 INFO L226 Difference]: Without dead ends: 42 [2021-02-24 00:16:43,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-02-24 00:16:43,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-02-24 00:16:43,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2021-02-24 00:16:43,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-02-24 00:16:43,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-02-24 00:16:43,642 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 28 [2021-02-24 00:16:43,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:16:43,643 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-02-24 00:16:43,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-24 00:16:43,643 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-02-24 00:16:43,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-24 00:16:43,645 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:16:43,645 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-02-24 00:16:43,646 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-24 00:16:43,646 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:16:43,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:16:43,647 INFO L82 PathProgramCache]: Analyzing trace with hash -161157810, now seen corresponding path program 2 times [2021-02-24 00:16:43,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:16:43,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438981124] [2021-02-24 00:16:43,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:16:43,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:43,802 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:43,804 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:43,805 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:43,807 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:43,815 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:43,816 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:43,823 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:43,824 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:16:43,836 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:43,837 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:16:43,852 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-24 00:16:43,854 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-24 00:16:43,881 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:43,884 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:16:43,896 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:43,897 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:16:43,911 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:43,912 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:43,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:16:43,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:43,976 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:43,978 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:43,984 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:16:43,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438981124] [2021-02-24 00:16:43,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:16:43,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-02-24 00:16:43,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503939881] [2021-02-24 00:16:43,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-24 00:16:43,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:16:43,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-24 00:16:43,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-02-24 00:16:43,988 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 10 states. [2021-02-24 00:16:44,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:16:44,614 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2021-02-24 00:16:44,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-24 00:16:44,615 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2021-02-24 00:16:44,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:16:44,616 INFO L225 Difference]: With dead ends: 74 [2021-02-24 00:16:44,616 INFO L226 Difference]: Without dead ends: 49 [2021-02-24 00:16:44,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-02-24 00:16:44,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-02-24 00:16:44,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2021-02-24 00:16:44,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-02-24 00:16:44,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2021-02-24 00:16:44,631 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 35 [2021-02-24 00:16:44,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:16:44,632 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2021-02-24 00:16:44,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-24 00:16:44,632 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2021-02-24 00:16:44,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-24 00:16:44,634 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:16:44,634 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-02-24 00:16:44,634 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-24 00:16:44,634 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:16:44,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:16:44,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1240105590, now seen corresponding path program 3 times [2021-02-24 00:16:44,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:16:44,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400484344] [2021-02-24 00:16:44,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:16:44,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:44,696 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:44,698 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:44,699 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:44,702 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:44,706 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:44,708 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:44,714 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:44,715 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:16:44,725 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:44,733 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:16:44,744 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:44,745 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:16:44,756 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:44,757 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:16:44,772 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-24 00:16:44,774 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-24 00:16:44,801 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:44,802 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:16:44,814 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:44,815 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:16:44,828 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:44,829 