/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 23:29:19,583 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 23:29:19,585 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 23:29:19,618 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 23:29:19,636 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 23:29:19,638 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 23:29:19,639 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 23:29:19,640 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 23:29:19,642 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 23:29:19,643 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 23:29:19,645 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 23:29:19,648 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 23:29:19,649 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 23:29:19,650 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 23:29:19,652 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 23:29:19,654 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 23:29:19,656 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 23:29:19,662 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 23:29:19,663 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 23:29:19,663 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 23:29:19,667 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-02 23:29:19,676 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 23:29:19,676 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 23:29:19,679 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 23:29:19,679 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 23:29:19,679 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 23:29:19,679 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 23:29:19,679 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 23:29:19,679 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 23:29:19,679 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 23:29:19,679 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 23:29:19,680 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 23:29:19,680 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 23:29:19,680 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 23:29:19,680 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 23:29:19,681 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 23:29:19,681 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 23:29:19,681 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 23:29:19,681 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 23:29:19,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:29:19,681 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 23:29:19,681 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-02 23:29:19,681 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 23:29:19,681 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-02 23:29:19,682 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 23:29:19,930 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 23:29:19,944 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 23:29:19,946 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 23:29:19,947 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 23:29:19,947 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 23:29:19,948 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c [2021-05-02 23:29:19,992 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1cbc8f72b/154915441b7b4ed5aad6aee6ca91fb40/FLAG8c03a076a [2021-05-02 23:29:20,350 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 23:29:20,351 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c [2021-05-02 23:29:20,355 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1cbc8f72b/154915441b7b4ed5aad6aee6ca91fb40/FLAG8c03a076a [2021-05-02 23:29:20,370 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1cbc8f72b/154915441b7b4ed5aad6aee6ca91fb40 [2021-05-02 23:29:20,373 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 23:29:20,375 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 23:29:20,376 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 23:29:20,376 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 23:29:20,379 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 23:29:20,380 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:29:20" (1/1) ... [2021-05-02 23:29:20,380 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13dca1db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:20, skipping insertion in model container [2021-05-02 23:29:20,380 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:29:20" (1/1) ... [2021-05-02 23:29:20,385 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 23:29:20,396 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 23:29:20,547 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c[327,340] [2021-05-02 23:29:20,555 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:29:20,562 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 23:29:20,592 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c[327,340] [2021-05-02 23:29:20,593 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:29:20,625 INFO L208 MainTranslator]: Completed translation [2021-05-02 23:29:20,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:20 WrapperNode [2021-05-02 23:29:20,626 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 23:29:20,627 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 23:29:20,627 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 23:29:20,628 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 23:29:20,651 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:20" (1/1) ... [2021-05-02 23:29:20,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:20" (1/1) ... [2021-05-02 23:29:20,656 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:20" (1/1) ... [2021-05-02 23:29:20,656 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:20" (1/1) ... [2021-05-02 23:29:20,660 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:20" (1/1) ... [2021-05-02 23:29:20,664 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:20" (1/1) ... [2021-05-02 23:29:20,669 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:20" (1/1) ... [2021-05-02 23:29:20,670 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 23:29:20,672 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 23:29:20,672 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 23:29:20,672 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 23:29:20,672 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:20" (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 [2021-05-02 23:29:20,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 23:29:20,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 23:29:20,730 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 23:29:20,731 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 23:29:20,731 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 23:29:20,731 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 23:29:20,731 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 23:29:20,731 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 23:29:20,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 23:29:20,732 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 23:29:20,732 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 23:29:20,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 23:29:20,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 23:29:20,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 23:29:20,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 23:29:20,733 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 23:29:20,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 23:29:20,895 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 23:29:20,895 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 23:29:20,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:29:20 BoogieIcfgContainer [2021-05-02 23:29:20,896 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 23:29:20,898 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 23:29:20,898 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 23:29:20,900 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 23:29:20,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 11:29:20" (1/3) ... [2021-05-02 23:29:20,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@791b2921 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:29:20, skipping insertion in model container [2021-05-02 23:29:20,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:29:20" (2/3) ... [2021-05-02 23:29:20,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@791b2921 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:29:20, skipping insertion in model container [2021-05-02 23:29:20,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:29:20" (3/3) ... [2021-05-02 23:29:20,902 INFO L111 eAbstractionObserver]: Analyzing ICFG underapprox_2-1.c [2021-05-02 23:29:20,905 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-02 23:29:20,907 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 23:29:20,929 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 23:29:20,942 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 23:29:20,942 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 23:29:20,942 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-02 23:29:20,942 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 23:29:20,942 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 23:29:20,942 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 23:29:20,942 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 23:29:20,942 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 23:29:20,951 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:29:20,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 23:29:20,955 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:20,955 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:20,955 