/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loop-lit/gj2007b.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-a47f07a [2021-04-16 07:14:13,294 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-16 07:14:13,297 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-16 07:14:13,327 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-04-16 07:14:13,365 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-04-16 07:14:13,366 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-04-16 07:14:13,367 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-04-16 07:14:13,367 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-04-16 07:14:13,368 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-04-16 07:14:13,368 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-04-16 07:14:13,369 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-04-16 07:14:13,370 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-04-16 07:14:13,371 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-04-16 07:14:13,373 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-04-16 07:14:13,374 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-04-16 07:14:13,374 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-04-16 07:14:13,376 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-04-16 07:14:13,386 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-04-16 07:14:13,387 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-04-16 07:14:13,387 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-04-16 07:14:13,392 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-04-16 07:14:13,402 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-16 07:14:13,403 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-16 07:14:13,404 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-16 07:14:13,404 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-16 07:14:13,404 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-16 07:14:13,404 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-16 07:14:13,404 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-16 07:14:13,404 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-16 07:14:13,404 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-16 07:14:13,405 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-16 07:14:13,405 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-16 07:14:13,405 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-16 07:14:13,405 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-16 07:14:13,405 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-16 07:14:13,405 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-16 07:14:13,405 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-16 07:14:13,405 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-16 07:14:13,406 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-16 07:14:13,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-16 07:14:13,406 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-16 07:14:13,406 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-04-16 07:14:13,406 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-16 07:14:13,406 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-04-16 07:14:13,406 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-16 07:14:13,664 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-16 07:14:13,678 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-16 07:14:13,680 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-16 07:14:13,681 INFO L271 PluginConnector]: Initializing CDTParser... [2021-04-16 07:14:13,682 INFO L275 PluginConnector]: CDTParser initialized [2021-04-16 07:14:13,683 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007b.i [2021-04-16 07:14:13,746 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5c03e031/a24ea51c82324bb6b693fd48ec545485/FLAGb72415ca2 [2021-04-16 07:14:14,142 INFO L306 CDTParser]: Found 1 translation units. [2021-04-16 07:14:14,143 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007b.i [2021-04-16 07:14:14,148 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5c03e031/a24ea51c82324bb6b693fd48ec545485/FLAGb72415ca2 [2021-04-16 07:14:14,161 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5c03e031/a24ea51c82324bb6b693fd48ec545485 [2021-04-16 07:14:14,163 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-16 07:14:14,165 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-16 07:14:14,168 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-04-16 07:14:14,168 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-04-16 07:14:14,171 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-04-16 07:14:14,172 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.04 07:14:14" (1/1) ... [2021-04-16 07:14:14,172 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ca5dc36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:14:14, skipping insertion in model container [2021-04-16 07:14:14,172 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.04 07:14:14" (1/1) ... [2021-04-16 07:14:14,177 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-04-16 07:14:14,187 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-04-16 07:14:14,306 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/gj2007b.i[895,908] [2021-04-16 07:14:14,317 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-16 07:14:14,322 INFO L203 MainTranslator]: Completed pre-run [2021-04-16 07:14:14,331 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/gj2007b.i[895,908] [2021-04-16 07:14:14,335 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-16 07:14:14,346 INFO L208 MainTranslator]: Completed translation [2021-04-16 07:14:14,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:14:14 WrapperNode [2021-04-16 07:14:14,347 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-04-16 07:14:14,347 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-16 07:14:14,348 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-16 07:14:14,348 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-16 07:14:14,384 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:14:14" (1/1) ... [2021-04-16 07:14:14,384 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:14:14" (1/1) ... [2021-04-16 07:14:14,390 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:14:14" (1/1) ... [2021-04-16 07:14:14,390 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:14:14" (1/1) ... [2021-04-16 07:14:14,400 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:14:14" (1/1) ... [2021-04-16 07:14:14,403 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:14:14" (1/1) ... [2021-04-16 07:14:14,403 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:14:14" (1/1) ... [2021-04-16 07:14:14,404 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-16 07:14:14,406 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-16 07:14:14,406 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-16 07:14:14,406 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-16 07:14:14,407 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:14:14" (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 [2021-04-16 07:14:14,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-04-16 07:14:14,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-16 07:14:14,481 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-04-16 07:14:14,481 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-04-16 