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:44,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:16:44,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:44,879 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:44,880 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:44,885 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:16:44,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400484344] [2021-02-24 00:16:44,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:16:44,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-02-24 00:16:44,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577478174] [2021-02-24 00:16:44,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-24 00:16:44,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:16:44,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-24 00:16:44,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-02-24 00:16:44,893 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 12 states. [2021-02-24 00:16:45,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:16:45,607 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2021-02-24 00:16:45,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-24 00:16:45,608 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2021-02-24 00:16:45,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:16:45,609 INFO L225 Difference]: With dead ends: 88 [2021-02-24 00:16:45,609 INFO L226 Difference]: Without dead ends: 56 [2021-02-24 00:16:45,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-02-24 00:16:45,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-02-24 00:16:45,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2021-02-24 00:16:45,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-02-24 00:16:45,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-02-24 00:16:45,625 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 42 [2021-02-24 00:16:45,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:16:45,626 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-02-24 00:16:45,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-24 00:16:45,626 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-02-24 00:16:45,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-02-24 00:16:45,627 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:16:45,627 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:16:45,627 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-24 00:16:45,628 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:16:45,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:16:45,628 INFO L82 PathProgramCache]: Analyzing trace with hash 823283790, now seen corresponding path program 4 times [2021-02-24 00:16:45,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:16:45,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [963141220] [2021-02-24 00:16:45,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:16:45,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:45,733 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:45,733 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:45,734 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:45,737 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:45,741 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:45,742 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:45,747 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:45,751 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:16:45,760 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:45,761 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:16:45,771 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:45,776 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:16:45,787 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:45,790 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:16:45,801 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:45,802 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:16:45,815 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:45,816 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:16:45,835 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-24 00:16:45,836 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-24 00:16:45,865 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:45,866 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:16:45,878 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:45,879 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:16:45,891 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:45,892 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:45,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:16:45,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:45,948 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:45,949 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:45,955 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:16:45,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [963141220] [2021-02-24 00:16:45,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:16:45,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-02-24 00:16:45,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316624056] [2021-02-24 00:16:45,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-24 00:16:45,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:16:45,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-24 00:16:45,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-02-24 00:16:45,958 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 14 states. [2021-02-24 00:16:47,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:16:47,005 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2021-02-24 00:16:47,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-24 00:16:47,006 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2021-02-24 00:16:47,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:16:47,008 INFO L225 Difference]: With dead ends: 70 [2021-02-24 00:16:47,008 INFO L226 Difference]: Without dead ends: 64 [2021-02-24 00:16:47,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2021-02-24 00:16:47,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-02-24 00:16:47,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2021-02-24 00:16:47,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-02-24 00:16:47,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2021-02-24 00:16:47,027 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 49 [2021-02-24 00:16:47,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:16:47,027 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2021-02-24 00:16:47,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-02-24 00:16:47,027 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2021-02-24 00:16:47,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-02-24 00:16:47,028 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:16:47,029 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:16:47,029 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-24 00:16:47,029 