/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-lit/ddlm2013.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 00:21:05,871 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 00:21:05,876 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 00:21:05,943 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 00:21:06,063 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 00:21:06,089 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 00:21:06,089 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 00:21:06,096 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 00:21:06,096 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 00:21:06,097 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 00:21:06,097 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 00:21:06,097 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 00:21:06,097 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 00:21:06,097 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 00:21:06,098 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 00:21:06,099 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 00:21:06,099 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 00:21:06,100 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 00:21:06,100 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 00:21:06,101 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 00:21:06,101 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 00:21:06,101 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 00:21:06,101 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 00:21:06,102 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 00:21:06,102 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 00:21:06,102 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 00:21:06,102 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 00:21:06,102 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-24 00:21:06,543 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 00:21:06,607 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 00:21:06,611 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 00:21:06,613 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 00:21:06,614 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 00:21:06,615 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/ddlm2013.i [2021-02-24 00:21:06,717 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f62cff7a5/93a85b6e27954b3091a149231f04e45b/FLAGae3684d34 [2021-02-24 00:21:07,438 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 00:21:07,439 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/ddlm2013.i [2021-02-24 00:21:07,449 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f62cff7a5/93a85b6e27954b3091a149231f04e45b/FLAGae3684d34 [2021-02-24 00:21:07,785 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f62cff7a5/93a85b6e27954b3091a149231f04e45b [2021-02-24 00:21:07,789 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 00:21:07,806 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 00:21:07,813 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 00:21:07,813 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 00:21:07,819 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 00:21:07,820 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:21:07" (1/1) ... [2021-02-24 00:21:07,823 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50189761 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:07, skipping insertion in model container [2021-02-24 00:21:07,823 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:21:07" (1/1) ... [2021-02-24 00:21:07,836 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 00:21:07,860 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 00:21:08,128 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-lit/ddlm2013.i[895,908] [2021-02-24 00:21:08,156 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:21:08,168 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 00:21:08,187 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-lit/ddlm2013.i[895,908] [2021-02-24 00:21:08,193 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:21:08,219 INFO L208 MainTranslator]: Completed translation [2021-02-24 00:21:08,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:08 WrapperNode [2021-02-24 00:21:08,220 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 00:21:08,222 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 00:21:08,222 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 00:21:08,222 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 00:21:08,239 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:08" (1/1) ... [2021-02-24 00:21:08,240 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:08" (1/1) ... [2021-02-24 00:21:08,250 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:08" (1/1) ... [2021-02-24 00:21:08,250 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:08" (1/1) ... [2021-02-24 00:21:08,258 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:08" (1/1) ... [2021-02-24 00:21:08,264 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:08" (1/1) ... [2021-02-24 00:21:08,266 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:08" (1/1) ... [2021-02-24 00:21:08,269 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 00:21:08,270 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 00:21:08,270 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 00:21:08,270 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 00:21:08,272 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:08" (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 00:21:08,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 00:21:08,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 00:21:08,402 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 00:21:08,402 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-24 00:21:08,403 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 00:21:08,403 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 00:21:08,404 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 00:21:08,404 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 00:21:08,404 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-24 00:21:08,404 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-24 00:21:08,405 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 00:21:08,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 00:21:08,406 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-24 00:21:08,406 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 00:21:08,407 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-24 00:21:08,407 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 00:21:08,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 00:21:08,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 00:21:08,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 00:21:08,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 00:21:08,410 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 00:21:08,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 00:21:08,920 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 00:21:08,921 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-24 00:21:08,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:21:08 BoogieIcfgContainer [2021-02-24 00:21:08,924 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 00:21:08,926 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 00:21:08,926 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 00:21:08,932 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 00:21:08,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 12:21:07" (1/3) ... [2021-02-24 00:21:08,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77c0e54e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:21:08, skipping insertion in model container [2021-02-24 00:21:08,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:08" (2/3) ... [2021-02-24 00:21:08,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77c0e54e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:21:08, skipping insertion in model container [2021-02-24 00:21:08,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:21:08" (3/3) ... [2021-02-24 