07:14:14,482 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-04-16 07:14:14,482 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-04-16 07:14:14,482 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-04-16 07:14:14,482 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-04-16 07:14:14,482 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-04-16 07:14:14,482 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-04-16 07:14:14,482 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-04-16 07:14:14,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-04-16 07:14:14,483 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-04-16 07:14:14,483 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-04-16 07:14:14,483 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-04-16 07:14:14,483 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-04-16 07:14:14,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-04-16 07:14:14,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-04-16 07:14:14,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-16 07:14:14,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-04-16 07:14:14,485 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-04-16 07:14:14,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-04-16 07:14:14,676 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-16 07:14:14,677 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-04-16 07:14:14,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.04 07:14:14 BoogieIcfgContainer [2021-04-16 07:14:14,678 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-16 07:14:14,679 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-16 07:14:14,679 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-16 07:14:14,681 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-16 07:14:14,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.04 07:14:14" (1/3) ... [2021-04-16 07:14:14,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34cce026 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.04 07:14:14, skipping insertion in model container [2021-04-16 07:14:14,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:14:14" (2/3) ... [2021-04-16 07:14:14,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34cce026 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.04 07:14:14, skipping insertion in model container [2021-04-16 07:14:14,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.04 07:14:14" (3/3) ... [2021-04-16 07:14:14,683 INFO L111 eAbstractionObserver]: Analyzing ICFG gj2007b.i [2021-04-16 07:14:14,686 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-04-16 07:14:14,688 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-16 07:14:14,699 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-04-16 07:14:14,711 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-16 07:14:14,712 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-16 07:14:14,712 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-04-16 07:14:14,712 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-16 07:14:14,712 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-16 07:14:14,712 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-16 07:14:14,712 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-16 07:14:14,712 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-16 07:14:14,721 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-04-16 07:14:14,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-04-16 07:14:14,725 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 07:14:14,726 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 07:14:14,726 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 07:14:14,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 07:14:14,730 INFO L82 PathProgramCache]: Analyzing trace with hash -915508507, now seen corresponding path program 1 times [2021-04-16 07:14:14,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 07:14:14,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772784572] [2021-04-16 07:14:14,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 07:14:14,800 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 07:14:14,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 07:14:14,871 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:14,873 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:14:14,874 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:14,874 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:14:14,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 07:14:14,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 07:14:14,933 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:14,934 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:14:14,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-16 07:14:14,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [772784572] [2021-04-16 07:14:14,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 07:14:14,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-16 07:14:14,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488527058] [2021-04-16 07:14:14,940 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-16 07:14:14,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 07:14:14,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-16 07:14:14,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-16 07:14:14,949 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-16 07:14:14,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 07:14:14,993 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2021-04-16 07:14:14,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-16 07:14:14,995 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-04-16 07:14:14,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 07:14:14,999 INFO L225 Difference]: With dead ends: 35 [2021-04-16 07:14:14,999 INFO L226 Difference]: Without dead ends: 17 [2021-04-16 07:14:15,001 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-16 07:14:15,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-04-16 07:14:15,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-04-16 07:14:15,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-04-16 07:14:15,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-04-16 07:14:15,027 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-04-16 07:14:15,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 07:14:15,027 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-04-16 07:14:15,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-16 07:14:15,027 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-04-16 07:14:15,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-04-16 07:14:15,028 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 07:14:15,028 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 07:14:15,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-16 07:14:15,028 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 07:14:15,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 07:14:15,029 INFO L82 PathProgramCache]: Analyzing trace with hash -925667238, now seen corresponding path program 1 times [2021-04-16 07:14:15,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 07:14:15,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965633662] [2021-04-16 07:14:15,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 07:14:15,031 