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:16:47,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:16:47,030 INFO L82 PathProgramCache]: Analyzing trace with hash 922206070, now seen corresponding path program 5 times [2021-02-24 00:16:47,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:16:47,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1325201898] [2021-02-24 00:16:47,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:16:47,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:47,099 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:47,099 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:47,100 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:47,100 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:47,104 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:47,104 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:47,109 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:47,110 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:16:47,118 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:47,130 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:16:47,140 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:47,141 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:16:47,151 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:47,152 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:16:47,164 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:47,165 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:16:47,178 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:47,178 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:16:47,202 WARN L141 QuantifierPusher]: treesize reduction 13, result has 82.9 percent of original size [2021-02-24 00:16:47,206 WARN L147 QuantifierPusher]: treesize reduction 13, result has 82.9 percent of original size 63 [2021-02-24 00:16:47,258 WARN L141 QuantifierPusher]: treesize reduction 25, result has 66.2 percent of original size [2021-02-24 00:16:47,260 WARN L147 QuantifierPusher]: treesize reduction 25, result has 66.2 percent of original size 49 [2021-02-24 00:16:47,262 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:47,263 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:47,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:16:47,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:47,307 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:47,308 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:47,316 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 21 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:16:47,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1325201898] [2021-02-24 00:16:47,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:16:47,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-02-24 00:16:47,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68592726] [2021-02-24 00:16:47,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-24 00:16:47,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:16:47,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-24 00:16:47,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-02-24 00:16:47,318 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 12 states. [2021-02-24 00:16:48,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:16:48,035 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2021-02-24 00:16:48,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-24 00:16:48,036 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 56 [2021-02-24 00:16:48,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:16:48,036 INFO L225 Difference]: With dead ends: 87 [2021-02-24 00:16:48,037 INFO L226 Difference]: Without dead ends: 0 [2021-02-24 00:16:48,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-02-24 00:16:48,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-24 00:16:48,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-24 00:16:48,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-24 00:16:48,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-24 00:16:48,039 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 56 [2021-02-24 00:16:48,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:16:48,039 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-24 00:16:48,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-24 00:16:48,039 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-24 00:16:48,039 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-24 00:16:48,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-24 00:16:48,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-24 00:16:48,648 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 27 [2021-02-24 00:16:48,823 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 25 [2021-02-24 00:16:49,198 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-24 00:16:49,198 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-24 00:16:49,199 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-24 00:16:49,199 INFO L192 CegarLoopUtils]: At program point L3-2(line 3) the Hoare annotation is: true [2021-02-24 00:16:49,199 INFO L192 CegarLoopUtils]: At program point L3-3(line 3) the Hoare annotation is: true [2021-02-24 00:16:49,199 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-24 00:16:49,199 INFO L192 CegarLoopUtils]: At program point L3-4(line 3) the Hoare annotation is: true [2021-02-24 00:16:49,199 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-24 00:16:49,199 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line 3) the Hoare annotation is: true [2021-02-24 00:16:49,200 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-02-24 00:16:49,200 INFO L192 CegarLoopUtils]: At program point L3(line 3) the Hoare annotation is: true [2021-02-24 00:16:49,200 INFO L192 CegarLoopUtils]: At program point L3-1(line 3) the Hoare annotation is: true [2021-02-24 00:16:49,200 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-02-24 00:16:49,200 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-02-24 00:16:49,200 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-24 00:16:49,201 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-24 00:16:49,201 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-02-24 00:16:49,201 INFO L192 CegarLoopUtils]: At program point mainEXIT(lines 14 34) the Hoare annotation is: true [2021-02-24 00:16:49,201 INFO L185 CegarLoopUtils]: At program point L23(lines 23 24) the Hoare annotation is: (or (and (<= 4 main_~len~0) (<= main_~len~0 4)) (and (<= main_~len~0 3) (< 0 (+ (div main_~len~0 4294967296) 1)))) [2021-02-24 00:16:49,201 INFO L185 CegarLoopUtils]: At program point L23-2(lines 23 24) the Hoare annotation is: (or (= main_~len~0 0) (and (<= main_~len~0 1) (<= 1 main_~len~0)) (and (<= main_~len~0 2) (<= 2 main_~len~0)) (and (<= main_~len~0 3) (<= 3 main_~len~0))) [2021-02-24 00:16:49,201 INFO L185 CegarLoopUtils]: At program point L21-1(line 21) the Hoare annotation is: (and (< 0 (+ (div main_~len~0 4294967296) 1)) (<= main_~len~0 4)) [2021-02-24 00:16:49,202 INFO L185 CegarLoopUtils]: At program point L21-3(line 