00:21:08,937 INFO L111 eAbstractionObserver]: Analyzing ICFG ddlm2013.i [2021-02-24 00:21:08,946 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 00:21:08,952 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 00:21:08,978 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 00:21:09,011 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 00:21:09,012 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 00:21:09,012 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-24 00:21:09,012 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 00:21:09,012 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 00:21:09,013 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 00:21:09,013 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 00:21:09,013 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 00:21:09,037 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states. [2021-02-24 00:21:09,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-24 00:21:09,050 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:21:09,052 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] [2021-02-24 00:21:09,052 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:21:09,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:21:09,061 INFO L82 PathProgramCache]: Analyzing trace with hash 938281063, now seen corresponding path program 1 times [2021-02-24 00:21:09,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:21:09,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077244223] [2021-02-24 00:21:09,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:21:09,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:09,287 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:09,289 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:09,290 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:09,291 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:09,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:21:09,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:09,347 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:09,348 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:09,368 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 00:21:09,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077244223] [2021-02-24 00:21:09,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:21:09,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-24 00:21:09,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681673176] [2021-02-24 00:21:09,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-24 00:21:09,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:21:09,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-24 00:21:09,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 00:21:09,412 INFO L87 Difference]: Start difference. First operand 52 states. Second operand 3 states. [2021-02-24 00:21:09,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:21:09,593 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2021-02-24 00:21:09,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-24 00:21:09,597 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2021-02-24 00:21:09,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:21:09,612 INFO L225 Difference]: With dead ends: 65 [2021-02-24 00:21:09,613 INFO L226 Difference]: Without dead ends: 44 [2021-02-24 00:21:09,618 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 00:21:09,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-02-24 00:21:09,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-02-24 00:21:09,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-02-24 00:21:09,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-02-24 00:21:09,717 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 29 [2021-02-24 00:21:09,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:21:09,718 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-02-24 00:21:09,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-24 00:21:09,719 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-02-24 00:21:09,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-24 00:21:09,722 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:21:09,722 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 00:21:09,723 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 00:21:09,723 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:21:09,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:21:09,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1407892642, now seen corresponding path program 1 times [2021-02-24 00:21:09,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:21:09,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [33413963] [2021-02-24 00:21:09,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:21:09,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:09,831 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:09,832 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:09,834 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:09,834 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:21:09,839 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:09,840 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:09,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:21:09,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:09,874 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:09,875 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:09,879 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 00:21:09,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [33413963] [2021-02-24 00:21:09,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:21:09,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-24 00:21:09,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945647869] [2021-02-24 00:21:09,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-24 00:21:09,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:21:09,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-24 00:21:09,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-24 00:21:09,887 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 4 states. [2021-02-24 00:21:10,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:21:10,049 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2021-02-24 00:21:10,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-24 00:21:10,050 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2021-02-24 00:21:10,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:21:10,052 INFO L225 Difference]: With dead ends: 64 [2021-02-24 00:21:10,052 INFO L226 Difference]: Without dead ends: 43 [2021-02-24 00:21:10,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-24 00:21:10,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-02-24 00:21:10,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-02-24 00:21:10,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-02-24 00:21:10,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-02-24 00:21:10,068 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 31 [2021-02-24 00:21:10,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:21:10,069 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-02-24 00:21:10,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-24 00:21:10,070 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-02-24 00:21:10,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-24 00:21:10,071 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:21:10,071 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 00:21:10,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 00:21:10,072 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:21:10,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:21:10,073 INFO L82 PathProgramCache]: Analyzing trace with hash 309043966, now seen corresponding path program 1 times [2021-02-24 00:21:10,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:21:10,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1920731581] [2021-02-24 00:21:10,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:21:10,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:10,284 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:10,287 