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 07:14:15,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 07:14:15,093 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:15,094 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:14:15,106 INFO L142 QuantifierPusher]: treesize reduction 12, result has 36.8 percent of original size [2021-04-16 07:14:15,107 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-04-16 07:14:15,113 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:15,113 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-16 07:14:15,117 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:15,117 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-16 07:14:15,122 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:15,122 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:14:15,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 07:14:15,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 07:14:15,182 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:15,182 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:14:15,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-16 07:14:15,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965633662] [2021-04-16 07:14:15,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 07:14:15,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-16 07:14:15,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885663570] [2021-04-16 07:14:15,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-16 07:14:15,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 07:14:15,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-16 07:14:15,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-04-16 07:14:15,184 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-16 07:14:15,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 07:14:15,323 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-04-16 07:14:15,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-16 07:14:15,333 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-04-16 07:14:15,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 07:14:15,333 INFO L225 Difference]: With dead ends: 28 [2021-04-16 07:14:15,334 INFO L226 Difference]: Without dead ends: 26 [2021-04-16 07:14:15,334 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 128.3ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-04-16 07:14:15,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-04-16 07:14:15,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-04-16 07:14:15,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.3125) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-04-16 07:14:15,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-04-16 07:14:15,341 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 11 [2021-04-16 07:14:15,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 07:14:15,341 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-04-16 07:14:15,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-16 07:14:15,342 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-04-16 07:14:15,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-16 07:14:15,342 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 07:14:15,342 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 07:14:15,342 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-16 07:14:15,342 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 07:14:15,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 07:14:15,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1147629988, now seen corresponding path program 1 times [2021-04-16 07:14:15,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 07:14:15,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210555840] [2021-04-16 07:14:15,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 07:14:15,374 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:15,383 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-04-16 07:14:15,384 INFO L175 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_8 v_main_~n~0_8) (<= 0 (+ |v_main_#t~nondet4_7| 2147483648)) (<= |v_main_#t~nondet4_7| 2147483647) (not (= |v_main_#t~nondet4_7| 0))) InVars {main_#t~nondet4=|v_main_#t~nondet4_7|, main_~n~0=v_main_~n~0_8, main_~x~0=v_main_~x~0_8} OutVars{main_#t~nondet4=|v_main_#t~nondet4_7|, main_~n~0=v_main_~n~0_8, main_~x~0=v_main_~x~0_8} AuxVars[] AssignedVars[] [2021-04-16 07:14:15,395 WARN L240 tifierPushTermWalker]: treesize reduction 14, result has 88.5 percent of original size [2021-04-16 07:14:15,403 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:15,408 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:15,420 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:15,424 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:15,425 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-04-16 07:14:15,431 INFO L108 tifierPushTermWalker]: treesize reduction 2, result has 33.3 percent of original size [2021-04-16 07:14:15,434 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:15,435 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-04-16 07:14:15,437 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:15,442 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:15,450 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:15,451 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-04-16 07:14:15,455 INFO L108 tifierPushTermWalker]: treesize reduction 2, result has 33.3 percent of original size [2021-04-16 07:14:15,457 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:15,460 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:15,462 INFO L118 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:15,466 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:15,469 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:15,478 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:15,480 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:15,488 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:15,490 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:15,492 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:15,498 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:15,500 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:15,503 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:15,505 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:15,509 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:15,510 WARN L245 tifierPushTermWalker]: treesize reduction 14, result has 88.5 percent of original size 94 [2021-04-16 07:14:15,545 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:15,547 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 67 [2021-04-16 07:14:15,548 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-04-16 07:14:15,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 07:14:15,585 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:15,586 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:14:15,586 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:15,587 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 07:14:15,590 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:15,590 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-04-16 07:14:15,605 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:15,605 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-04-16 07:14:15,612 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:15,612 