21) the Hoare annotation is: (or (and (<= 4 main_~len~0) (<= main_~len~0 4)) (and (<= main_~len~0 3) (< 0 (+ (div main_~len~0 4294967296) 1)))) [2021-02-24 00:16:49,202 INFO L185 CegarLoopUtils]: At program point L21-4(lines 21 29) the Hoare annotation is: (and (< 0 (+ (div main_~len~0 4294967296) 1)) (<= main_~len~0 4)) [2021-02-24 00:16:49,202 INFO L185 CegarLoopUtils]: At program point L21-5(lines 21 29) the Hoare annotation is: (and (< 0 (+ (div main_~len~0 4294967296) 1)) (<= main_~len~0 4)) [2021-02-24 00:16:49,202 INFO L192 CegarLoopUtils]: At program point mainFINAL(lines 14 34) the Hoare annotation is: true [2021-02-24 00:16:49,202 INFO L192 CegarLoopUtils]: At program point L30(line 30) the Hoare annotation is: true [2021-02-24 00:16:49,202 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 14 34) the Hoare annotation is: true [2021-02-24 00:16:49,203 INFO L185 CegarLoopUtils]: At program point L28(line 28) the Hoare annotation is: (or (= main_~len~0 0) (and (<= main_~len~0 1) (<= 1 main_~len~0)) (and (<= main_~len~0 2) (<= 2 main_~len~0)) (and (<= main_~len~0 3) (<= 3 main_~len~0))) [2021-02-24 00:16:49,203 INFO L185 CegarLoopUtils]: At program point L28-1(line 28) the Hoare annotation is: (or (and (<= main_~len~0 2) (<= 2 |main_#t~post8|) (<= 2 main_~len~0) (<= |main_#t~post8| 2)) (and (= |main_#t~post8| 0) (= main_~len~0 0)) (and (<= |main_#t~post8| 3) (<= main_~len~0 3) (<= 3 main_~len~0) (<= 3 |main_#t~post8|)) (and (<= |main_#t~post8| 1) (<= 1 |main_#t~post8|) (<= main_~len~0 1) (<= 1 main_~len~0))) [2021-02-24 00:16:49,203 INFO L185 CegarLoopUtils]: At program point L28-2(line 28) the Hoare annotation is: (or (and (<= |main_#t~post8| 3) (<= 4 main_~len~0) (<= main_~len~0 4) (<= 3 |main_#t~post8|)) (and (<= main_~len~0 2) (<= 2 main_~len~0) (<= |main_#t~post8| 1) (<= 1 |main_#t~post8|)) (and (<= 2 |main_#t~post8|) (<= main_~len~0 3) (<= |main_#t~post8| 2) (<= 3 main_~len~0)) (and (= |main_#t~post8| 0) (<= main_~len~0 1) (<= 1 main_~len~0))) [2021-02-24 00:16:49,203 INFO L185 CegarLoopUtils]: At program point L24(line 24) the Hoare annotation is: (and (<= 4 main_~len~0) (<= main_~len~0 4)) [2021-02-24 00:16:49,203 INFO L185 CegarLoopUtils]: At program point L18(line 18) the Hoare annotation is: (= main_~len~0 0) [2021-02-24 00:16:49,203 INFO L192 CegarLoopUtils]: At program point L16(line 16) the Hoare annotation is: true [2021-02-24 00:16:49,204 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2021-02-24 00:16:49,204 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 5 10) the Hoare annotation is: true [2021-02-24 00:16:49,204 INFO L185 CegarLoopUtils]: At program point L7(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-24 00:16:49,204 INFO L185 CegarLoopUtils]: At program point L6(lines 6 8) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-02-24 00:16:49,204 INFO L185 CegarLoopUtils]: At program point L7-1(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-24 00:16:49,204 INFO L192 CegarLoopUtils]: At program point L6-2(lines 5 10) the Hoare annotation is: true [2021-02-24 00:16:49,204 INFO L185 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-24 00:16:49,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 12:16:49 BoogieIcfgContainer [2021-02-24 00:16:49,222 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 00:16:49,223 INFO L168 Benchmark]: Toolchain (without parser) took 8372.37 ms. Allocated memory was 152.0 MB in the beginning and 195.0 MB in the end (delta: 43.0 MB). Free memory was 128.6 MB in the beginning and 164.0 MB in the end (delta: -35.4 MB). Peak memory consumption was 108.4 MB. Max. memory is 8.0 GB. [2021-02-24 00:16:49,224 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 152.0 MB. Free memory is still 125.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 00:16:49,224 INFO L168 Benchmark]: CACSL2BoogieTranslator took 244.08 ms. Allocated memory is still 152.0 MB. Free memory was 127.3 MB in the beginning and 118.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-24 00:16:49,225 INFO L168 Benchmark]: Boogie Preprocessor took 39.46 ms. Allocated memory is still 152.0 MB. Free memory was 118.0 MB in the beginning and 116.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-24 00:16:49,226 INFO L168 Benchmark]: RCFGBuilder took 578.00 ms. Allocated memory is still 152.0 MB. Free memory was 116.7 MB in the beginning and 133.6 MB in the end (delta: -16.9 MB). Peak memory consumption was 18.1 MB. Max. memory is 8.0 GB. [2021-02-24 00:16:49,226 INFO L168 Benchmark]: TraceAbstraction took 7487.34 ms. Allocated memory was 152.0 MB in the beginning and 195.0 MB in the end (delta: 43.0 MB). Free memory was 133.1 MB in the beginning and 164.0 MB in the end (delta: -30.8 MB). Peak memory consumption was 112.3 MB. Max. memory is 8.0 GB. [2021-02-24 00:16:49,229 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 152.0 MB. Free memory is still 125.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 244.08 ms. Allocated memory is still 152.0 MB. Free memory was 127.3 MB in the beginning and 118.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.46 ms. Allocated memory is still 152.0 MB. Free memory was 118.0 MB in the beginning and 116.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 578.00 ms. Allocated memory is still 152.0 MB. Free memory was 116.7 MB in the beginning and 133.6 MB in the end (delta: -16.9 MB). Peak memory consumption was 18.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7487.34 ms. Allocated memory was 152.0 MB in the beginning and 195.0 MB in the end (delta: 43.0 MB). Free memory was 133.1 MB in the beginning and 164.0 MB in the end (delta: -30.8 MB). Peak memory consumption was 112.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: 0 < len / 4294967296 + 1 && len <= 4 - ProcedureContractResult [Line: 14]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 5]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.2s, OverallIterations: 7, TraceHistogramMax: 5, AutomataDifference: 3.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 209 SDtfs, 335 SDslu, 567 SDs, 0 SdLazy, 1248 SolverSat, 69 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 131 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 3.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=58occurred in iteration=6, 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, 7 MinimizatonAttempts, 18 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 37 LocationsWithAnnotation, 107 PreInvPairs, 174 NumberOfFragments, 297 HoareAnnotationTreeSize, 107 FomulaSimplifications, 5598 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 37 FomulaSimplificationsInter, 1808 FormulaSimplificationTreeSizeReductionInter, 0.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 251 NumberOfCodeBlocks, 251 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 244 ConstructedInterpolants, 0 QuantifiedInterpolants, 46196 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 21/155 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...