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:10,289 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:10,291 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:21:10,311 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:10,312 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:21:10,319 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:10,321 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:21:10,328 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:10,328 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:21:10,342 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:10,343 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:10,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:21:10,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:10,394 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:10,395 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:10,399 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 00:21:10,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1920731581] [2021-02-24 00:21:10,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:21:10,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-24 00:21:10,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381426242] [2021-02-24 00:21:10,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-24 00:21:10,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:21:10,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-24 00:21:10,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-02-24 00:21:10,404 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 7 states. [2021-02-24 00:21:10,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:21:10,699 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2021-02-24 00:21:10,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-24 00:21:10,703 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2021-02-24 00:21:10,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:21:10,705 INFO L225 Difference]: With dead ends: 55 [2021-02-24 00:21:10,705 INFO L226 Difference]: Without dead ends: 48 [2021-02-24 00:21:10,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-02-24 00:21:10,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-02-24 00:21:10,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2021-02-24 00:21:10,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-02-24 00:21:10,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-02-24 00:21:10,730 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 31 [2021-02-24 00:21:10,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:21:10,731 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-02-24 00:21:10,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-24 00:21:10,732 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-02-24 00:21:10,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-24 00:21:10,736 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:21:10,736 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:21:10,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-24 00:21:10,737 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:21:10,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:21:10,738 INFO L82 PathProgramCache]: Analyzing trace with hash -441562392, now seen corresponding path program 1 times [2021-02-24 00:21:10,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:21:10,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [579160955] [2021-02-24 00:21:10,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:21:10,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:10,875 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:10,875 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:10,878 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:10,879 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:21:10,884 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:10,885 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:21:10,892 WARN L141 QuantifierPusher]: treesize reduction 2, result has 83.3 percent of original size [2021-02-24 00:21:10,895 WARN L147 QuantifierPusher]: treesize reduction 2, result has 83.3 percent of original size 10 [2021-02-24 00:21:10,907 WARN L141 QuantifierPusher]: treesize reduction 2, result has 86.7 percent of original size [2021-02-24 00:21:10,910 WARN L147 QuantifierPusher]: treesize reduction 2, result has 86.7 percent of original size 13 [2021-02-24 00:21:10,927 WARN L141 QuantifierPusher]: treesize reduction 2, result has 86.7 percent of original size [2021-02-24 00:21:10,928 WARN L147 QuantifierPusher]: treesize reduction 2, result has 86.7 percent of original size 13 [2021-02-24 00:21:10,941 WARN L141 QuantifierPusher]: treesize reduction 2, result has 88.9 percent of original size [2021-02-24 00:21:10,942 WARN L147 QuantifierPusher]: treesize reduction 2, result has 88.9 percent of original size 16 [2021-02-24 00:21:10,982 WARN L141 QuantifierPusher]: treesize reduction 6, result has 95.4 percent of original size [2021-02-24 00:21:10,989 WARN L147 QuantifierPusher]: treesize reduction 6, result has 95.4 percent of original size 125 [2021-02-24 00:21:11,082 WARN L141 QuantifierPusher]: treesize reduction 6, result has 95.2 percent of original size [2021-02-24 00:21:11,086 WARN L147 QuantifierPusher]: treesize reduction 6, result has 95.2 percent of original size 118 [2021-02-24 00:21:11,177 WARN L141 QuantifierPusher]: treesize reduction 4, result has 96.1 percent of original size [2021-02-24 00:21:11,182 WARN L147 QuantifierPusher]: treesize reduction 4, result has 96.1 percent of original size 99 [2021-02-24 00:21:11,301 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:11,302 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:21:11,315 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:11,316 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:21:11,330 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:11,331 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:11,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:21:11,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:11,373 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:11,374 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:11,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:21:11,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [579160955] [2021-02-24 00:21:11,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:21:11,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-02-24 00:21:11,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132380970] [2021-02-24 00:21:11,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-24 00:21:11,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:21:11,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-24 00:21:11,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-02-24 00:21:11,391 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 14 states. [2021-02-24 00:21:12,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:21:12,242 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2021-02-24 00:21:12,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-24 00:21:12,242 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2021-02-24 00:21:12,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:21:12,244 INFO L225 Difference]: With dead ends: 68 [2021-02-24 00:21:12,244 INFO L226 Difference]: Without dead ends: 61 [2021-02-24 00:21:12,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2021-02-24 00:21:12,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-02-24 00:21:12,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2021-02-24 00:21:12,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-02-24 00:21:12,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2021-02-24 00:21:12,262 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 41 [2021-02-24 00:21:12,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:21:12,262 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2021-02-24 00:21:12,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-02-24 00:21:12,263 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2021-02-24 