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-16 07:14:15,618 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:15,619 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-16 07:14:15,625 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:15,625 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:14:15,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 07:14:15,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 07:14:15,665 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:15,665 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:14:15,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-16 07:14:15,670 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:15,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-04-16 07:14:15,673 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:15,673 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 07:14:15,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-04-16 07:14:15,676 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:15,676 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-04-16 07:14:15,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-04-16 07:14:15,680 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:15,681 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-04-16 07:14:15,683 INFO L147 QuantifierPusher]: treesize reduction 20, result has 66.1 percent of original size 39 [2021-04-16 07:14:15,730 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:15,731 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-04-16 07:14:15,758 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:15,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-04-16 07:14:15,761 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:15,761 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-04-16 07:14:15,762 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-04-16 07:14:15,791 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:15,792 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-04-16 07:14:15,811 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:15,811 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:14:15,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210555840] [2021-04-16 07:14:15,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 07:14:15,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-04-16 07:14:15,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947728931] [2021-04-16 07:14:15,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-16 07:14:15,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 07:14:15,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-16 07:14:15,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-04-16 07:14:15,813 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-16 07:14:16,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 07:14:16,230 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2021-04-16 07:14:16,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-16 07:14:16,230 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-04-16 07:14:16,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 07:14:16,232 INFO L225 Difference]: With dead ends: 47 [2021-04-16 07:14:16,232 INFO L226 Difference]: Without dead ends: 43 [2021-04-16 07:14:16,233 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 425.8ms TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-04-16 07:14:16,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-04-16 07:14:16,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 29. [2021-04-16 07:14:16,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.35) internal successors, (27), 22 states have internal predecessors, (27), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-04-16 07:14:16,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-04-16 07:14:16,239 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 14 [2021-04-16 07:14:16,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 07:14:16,240 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-04-16 07:14:16,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-16 07:14:16,240 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-04-16 07:14:16,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-16 07:14:16,240 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 07:14:16,240 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 07:14:16,241 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-04-16 07:14:16,241 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 07:14:16,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 07:14:16,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1885482061, now seen corresponding path program 1 times [2021-04-16 07:14:16,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 07:14:16,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676545778] [2021-04-16 07:14:16,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 07:14:16,243 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 07:14:16,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 07:14:16,260 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:16,264 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:14:16,265 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:16,272 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 07:14:16,274 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:16,274 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 07:14:16,281 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:16,281 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-16 07:14:16,285 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:16,286 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-16 07:14:16,290 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:16,290 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:14:16,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 07:14:16,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 07:14:16,309 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:16,309 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:14:16,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-04-16 07:14:16,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 07:14:16,312 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:16,313 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:14:16,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-16 07:14:16,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676545778] [2021-04-16 07:14:16,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 07:14:16,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-04-16 07:14:16,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872252055] [2021-04-16 07:14:16,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-16 07:14:16,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 07:14:16,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-16 07:14:16,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-04-16 07:14:16,314 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-04-16 07:14:16,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 07:14:16,451 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2021-04-16 07:14:16,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-16 07:14:16,452 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2021-04-16 07:14:16,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 07:14:16,453 INFO L225 Difference]: With dead ends: 44 [2021-04-16 07:14:16,453 INFO L226 Difference]: Without dead ends: 32 [2021-04-16 07:14:16,454 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 99.3ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-04-16 07:14:16,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-04-16 07:14:16,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2021-04-16 07:14:16,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 21 states have internal predecessors, (25), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-04-16 07:14:16,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-04-16 07:14:16,463 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 16 [2021-04-16 07:14:16,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 07:14:16,463 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-04-16 07:14:16,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-04-16 07:14:16,463 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-04-16 07:14:16,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-16 07:14:16,463 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 07:14:16,464 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 07:14:16,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-04-16 07:14:16,464 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 07:14:16,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 07:14:16,464 INFO L82 PathProgramCache]: Analyzing trace with hash 427578968, now seen corresponding path program 1 times [2021-04-16 07:14:16,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 07:14:16,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506296581] [2021-04-16 07:14:16,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 07:14:16,481 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-04-16 07:14:16,482 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 07:14:16,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 07:14:16,510 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:16,510 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:14:16,511 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:16,511 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 07:14:16,513 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:16,513 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 07:14:16,516 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:16,517 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 07:14:16,520 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:16,521 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-16 07:14:16,525 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:16,525 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-16 07:14:16,530 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:16,531 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:14:16,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 07:14:16,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 07:14:16,554 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:16,555 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:14:16,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-16 07:14:16,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506296581] [2021-04-16 07:14:16,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 07:14:16,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-04-16 07:14:16,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316045486] [2021-04-16 07:14:16,555 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-16 07:14:16,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 07:14:16,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-16 07:14:16,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-04-16 07:14:16,556 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-16 07:14:16,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 07:14:16,728 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2021-04-16 07:14:16,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-16 07:14:16,729 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-04-16 07:14:16,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 07:14:16,731 INFO L225 Difference]: With dead ends: 49 [2021-04-16 07:14:16,731 INFO L226 Difference]: Without dead ends: 45 [2021-04-16 07:14:16,731 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 120.0ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-04-16 07:14:16,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-04-16 07:14:16,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 22. [2021-04-16 07:14:16,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-04-16 07:14:16,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-04-16 07:14:16,736 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2021-04-16 07:14:16,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 07:14:16,736 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-04-16 07:14:16,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-16 07:14:16,736 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-04-16 07:14:16,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-16 07:14:16,737 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 07:14:16,737 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 07:14:16,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-04-16 07:14:16,737 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 07:14:16,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 07:14:16,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1930189671, now seen corresponding path program 1 times [2021-04-16 07:14:16,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 07:14:16,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1316551709] [2021-04-16 07:14:16,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 07:14:16,747 INFO L142 QuantifierPusher]: treesize reduction 8, result has 61.9 percent of original size [2021-04-16 07:14:16,748 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-04-16 07:14:16,748 INFO L175 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~x~0_20 v_main_~n~0_15) (= |v_main_#t~nondet4_19| 0)) InVars {main_#t~nondet4=|v_main_#t~nondet4_19|, main_~n~0=v_main_~n~0_15, main_~x~0=v_main_~x~0_20} OutVars{main_#t~nondet4=|v_main_#t~nondet4_19|, main_~n~0=v_main_~n~0_15, main_~x~0=v_main_~x~0_20} AuxVars[] AssignedVars[] [2021-04-16 07:14:16,753 WARN L240 tifierPushTermWalker]: treesize reduction 10, result has 86.8 percent of original size [2021-04-16 07:14:16,755 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:16,758 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:16,761 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:16,761 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-04-16 07:14:16,762 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:16,763 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:16,768 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:16,771 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:16,772 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-04-16 07:14:16,774 INFO L108 tifierPushTermWalker]: treesize reduction 2, result has 33.3 percent of original size [2021-04-16 07:14:16,776 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:16,776 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-04-16 07:14:16,778 INFO L108 tifierPushTermWalker]: treesize reduction 2, result has 33.3 percent of