00:21:12,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-02-24 00:21:12,264 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:21:12,264 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:21:12,265 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-24 00:21:12,265 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:21:12,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:21:12,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1477940818, now seen corresponding path program 2 times [2021-02-24 00:21:12,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:21:12,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1045273701] [2021-02-24 00:21:12,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:21:12,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:12,371 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:12,371 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:12,372 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:12,373 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:21:12,377 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:12,378 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:21:12,386 WARN L141 QuantifierPusher]: treesize reduction 2, result has 83.3 percent of original size [2021-02-24 00:21:12,387 WARN L147 QuantifierPusher]: treesize reduction 2, result has 83.3 percent of original size 10 [2021-02-24 00:21:12,399 WARN L141 QuantifierPusher]: treesize reduction 2, result has 86.7 percent of original size [2021-02-24 00:21:12,400 WARN L147 QuantifierPusher]: treesize reduction 2, result has 86.7 percent of original size 13 [2021-02-24 00:21:12,414 WARN L141 QuantifierPusher]: treesize reduction 2, result has 86.7 percent of original size [2021-02-24 00:21:12,415 WARN L147 QuantifierPusher]: treesize reduction 2, result has 86.7 percent of original size 13 [2021-02-24 00:21:12,429 WARN L141 QuantifierPusher]: treesize reduction 2, result has 88.9 percent of original size [2021-02-24 00:21:12,436 WARN L147 QuantifierPusher]: treesize reduction 2, result has 88.9 percent of original size 16 [2021-02-24 00:21:12,471 WARN L141 QuantifierPusher]: treesize reduction 2, result has 92.0 percent of original size [2021-02-24 00:21:12,475 WARN L147 QuantifierPusher]: treesize reduction 2, result has 92.0 percent of original size 23 [2021-02-24 00:21:12,497 WARN L141 QuantifierPusher]: treesize reduction 2, result has 90.9 percent of original size [2021-02-24 00:21:12,499 WARN L147 QuantifierPusher]: treesize reduction 2, result has 90.9 percent of original size 20 [2021-02-24 00:21:12,522 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:12,523 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-24 00:21:12,544 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:12,545 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-24 00:21:12,568 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:12,569 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-24 00:21:12,595 WARN L141 QuantifierPusher]: treesize reduction 4, result has 96.1 percent of original size [2021-02-24 00:21:12,602 WARN L147 QuantifierPusher]: treesize reduction 4, result has 96.1 percent of original size 99 [2021-02-24 00:21:12,677 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:12,678 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:21:12,696 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:12,697 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:21:12,714 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:12,715 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:12,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:21:12,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:12,772 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:12,774 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:12,789 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:21:12,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1045273701] [2021-02-24 00:21:12,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:21:12,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-02-24 00:21:12,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434515899] [2021-02-24 00:21:12,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-24 00:21:12,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:21:12,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-24 00:21:12,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-02-24 00:21:12,806 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 17 states. [2021-02-24 00:21:13,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:21:13,938 INFO L93 Difference]: Finished difference Result 101 states and 106 transitions. [2021-02-24 00:21:13,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-24 00:21:13,938 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 51 [2021-02-24 00:21:13,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:21:13,940 INFO L225 Difference]: With dead ends: 101 [2021-02-24 00:21:13,940 INFO L226 Difference]: Without dead ends: 71 [2021-02-24 00:21:13,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=172, Invalid=884, Unknown=0, NotChecked=0, Total=1056 [2021-02-24 00:21:13,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-02-24 00:21:13,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2021-02-24 00:21:13,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-02-24 00:21:13,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2021-02-24 00:21:13,960 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 51 [2021-02-24 00:21:13,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:21:13,961 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2021-02-24 00:21:13,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-02-24 00:21:13,961 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2021-02-24 00:21:13,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-02-24 00:21:13,962 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:21:13,963 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:21:13,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-24 00:21:13,963 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:21:13,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:21:13,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1112614204, now seen corresponding path program 3 times [2021-02-24 00:21:13,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:21:13,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1228384256] [2021-02-24 00:21:13,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:21:13,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:14,120 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:14,123 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:14,126 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:14,127 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:21:14,132 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:14,133 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:21:14,141 WARN L141 QuantifierPusher]: treesize reduction 2, result has 83.3 percent of original size [2021-02-24 00:21:14,142 WARN L147 QuantifierPusher]: treesize reduction 2, result has 83.3 percent of original size 10 [2021-02-24 00:21:14,153 WARN L141 QuantifierPusher]: treesize reduction 2, result has 86.7 percent of original size [2021-02-24 00:21:14,154 WARN L147 QuantifierPusher]: treesize reduction 2, result has 86.7 percent of original size 13 [2021-02-24 00:21:14,172 WARN L141 QuantifierPusher]: treesize reduction 2, result has 86.7 percent of original size [2021-02-24 00:21:14,174 WARN L147 QuantifierPusher]: treesize reduction 2, result has 86.7 percent of original size 13 [2021-02-24 00:21:14,188 WARN L141 QuantifierPusher]: treesize reduction 2, result has 88.9 percent of original size [2021-02-24 00:21:14,192 WARN L147 QuantifierPusher]: treesize reduction 2, result has 88.9 percent of original size 16 [2021-02-24 00:21:14,211 WARN L141 QuantifierPusher]: treesize reduction 2, result has 92.0 percent of original size [2021-02-24 00:21:14,212 WARN L147 QuantifierPusher]: treesize reduction 2, result has 92.0 percent of original size 23 [2021-02-24 00:21:14,233 WARN L141 QuantifierPusher]: treesize reduction 2, result has 92.3 percent of original size [2021-02-24 00:21:14,235 WARN L147 QuantifierPusher]: treesize reduction 2, result has 92.3 percent of original size 24 [2021-02-24 00:21:14,255 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:14,256 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 00:21:14,280 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:14,281 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 00:21:14,304 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:14,305 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 00:21:14,329 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:14,330 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-24 00:21:14,352 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:14,353 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-24 00:21:14,376 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:14,377 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-24 00:21:14,378 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:14,380 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-24 00:21:14,404 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:14,405 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-24 00:21:14,434 WARN L141 QuantifierPusher]: treesize reduction 19, result has 81.6 percent of original size [2021-02-24 00:21:14,438 WARN L147 QuantifierPusher]: treesize reduction 19, result has 81.6 percent of original size 84 [2021-02-24 00:21:14,522 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:14,523 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:21:14,543 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:14,544 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:21:14,567 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:14,568 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:14,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:21:14,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:14,616 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:14,617 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:14,634 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:21:14,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1228384256] [2021-02-24 00:21:14,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:21:14,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-02-24 00:21:14,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623910175] [2021-02-24 00:21:14,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-24 00:21:14,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:21:14,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-24 00:21:14,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-02-24 00:21:14,638 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 21 states. [2021-02-24 00:21:15,690 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2021-02-24 00:21:16,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:21:16,623 INFO L93 Difference]: Finished difference Result 93 states and 96 transitions. [2021-02-24 00:21:16,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-24 00:21:16,625 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 61 [2021-02-24 00:21:16,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:21:16,626 INFO L225 Difference]: With dead ends: 93 [2021-02-24 00:21:16,626 INFO L226 Difference]: Without dead ends: 86 [2021-02-24 00:21:16,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=242, Invalid=1480, Unknown=0, NotChecked=0, Total=1722 [2021-02-24 00:21:16,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-02-24 00:21:16,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2021-02-24 00:21:16,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-02-24 00:21:16,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2021-02-24 00:21:16,651 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 61 [2021-02-24 00:21:16,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:21:16,651 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2021-02-24 00:21:16,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-02-24 00:21:16,652 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2021-02-24 00:21:16,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-02-24 00:21:16,653 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:21:16,653 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:21:16,654 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-24 00:21:16,654 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:21:16,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:21:16,655 INFO L82 PathProgramCache]: Analyzing trace with hash -151367043, now seen corresponding path program 1 times [2021-02-24 00:21:16,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:21:16,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1167876556] [2021-02-24 00:21:16,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:21:16,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:16,709 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:16,714 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:16,715 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:16,716 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:21:16,719 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:16,721 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:21:16,731 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size [2021-02-24 00:21:16,732 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size 26 [2021-02-24 00:21:16,754 WARN L141 QuantifierPusher]: treesize reduction 15, result has 51.6 percent of original size [2021-02-24 00:21:16,755 WARN L147 QuantifierPusher]: treesize reduction 15, result has 51.6 percent of original size 16 [2021-02-24 00:21:16,759 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:16,759 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:16,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:21:16,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:16,791 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:16,792 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:16,798 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-24 00:21:16,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1167876556] [2021-02-24 00:21:16,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:21:16,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-02-24 00:21:16,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598451982] [2021-02-24 00:21:16,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-24 00:21:16,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:21:16,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-24 00:21:16,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-24 00:21:16,801 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand 6 states. [2021-02-24 00:21:17,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:21:17,070 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2021-02-24 00:21:17,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-24 00:21:17,071 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 63 [2021-02-24 00:21:17,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:21:17,072 INFO L225 Difference]: With dead ends: 97 [2021-02-24 00:21:17,072 INFO L226 Difference]: Without dead ends: 72 [2021-02-24 00:21:17,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-02-24 00:21:17,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-02-24 00:21:17,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-02-24 00:21:17,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-02-24 00:21:17,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2021-02-24 00:21:17,095 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 63 [2021-02-24 00:21:17,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:21:17,095 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2021-02-24 00:21:17,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-24 00:21:17,096 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2021-02-24 00:21:17,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-02-24 00:21:17,097 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:21:17,097 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:21:17,098 