original size [2021-04-16 07:14:16,780 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:16,781 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:16,783 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:16,785 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:16,786 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:16,788 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:16,789 INFO L118 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:16,790 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:16,792 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:16,792 WARN L245 tifierPushTermWalker]: treesize reduction 10, result has 86.8 percent of original size 47 [2021-04-16 07:14:16,805 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:16,808 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-04-16 07:14:16,808 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-04-16 07:14:16,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 07:14:16,821 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:16,821 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:14:16,821 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:16,821 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 07:14:16,823 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:16,824 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 07:14:16,824 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:16,824 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-16 07:14:16,827 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:16,827 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-16 07:14:16,830 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:16,830 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:14:16,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 07:14:16,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 07:14:16,865 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:16,865 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:14:16,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-04-16 07:14:16,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 07:14:16,874 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:16,874 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:14:16,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-16 07:14:16,876 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:16,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-04-16 07:14:16,877 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:16,878 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 07:14:16,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-04-16 07:14:16,880 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:16,881 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-04-16 07:14:16,881 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 07:14:16,882 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:16,883 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-04-16 07:14:16,892 INFO L142 QuantifierPusher]: treesize reduction 8, result has 57.9 percent of original size [2021-04-16 07:14:16,894 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-04-16 07:14:16,903 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:16,907 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-04-16 07:14:16,917 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:16,918 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:14:16,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1316551709] [2021-04-16 07:14:16,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 07:14:16,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-04-16 07:14:16,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864334038] [2021-04-16 07:14:16,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-16 07:14:16,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 07:14:16,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-16 07:14:16,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-04-16 07:14:16,920 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-04-16 07:14:17,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 07:14:17,115 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2021-04-16 07:14:17,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-16 07:14:17,116 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2021-04-16 07:14:17,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 07:14:17,116 INFO L225 Difference]: With dead ends: 37 [2021-04-16 07:14:17,116 INFO L226 Difference]: Without dead ends: 27 [2021-04-16 07:14:17,117 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 177.8ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-04-16 07:14:17,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-04-16 07:14:17,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-04-16 07:14:17,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-04-16 07:14:17,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-04-16 07:14:17,121 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2021-04-16 07:14:17,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 07:14:17,121 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-04-16 07:14:17,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-04-16 07:14:17,121 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-04-16 07:14:17,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-16 07:14:17,121 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 07:14:17,121 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 07:14:17,121 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-04-16 07:14:17,121 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 07:14:17,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 07:14:17,122 INFO L82 PathProgramCache]: Analyzing trace with hash 987198129, now seen corresponding path program 1 times [2021-04-16 07:14:17,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 07:14:17,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016670663] [2021-04-16 07:14:17,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 07:14:17,125 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-04-16 07:14:17,126 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 07:14:17,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 07:14:17,149 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:17,149 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:14:17,149 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:17,150 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 07:14:17,153 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:17,153 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 07:14:17,157 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:17,157 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-16 07:14:17,161 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:17,161 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-16 07:14:17,165 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:17,166 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:14:17,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 07:14:17,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 07:14:17,185 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:17,185 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:14:17,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-04-16 07:14:17,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 07:14:17,190 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:17,190 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:14:17,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-16 07:14:17,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016670663] [2021-04-16 07:14:17,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 07:14:17,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-04-16 07:14:17,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003942461] [2021-04-16 07:14:17,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-16 07:14:17,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 07:14:17,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-16 07:14:17,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-04-16 07:14:17,193 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-04-16 07:14:17,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 07:14:17,338 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2021-04-16 07:14:17,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-16 07:14:17,338 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2021-04-16 07:14:17,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 07:14:17,339 INFO L225 Difference]: With dead ends: 44 [2021-04-16 07:14:17,339 INFO L226 Difference]: Without dead ends: 34 [2021-04-16 07:14:17,339 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-04-16 07:14:17,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-04-16 07:14:17,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2021-04-16 07:14:17,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-04-16 07:14:17,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2021-04-16 07:14:17,344 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 22 [2021-04-16 07:14:17,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 07:14:17,344 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2021-04-16 07:14:17,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-04-16 07:14:17,344 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2021-04-16 07:14:17,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-16 07:14:17,345 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 07:14:17,345 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 07:14:17,345 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-04-16 07:14:17,345 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 07:14:17,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 07:14:17,345 INFO L82 PathProgramCache]: Analyzing trace with hash -550830987, now seen corresponding path program 2 times [2021-04-16 07:14:17,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 07:14:17,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [244810613] [2021-04-16 07:14:17,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 07:14:17,349 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-04-16 07:14:17,350 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 07:14:17,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 07:14:17,362 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:17,362 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:14:17,362 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:17,363 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-04-16 07:14:17,365 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:17,365 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-04-16 07:14:17,368 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:17,368 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-16 07:14:17,371 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:17,371 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-16 07:14:17,375 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:17,375 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:14:17,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 07:14:17,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 07:14:17,392 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:17,392 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:14:17,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-04-16 07:14:17,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 07:14:17,394 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 07:14:17,395 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 07:14:17,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-16 07:14:17,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [244810613] [2021-04-16 07:14:17,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 07:14:17,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-04-16 07:14:17,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697900608] [2021-04-16 07:14:17,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-16 07:14:17,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 07:14:17,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-16 07:14:17,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-04-16 07:14:17,396 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-04-16 07:14:17,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 07:14:17,531 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2021-04-16 07:14:17,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-16 07:14:17,531 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2021-04-16 07:14:17,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 07:14:17,532 INFO L225 Difference]: With dead ends: 33 [2021-04-16 07:14:17,532 INFO L226 Difference]: Without dead ends: 0 [2021-04-16 07:14:17,532 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 116.3ms TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-04-16 07:14:17,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-04-16 07:14:17,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-04-16 07:14:17,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-16 07:14:17,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-04-16 07:14:17,533 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2021-04-16 07:14:17,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 07:14:17,533 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-04-16 07:14:17,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-04-16 07:14:17,533 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-04-16 07:14:17,533 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-04-16 07:14:17,533 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-04-16 07:14:17,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-04-16 07:14:18,014 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 20 [2021-04-16 07:14:18,257 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 23 [2021-04-16 07:14:18,279 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2021-04-16 07:14:18,279 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2021-04-16 07:14:18,279 INFO L198 CegarLoopUtils]: For program point L12-1(line 12) no Hoare annotation was computed. [2021-04-16 07:14:18,279 INFO L201 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2021-04-16 07:14:18,279 INFO L194 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)|)) [2021-04-16 07:14:18,279 INFO L201 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-04-16 07:14:18,279 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-04-16 07:14:18,279 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-04-16 07:14:18,279 