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-24 00:21:17,098 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:21:17,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:21:17,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1836881830, now seen corresponding path program 4 times [2021-02-24 00:21:17,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:21:17,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1838291767] [2021-02-24 00:21:17,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:21:17,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:17,273 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:17,273 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:17,274 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:17,275 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:21:17,278 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:17,279 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:21:17,286 WARN L141 QuantifierPusher]: treesize reduction 2, result has 83.3 percent of original size [2021-02-24 00:21:17,287 WARN L147 QuantifierPusher]: treesize reduction 2, result has 83.3 percent of original size 10 [2021-02-24 00:21:17,301 WARN L141 QuantifierPusher]: treesize reduction 2, result has 86.7 percent of original size [2021-02-24 00:21:17,302 WARN L147 QuantifierPusher]: treesize reduction 2, result has 86.7 percent of original size 13 [2021-02-24 00:21:17,315 WARN L141 QuantifierPusher]: treesize reduction 2, result has 86.7 percent of original size [2021-02-24 00:21:17,316 WARN L147 QuantifierPusher]: treesize reduction 2, result has 86.7 percent of original size 13 [2021-02-24 00:21:17,328 WARN L141 QuantifierPusher]: treesize reduction 2, result has 88.9 percent of original size [2021-02-24 00:21:17,328 WARN L147 QuantifierPusher]: treesize reduction 2, result has 88.9 percent of original size 16 [2021-02-24 00:21:17,346 WARN L141 QuantifierPusher]: treesize reduction 2, result has 92.0 percent of original size [2021-02-24 00:21:17,349 WARN L147 QuantifierPusher]: treesize reduction 2, result has 92.0 percent of original size 23 [2021-02-24 00:21:17,367 WARN L141 QuantifierPusher]: treesize reduction 2, result has 92.3 percent of original size [2021-02-24 00:21:17,371 WARN L147 QuantifierPusher]: treesize reduction 2, result has 92.3 percent of original size 24 [2021-02-24 00:21:17,390 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:17,395 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 00:21:17,413 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:17,415 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 00:21:17,435 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:17,436 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 00:21:17,456 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:17,457 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 00:21:17,480 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:17,481 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 00:21:17,502 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:17,503 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 00:21:17,510 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:17,511 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 00:21:17,538 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:17,540 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 00:21:17,565 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:17,566 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-24 00:21:17,592 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:17,593 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-24 00:21:17,618 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:17,619 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-24 00:21:17,621 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:17,621 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-24 00:21:17,650 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:17,651 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-24 00:21:17,682 WARN L141 QuantifierPusher]: treesize reduction 19, result has 81.6 percent of original size [2021-02-24 00:21:17,683 WARN L147 QuantifierPusher]: treesize reduction 19, result has 81.6 percent of original size 84 [2021-02-24 00:21:17,777 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:17,778 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:21:17,804 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:17,804 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:21:17,833 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:17,834 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:17,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:21:17,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:17,887 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:17,888 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:17,932 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:21:17,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1838291767] [2021-02-24 00:21:17,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:21:17,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-02-24 00:21:17,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280368967] [2021-02-24 00:21:17,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-24 00:21:17,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:21:17,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-24 00:21:17,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-02-24 00:21:17,935 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 25 states. [2021-02-24 00:21:19,026 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2021-02-24 00:21:19,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:21:19,519 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2021-02-24 00:21:19,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-24 00:21:19,520 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 71 [2021-02-24 00:21:19,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:21:19,520 INFO L225 Difference]: With dead ends: 72 [2021-02-24 00:21:19,520 INFO L226 Difference]: Without dead ends: 0 [2021-02-24 00:21:19,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=219, Invalid=1421, Unknown=0, NotChecked=0, Total=1640 [2021-02-24 00:21:19,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-24 00:21:19,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-24 00:21:19,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-24 00:21:19,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-24 00:21:19,523 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 71 [2021-02-24 00:21:19,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:21:19,524 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-24 00:21:19,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-02-24 00:21:19,524 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-24 00:21:19,524 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-24 00:21:19,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-24 00:21:19,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-24 00:21:20,108 WARN L202 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2021-02-24 00:21:20,336 WARN L202 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 43 [2021-02-24 00:21:20,532 WARN L202 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 35 [2021-02-24 00:21:20,700 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 35 [2021-02-24 00:21:20,914 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2021-02-24 00:21:21,197 WARN L202 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 37 [2021-02-24 00:21:21,523 WARN L202 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 35 [2021-02-24 00:21:21,780 WARN L202 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 35 [2021-02-24 00:21:22,020 WARN L202 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 35 [2021-02-24 00:21:22,195 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 35 [2021-02-24 00:21:22,205 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2021-02-24 00:21:22,205 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2021-02-24 00:21:22,206 INFO L189 CegarLoopUtils]: For program point L12-1(line 12) no Hoare annotation was computed. [2021-02-24 00:21:22,206 INFO L189 CegarLoopUtils]: For program point L12-2(line 12) no Hoare annotation was computed. [2021-02-24 00:21:22,206 INFO L189 CegarLoopUtils]: For program point L12-3(line 12) no Hoare annotation was computed. [2021-02-24 00:21:22,206 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-24 00:21:22,206 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-24 00:21:22,206 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line 12) the Hoare annotation is: true [2021-02-24 00:21:22,206 INFO L192 CegarLoopUtils]: At program point L12(line 12) the Hoare annotation is: true [2021-02-24 00:21:22,206 INFO L192 CegarLoopUtils]: At program point L12-1(line 12) the Hoare annotation is: true [2021-02-24 00:21:22,206 INFO L192 CegarLoopUtils]: At program point L12-2(line 12) the Hoare annotation is: true [2021-02-24 00:21:22,207 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 00:21:22,207 INFO L192 CegarLoopUtils]: At program point L12-3(line 12) the Hoare annotation is: true [2021-02-24 00:21:22,207 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-02-24 00:21:22,207 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-02-24 00:21:22,207 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-24 00:21:22,207 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-24 00:21:22,207 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-02-24 00:21:22,207 INFO L189 CegarLoopUtils]: For program point L15(line 15) no Hoare annotation was computed. [2021-02-24 00:21:22,207 INFO L189 CegarLoopUtils]: For program point L15-1(line 15) no Hoare annotation was computed. [2021-02-24 00:21:22,207 INFO L189 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2021-02-24 00:21:22,208 INFO L189 CegarLoopUtils]: For program point L15-3(lines 14 16) no Hoare annotation was computed. [2021-02-24 00:21:22,208 INFO L189 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2021-02-24 00:21:22,208 INFO L185 CegarLoopUtils]: At program point L35-3(line 35) the Hoare annotation is: (let ((.cse5 (+ (* 3 main_~i~0) main_~a~0 3)) (.cse4 (+ (* 3 main_~j~0) main_~b~0)) (.cse7 (+ main_~j~0 main_~b~0)) (.cse6 (+ main_~i~0 main_~a~0 1))) (let ((.cse0 (<= .cse7 .cse6)) (.cse1 (<= .cse5 .cse4)) (.cse2 (<= .cse6 .cse7)) (.cse3 (<= .cse4 .cse5))) (or (and (= main_~i~0 0) (= main_~b~0 0) (= main_~a~0 0) (= main_~j~0 1)) (= main_~flag~0 0) (and .cse0 (<= 4 main_~i~0) .cse1 .cse2 .cse3 (<= main_~i~0 (* 2 (div main_~i~0 2)))) (and (<= 2 main_~i~0) .cse0 .cse1 .cse2 (<= main_~i~0 2) .cse3)))) [2021-02-24 00:21:22,208 INFO L185 CegarLoopUtils]: At program point L31(line 31) the Hoare annotation is: (and (= main_~a~0 0) (= main_~b~0 0) (= main_~j~0 1)) [2021-02-24 00:21:22,208 INFO L185 CegarLoopUtils]: At program point L35-4(lines 24 49) the Hoare annotation is: (or (= main_~flag~0 0) (let ((.cse1 (* 4294967296 (div main_~b~0 4294967296))) (.cse0 (+ (* 4294967296 (div main_~a~0 4294967296)) main_~b~0))) (and (< .cse0 (+ .cse1 main_~a~0 1)) (<= main_~a~0 main_~b~0) (<= (+ .cse1 main_~a~0) .cse0)))) [2021-02-24 00:21:22,209 INFO L192 CegarLoopUtils]: At program point L27(line 27) the Hoare annotation is: true [2021-02-24 00:21:22,209 INFO L192 CegarLoopUtils]: At program point mainEXIT(lines 24 49) the Hoare annotation is: true [2021-02-24 00:21:22,209 INFO L185 CegarLoopUtils]: At program point L40(line 40) the Hoare annotation is: (let ((.cse1 (+ main_~j~0 main_~b~0 1)) (.cse0 (+ main_~i~0 main_~a~0))) (let ((.cse5 (* 2 main_~i~0)) (.cse4 (<= .cse1 .cse0))) (or (let ((.cse3 (+ (* 2 main_~j~0) main_~b~0 2)) (.cse2 (+ .cse5 main_~a~0))) (and (<= .cse0 .cse1) (<= .cse2 .cse3) (<= 4 main_~i~0) (<= main_~i~0 (* 2 (div main_~i~0 2))) .cse4 (<= .cse3 .cse2))) (and (<= (+ .cse5 main_~j~0 main_~a~0) (+ main_~b~0 5)) (<= (+ main_~j~0 main_~a~0) (+ main_~b~0 1)) .cse4 (= main_~j~0 1)) (= main_~flag~0 0)))) [2021-02-24 00:21:22,209 INFO L185 CegarLoopUtils]: At program point L36(line 36) the Hoare annotation is: (let ((.cse5 (+ (* 3 main_~i~0) main_~a~0 3)) (.cse4 (+ (* 3 main_~j~0) main_~b~0)) (.cse7 (+ main_~j~0 main_~b~0)) (.cse6 (+ main_~i~0 main_~a~0 1))) (let ((.cse0 (<= .cse7 .cse6)) (.cse1 (<= .cse5 .cse4)) (.cse2 (<= .cse6 .cse7)) (.cse3 (<= .cse4 .cse5))) (or (and (= main_~i~0 0) (= main_~b~0 0) (= main_~a~0 0) (= main_~j~0 1)) (= main_~flag~0 0) (and .cse0 (<= 4 main_~i~0) .cse1 .cse2 .cse3 (<= main_~i~0 (* 2 (div main_~i~0 2)))) (and (<= 2 main_~i~0) .cse0 .cse1 .cse2 (<= main_~i~0 2) .cse3)))) [2021-02-24 00:21:22,210 INFO L185 CegarLoopUtils]: At program point L36-1(line 36) the Hoare annotation is: (let ((.cse7 (* 3 main_~i~0))) (let ((.cse6 (+ .cse7 main_~a~0 3)) (.cse5 (+ (* 3 main_~j~0) main_~b~0))) (let ((.cse0 (<= (+ .cse7 |main_#t~post5| 3) .cse5)) (.cse1 (<= (+ main_~i~0 |main_#t~post5| 1) (+ main_~j~0 main_~b~0))) (.cse2 (<= .cse6 .cse5)) (.cse3 (<= (+ (* 2 main_~j~0) main_~b~0) (+ (* 2 main_~i~0) |main_#t~post5| 2))) (.cse4 (<= .cse5 .cse6))) (or (and (= main_~i~0 0) (= |main_#t~post5| 0) (= main_~b~0 0) (= main_~a~0 0) (= main_~j~0 1)) (= main_~flag~0 0) (and .cse0 .cse1 (<= 4 main_~i~0) .cse2 .cse3 .cse4 (<= main_~i~0 (* 2 (div main_~i~0 2)))) (and (<= 2 main_~i~0) .cse0 .cse1 .cse2 (<= main_~i~0 2) .cse3 .cse4))))) [2021-02-24 00:21:22,210 INFO L185 CegarLoopUtils]: At program point L36-2(line 36) the Hoare annotation is: (let ((.cse6 (* 2 main_~i~0))) (let ((.cse7 (+ .cse6 main_~a~0 1)) (.cse5 (+ (* 2 main_~j~0) main_~b~0))) (let ((.cse0 (<= (+ (* 3 main_~i~0) |main_#t~post5| 3) (+ (* 3 main_~j~0) main_~b~0))) (.cse1 (<= (+ main_~i~0 |main_#t~post5| 1) (+ main_~j~0 main_~b~0))) (.cse2 (<= .cse7 .cse5)) (.cse3 (<= .cse5 .cse7)) (.cse4 (<= .cse5 (+ .cse6 |main_#t~post5| 2)))) (or (= main_~flag~0 0) (and (<= main_~a~0 1) (= main_~i~0 0) (= |main_#t~post5| 0) (= main_~b~0 0) (<= 1 main_~a~0) (= main_~j~0 1)) (and (<= 2 main_~i~0) .cse0 .cse1 .cse2 .cse3 (<= main_~i~0 2) .cse4) (and .cse0 .cse1 .cse2 .cse3 (<= 4 main_~i~0) .cse4 (<= main_~i~0 (* 2 (div main_~i~0 2)))))))) [2021-02-24 00:21:22,210 INFO L185 CegarLoopUtils]: At program point L28(line 28) the Hoare annotation is: (= main_~a~0 0) [2021-02-24 00:21:22,211 INFO L192 CegarLoopUtils]: At program point L45(lines 45 47) the Hoare annotation is: true [2021-02-24 00:21:22,211 INFO L185 CegarLoopUtils]: At program point L37(line 37) the Hoare annotation is: (let ((.cse5 (+ (* 2 main_~i~0) main_~a~0 1)) (.cse4 (+ (* 2 main_~j~0) main_~b~0)) (.cse7 (+ main_~i~0 main_~a~0)) (.cse6 (+ main_~j~0 main_~b~0))) (let ((.cse0 (<= .cse7 .cse6)) (.cse1 (<= .cse6 .cse7)) (.cse2 (<= .cse5 .cse4)) (.cse3 (<= .cse4 .cse5))) (or (and .cse0 .cse1 .cse2 .cse3 (<= 4 main_~i~0) (<= main_~i~0 (* 2 (div main_~i~0 2)))) (and (<= 2 main_~i~0) .cse0 .cse1 .cse2 .cse3 (<= main_~i~0 2)) (= main_~flag~0 0) (and (<= main_~a~0 1) (= main_~i~0 0) (= main_~b~0 0) (<= 1 main_~a~0) (= main_~j~0 1))))) [2021-02-24 00:21:22,211 INFO L185 CegarLoopUtils]: At program point L33(line 33) the Hoare annotation is: (= main_~flag~0 0) [2021-02-24 00:21:22,211 INFO L185 CegarLoopUtils]: At program point L29(line 29) the Hoare annotation is: (and (= main_~a~0 0) (= main_~b~0 0)) [2021-02-24 00:21:22,211 INFO L192 CegarLoopUtils]: At program point L25(line 25) the Hoare annotation is: true [2021-02-24 00:21:22,212 INFO L192 CegarLoopUtils]: At program point L25-1(line 25) the Hoare annotation is: true [2021-02-24 00:21:22,212 INFO L192 CegarLoopUtils]: At program point L25-2(line 25) the Hoare annotation is: true [2021-02-24 00:21:22,212 INFO L185 CegarLoopUtils]: At program point L46(line 46) the Hoare annotation is: (let ((.cse1 (* 4294967296 (div main_~b~0 4294967296))) (.cse0 (+ (* 4294967296 (div main_~a~0 4294967296)) main_~b~0))) (and (< .cse0 (+ .cse1 main_~a~0 1)) (<= main_~a~0 main_~b~0) (<= (+ .cse1 main_~a~0) .cse0))) [2021-02-24 00:21:22,212 INFO L192 CegarLoopUtils]: At program point mainFINAL(lines 24 49) the Hoare annotation is: true [2021-02-24 00:21:22,212 INFO L185 CegarLoopUtils]: At program point L42(line 42) the Hoare annotation is: (= main_~flag~0 0) [2021-02-24 00:21:22,212 INFO L185 CegarLoopUtils]: At program point L42-1(line 