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-04-16 07:14:18,279 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-04-16 07:14:18,279 INFO L198 CegarLoopUtils]: For program point L15(line 15) no Hoare annotation was computed. [2021-04-16 07:14:18,279 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2021-04-16 07:14:18,280 INFO L198 CegarLoopUtils]: For program point L15-2(lines 14 16) no Hoare annotation was computed. [2021-04-16 07:14:18,280 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2021-04-16 07:14:18,280 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 24 37) the Hoare annotation is: true [2021-04-16 07:14:18,280 INFO L194 CegarLoopUtils]: At program point L29(lines 29 31) the Hoare annotation is: (let ((.cse0 (<= 0 main_~m~0)) (.cse1 (<= (+ main_~m~0 1) main_~n~0))) (or (and .cse0 (<= 1 main_~x~0) .cse1 (<= (+ main_~x~0 1) main_~n~0)) (and .cse0 .cse1 (<= 0 (+ |main_#t~nondet4| 2147483648)) (<= |main_#t~nondet4| 2147483647) (= main_~x~0 0)))) [2021-04-16 07:14:18,280 INFO L194 CegarLoopUtils]: At program point L29-2(lines 29 31) the Hoare annotation is: (and (<= (+ main_~m~0 1) main_~n~0) (<= (+ main_~x~0 1) main_~n~0) (let ((.cse0 (or (<= 0 main_~m~0) (<= main_~n~0 0)))) (or (and .cse0 (= main_~x~0 0)) (and (<= 1 main_~x~0) .cse0)))) [2021-04-16 07:14:18,280 INFO L194 CegarLoopUtils]: At program point L28-2(lines 28 33) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse3 (<= (+ main_~m~0 1) main_~n~0)) (.cse1 (or (<= 0 main_~m~0) (<= main_~n~0 0))) (.cse2 (= main_~m~0 0)) (.cse4 (= main_~x~0 0))) (or (and .cse0 .cse1 .cse2) (and .cse0 .cse3 .cse1) (and .cse3 .cse1 .cse4) (and .cse1 .cse2 .cse4))) [2021-04-16 07:14:18,280 INFO L194 CegarLoopUtils]: At program point L28-3(lines 28 33) the Hoare annotation is: (let ((.cse2 (<= main_~n~0 0))) (let ((.cse0 (<= 1 main_~x~0)) (.cse1 (or (<= 0 main_~m~0) .cse2))) (or (and .cse0 .cse1 (= main_~m~0 0)) (and .cse2 (= main_~x~0 0)) (and .cse0 (<= (+ main_~m~0 1) main_~n~0) .cse1)))) [2021-04-16 07:14:18,280 INFO L201 CegarLoopUtils]: At program point mainEXIT(lines 24 37) the Hoare annotation is: true [2021-04-16 07:14:18,280 INFO L201 CegarLoopUtils]: At program point mainFINAL(lines 24 37) the Hoare annotation is: true [2021-04-16 07:14:18,280 INFO L201 CegarLoopUtils]: At program point L35(line 35) the Hoare annotation is: true [2021-04-16 07:14:18,280 INFO L194 CegarLoopUtils]: At program point L34(line 34) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0))) (or (and .cse0 (<= (+ main_~m~0 1) main_~n~0)) (and .cse0 (= main_~m~0 0)) (and (<= main_~n~0 0) (= main_~x~0 0)))) [2021-04-16 07:14:18,280 INFO L194 CegarLoopUtils]: At program point L18-2(lines 17 22) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-04-16 07:14:18,280 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2021-04-16 07:14:18,280 INFO L194 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 17 22) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-04-16 07:14:18,280 INFO L194 CegarLoopUtils]: At program point L19(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-04-16 07:14:18,281 INFO L194 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-04-16 07:14:18,281 INFO L194 CegarLoopUtils]: At program point L18(lines 18 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-04-16 07:14:18,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.04 07:14:18 BoogieIcfgContainer [2021-04-16 07:14:18,290 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-16 07:14:18,291 INFO L168 Benchmark]: Toolchain (without parser) took 4125.49 ms. Allocated memory was 235.9 MB in the beginning and 289.4 MB in the end (delta: 53.5 MB). Free memory was 202.3 MB in the beginning and 131.5 MB in the end (delta: 70.7 MB). Peak memory consumption was 152.8 MB. Max. memory is 8.0 GB. [2021-04-16 07:14:18,291 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 235.9 MB. Free memory is still 218.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-04-16 07:14:18,291 INFO L168 Benchmark]: CACSL2BoogieTranslator took 178.55 ms. Allocated memory is still 235.9 MB. Free memory was 202.0 MB in the beginning and 192.4 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-04-16 07:14:18,291 INFO L168 Benchmark]: Boogie Preprocessor took 57.89 ms. Allocated memory is still 235.9 MB. Free memory was 192.3 MB in the beginning and 219.3 MB in the end (delta: -27.0 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB. [2021-04-16 07:14:18,292 INFO L168 Benchmark]: RCFGBuilder took 271.61 ms. Allocated memory is still 235.9 MB. Free memory was 219.3 MB in the beginning and 205.3 MB in the end (delta: 14.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-04-16 07:14:18,292 INFO L168 Benchmark]: TraceAbstraction took 3611.39 ms. Allocated memory was 235.9 MB in the beginning and 289.4 MB in the end (delta: 53.5 MB). Free memory was 205.0 MB in the beginning and 131.5 MB in the end (delta: 73.4 MB). Peak memory consumption was 155.7 MB. Max. memory is 8.0 GB. [2021-04-16 07:14:18,293 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 235.9 MB. Free memory is still 218.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 178.55 ms. Allocated memory is still 235.9 MB. Free memory was 202.0 MB in the beginning and 192.4 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 57.89 ms. Allocated memory is still 235.9 MB. Free memory was 192.3 MB in the beginning and 219.3 MB in the end (delta: -27.0 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB. * RCFGBuilder took 271.61 ms. Allocated memory is still 235.9 MB. Free memory was 219.3 MB in the beginning and 205.3 MB in the end (delta: 14.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3611.39 ms. Allocated memory was 235.9 MB in the beginning and 289.4 MB in the end (delta: 53.5 MB). Free memory was 205.0 MB in the beginning and 131.5 MB in the end (delta: 73.4 MB). Peak memory consumption was 155.7 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2823.7ms, OverallIterations: 8, TraceHistogramMax: 2, EmptinessCheckTime: 9.8ms, AutomataDifference: 1429.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 744.8ms, InitialAbstractionConstructionTime: 6.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 113 SDtfs, 191 SDslu, 213 SDs, 0 SdLazy, 582 SolverSat, 96 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 358.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 126 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1206.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=7, InterpolantAutomatonStates: 66, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 50.5ms AutomataMinimizationTime, 8 MinimizatonAttempts, 46 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 22 LocationsWithAnnotation, 88 PreInvPairs, 151 NumberOfFragments, 261 HoareAnnotationTreeSize, 88 FomulaSimplifications, 13184 FormulaSimplificationTreeSizeReduction, 190.9ms HoareSimplificationTime, 22 FomulaSimplificationsInter, 4122 FormulaSimplificationTreeSizeReductionInter, 539.9ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: ((((1 <= x && (0 <= m || n <= 0)) && m == 0) || ((1 <= x && m + 1 <= n) && (0 <= m || n <= 0))) || ((m + 1 <= n && (0 <= m || n <= 0)) && x == 0)) || (((0 <= m || n <= 0) && m == 0) && x == 0) - 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: \old(cond) == 0 || !(cond == 0) RESULT: Ultimate proved your program to be correct! Received shutdown request...