42) the Hoare annotation is: (= main_~flag~0 0) [2021-02-24 00:21:22,213 INFO L185 CegarLoopUtils]: At program point L42-2(line 42) the Hoare annotation is: (= main_~flag~0 0) [2021-02-24 00:21:22,213 INFO L185 CegarLoopUtils]: At program point L38(line 38) the Hoare annotation is: (let ((.cse7 (+ (* 3 main_~i~0) main_~a~0 3)) (.cse6 (+ (* 3 main_~j~0) main_~b~0)) (.cse9 (+ main_~j~0 main_~b~0)) (.cse8 (+ main_~i~0 main_~a~0 1))) (let ((.cse2 (<= .cse9 .cse8)) (.cse3 (<= .cse7 .cse6)) (.cse4 (<= .cse8 .cse9)) (.cse5 (<= .cse6 .cse7))) (or (= main_~flag~0 0) (let ((.cse1 (+ main_~i~0 main_~b~0 1)) (.cse0 (+ main_~j~0 main_~a~0))) (and (= main_~i~0 0) (<= .cse0 .cse1) (<= .cse1 .cse0) (= main_~j~0 1))) (and .cse2 (<= 4 main_~i~0) .cse3 .cse4 .cse5 (<= main_~i~0 (* 2 (div main_~i~0 2)))) (and (<= 2 main_~i~0) .cse2 .cse3 .cse4 (<= main_~i~0 2) .cse5)))) [2021-02-24 00:21:22,213 INFO L185 CegarLoopUtils]: At program point L30(lines 30 34) the Hoare annotation is: (and (= main_~a~0 0) (= main_~b~0 0) (= main_~j~0 1)) [2021-02-24 00:21:22,213 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 24 49) the Hoare annotation is: true [2021-02-24 00:21:22,213 INFO L192 CegarLoopUtils]: At program point L26(line 26) the Hoare annotation is: true [2021-02-24 00:21:22,214 INFO L192 CegarLoopUtils]: At program point L26-1(line 26) the Hoare annotation is: true [2021-02-24 00:21:22,214 INFO L192 CegarLoopUtils]: At program point L26-2(line 26) the Hoare annotation is: true [2021-02-24 00:21:22,214 INFO L185 CegarLoopUtils]: At program point L39(lines 39 43) the Hoare annotation is: (let ((.cse1 (+ main_~j~0 main_~b~0 1)) (.cse0 (+ main_~i~0 main_~a~0))) (let ((.cse5 (* 2 main_~i~0)) (.cse4 (<= .cse1 .cse0))) (or (let ((.cse3 (+ (* 2 main_~j~0) main_~b~0 2)) (.cse2 (+ .cse5 main_~a~0))) (and (<= .cse0 .cse1) (<= .cse2 .cse3) (<= 4 main_~i~0) (<= main_~i~0 (* 2 (div main_~i~0 2))) .cse4 (<= .cse3 .cse2))) (and (<= (+ .cse5 main_~j~0 main_~a~0) (+ main_~b~0 5)) (<= (+ main_~j~0 main_~a~0) (+ main_~b~0 1)) .cse4 (= main_~j~0 1)) (= main_~flag~0 0)))) [2021-02-24 00:21:22,214 INFO L185 CegarLoopUtils]: At program point L39-2(lines 24 49) the Hoare annotation is: (let ((.cse5 (+ (* 3 main_~i~0) main_~a~0 3)) (.cse4 (+ (* 3 main_~j~0) main_~b~0)) (.cse7 (+ main_~j~0 main_~b~0)) (.cse6 (+ main_~i~0 main_~a~0 1))) (let ((.cse0 (<= .cse7 .cse6)) (.cse1 (<= .cse5 .cse4)) (.cse2 (<= .cse6 .cse7)) (.cse3 (<= .cse4 .cse5))) (or (and (= main_~i~0 0) (= main_~a~0 0) (= main_~b~0 0) (= main_~j~0 1)) (= main_~flag~0 0) (and .cse0 (<= 4 main_~i~0) .cse1 .cse2 .cse3 (<= main_~i~0 (* 2 (div main_~i~0 2)))) (and (<= 2 main_~i~0) .cse0 .cse1 .cse2 (<= main_~i~0 2) .cse3)))) [2021-02-24 00:21:22,215 INFO L185 CegarLoopUtils]: At program point L35(lines 35 44) the Hoare annotation is: (let ((.cse5 (+ (* 3 main_~i~0) main_~a~0 3)) (.cse4 (+ (* 3 main_~j~0) main_~b~0)) (.cse7 (+ main_~j~0 main_~b~0)) (.cse6 (+ main_~i~0 main_~a~0 1))) (let ((.cse0 (<= .cse7 .cse6)) (.cse1 (<= .cse5 .cse4)) (.cse2 (<= .cse6 .cse7)) (.cse3 (<= .cse4 .cse5))) (or (and (= main_~i~0 0) (= main_~a~0 0) (= main_~b~0 0) (= main_~j~0 1)) (= main_~flag~0 0) (and .cse0 (<= 4 main_~i~0) .cse1 .cse2 .cse3 (<= main_~i~0 (* 2 (div main_~i~0 2)))) (and (<= 2 main_~i~0) .cse0 .cse1 .cse2 (<= main_~i~0 2) .cse3)))) [2021-02-24 00:21:22,215 INFO L185 CegarLoopUtils]: At program point L35-1(line 35) the Hoare annotation is: (or (= main_~flag~0 0) (let ((.cse1 (* 4294967296 (div main_~b~0 4294967296))) (.cse0 (+ (* 4294967296 (div main_~a~0 4294967296)) main_~b~0))) (and (< .cse0 (+ .cse1 main_~a~0 1)) (<= main_~a~0 main_~b~0) (<= (+ .cse1 main_~a~0) .cse0)))) [2021-02-24 00:21:22,215 INFO L192 CegarLoopUtils]: At program point L18-2(lines 17 22) the Hoare annotation is: true [2021-02-24 00:21:22,215 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2021-02-24 00:21:22,215 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 17 22) the Hoare annotation is: true [2021-02-24 00:21:22,216 INFO L185 CegarLoopUtils]: At program point L19(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-24 00:21:22,216 INFO L185 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-24 00:21:22,216 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 00:21:22,216 INFO L185 CegarLoopUtils]: At program point L19-1(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-24 00:21:22,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 12:21:22 BoogieIcfgContainer [2021-02-24 00:21:22,230 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 00:21:22,232 INFO L168 Benchmark]: Toolchain (without parser) took 14439.83 ms. Allocated memory was 152.0 MB in the beginning and 267.4 MB in the end (delta: 115.3 MB). Free memory was 128.6 MB in the beginning and 243.8 MB in the end (delta: -115.2 MB). Peak memory consumption was 151.6 MB. Max. memory is 8.0 GB. [2021-02-24 00:21:22,232 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 152.0 MB. Free memory is still 126.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 00:21:22,232 INFO L168 Benchmark]: CACSL2BoogieTranslator took 407.74 ms. Allocated memory is still 152.0 MB. Free memory was 127.4 MB in the beginning and 117.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-24 00:21:22,233 INFO L168 Benchmark]: Boogie Preprocessor took 47.24 ms. Allocated memory is still 152.0 MB. Free memory was 117.6 MB in the beginning and 116.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-24 00:21:22,233 INFO L168 Benchmark]: RCFGBuilder took 653.89 ms. Allocated memory is still 152.0 MB. Free memory was 116.3 MB in the beginning and 131.9 MB in the end (delta: -15.7 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-02-24 00:21:22,233 INFO L168 Benchmark]: TraceAbstraction took 13304.28 ms. Allocated memory was 152.0 MB in the beginning and 267.4 MB in the end (delta: 115.3 MB). Free memory was 131.4 MB in the beginning and 243.8 MB in the end (delta: -112.3 MB). Peak memory consumption was 155.0 MB. Max. memory is 8.0 GB. [2021-02-24 00:21:22,235 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 152.0 MB. Free memory is still 126.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 407.74 ms. Allocated memory is still 152.0 MB. Free memory was 127.4 MB in the beginning and 117.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 47.24 ms. Allocated memory is still 152.0 MB. Free memory was 117.6 MB in the beginning and 116.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 653.89 ms. Allocated memory is still 152.0 MB. Free memory was 116.3 MB in the beginning and 131.9 MB in the end (delta: -15.7 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 13304.28 ms. Allocated memory was 152.0 MB in the beginning and 267.4 MB in the end (delta: 115.3 MB). Free memory was 131.4 MB in the beginning and 243.8 MB in the end (delta: -112.3 MB). Peak memory consumption was 155.0 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 - 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, 62 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 10.5s, OverallIterations: 8, TraceHistogramMax: 5, AutomataDifference: 6.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 331 SDtfs, 579 SDslu, 716 SDs, 0 SdLazy, 1755 SolverSat, 83 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 182 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 985 ImplicationChecksByTransitivity, 5.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=78occurred 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, 8 MinimizatonAttempts, 17 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 52 LocationsWithAnnotation, 108 PreInvPairs, 190 NumberOfFragments, 1393 HoareAnnotationTreeSize, 108 FomulaSimplifications, 6557 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 52 FomulaSimplificationsInter, 2528 FormulaSimplificationTreeSizeReductionInter, 2.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.0s InterpolantComputationTime, 378 NumberOfCodeBlocks, 378 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 370 ConstructedInterpolants, 0 QuantifiedInterpolants, 199060 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 25/154 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...