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:20,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:20,959 INFO L82 PathProgramCache]: Analyzing trace with hash -219174432, now seen corresponding path program 1 times [2021-05-02 23:29:20,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:20,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361864321] [2021-05-02 23:29:20,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:21,001 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:21,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:21,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:21,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:21,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:29:21,137 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:21,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [361864321] [2021-05-02 23:29:21,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [361864321] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:21,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:21,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 23:29:21,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741721925] [2021-05-02 23:29:21,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 23:29:21,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:21,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 23:29:21,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:29:21,152 INFO L87 Difference]: Start difference. First operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) 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) [2021-05-02 23:29:21,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:21,187 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-05-02 23:29:21,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 23:29:21,188 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 [2021-05-02 23:29:21,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:21,192 INFO L225 Difference]: With dead ends: 29 [2021-05-02 23:29:21,192 INFO L226 Difference]: Without dead ends: 12 [2021-05-02 23:29:21,194 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:29:21,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-05-02 23:29:21,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-05-02 23:29:21,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 3 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) [2021-05-02 23:29:21,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2021-05-02 23:29:21,265 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 11 [2021-05-02 23:29:21,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:21,265 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2021-05-02 23:29:21,265 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) [2021-05-02 23:29:21,266 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2021-05-02 23:29:21,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 23:29:21,267 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:21,267 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:21,267 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 23:29:21,267 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:21,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:21,269 INFO L82 PathProgramCache]: Analyzing trace with hash -222868516, now seen corresponding path program 1 times [2021-05-02 23:29:21,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:21,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395268811] [2021-05-02 23:29:21,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:21,277 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:21,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:21,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:21,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:21,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:29:21,434 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:21,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395268811] [2021-05-02 23:29:21,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [395268811] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:21,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:21,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 23:29:21,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51673164] [2021-05-02 23:29:21,435 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 23:29:21,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:21,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 23:29:21,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 23:29:21,436 INFO L87 Difference]: Start difference. First operand 12 states and 12 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) [2021-05-02 23:29:21,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:21,500 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2021-05-02 23:29:21,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 23:29:21,501 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 [2021-05-02 23:29:21,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:21,501 INFO L225 Difference]: With dead ends: 18 [2021-05-02 23:29:21,502 INFO L226 Difference]: Without dead ends: 13 [2021-05-02 23:29:21,503 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 64.8ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-02 23:29:21,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-05-02 23:29:21,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-05-02 23:29:21,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 3 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) [2021-05-02 23:29:21,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-05-02 23:29:21,512 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2021-05-02 23:29:21,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:21,512 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-05-02 23:29:21,512 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) [2021-05-02 23:29:21,512 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-05-02 23:29:21,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 23:29:21,513 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:21,513 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:21,513 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 23:29:21,513 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:21,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:21,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1717471862, now seen corresponding path program 1 times [2021-05-02 23:29:21,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:21,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367966374] [2021-05-02 23:29:21,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:21,531 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2021-05-02 23:29:21,534 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:21,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:21,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:21,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:21,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:29:21,675 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:21,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367966374] [2021-05-02 23:29:21,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [367966374] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:21,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:21,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 23:29:21,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46644707] [2021-05-02 23:29:21,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 23:29:21,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:21,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 23:29:21,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 23:29:21,677 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 5 states have internal predecessors, (8), 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) [2021-05-02 23:29:21,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:21,765 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2021-05-02 23:29:21,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 23:29:21,766 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 5 states have internal predecessors, (8), 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 12 [2021-05-02 23:29:21,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:21,766 INFO L225 Difference]: With dead ends: 19 [2021-05-02 23:29:21,766 INFO L226 Difference]: Without dead ends: 14 [2021-05-02 23:29:21,768 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.9ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:29:21,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-05-02 23:29:21,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-05-02 23:29:21,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 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) [2021-05-02 23:29:21,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-05-02 23:29:21,778 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2021-05-02 23:29:21,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:21,779 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-05-02 23:29:21,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 5 states have internal predecessors, (8), 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) [2021-05-02 23:29:21,779 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-05-02 23:29:21,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-02 23:29:21,779 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:21,779 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:21,779 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 23:29:21,780 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:21,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:21,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1738481436, now seen corresponding path program 2 times [2021-05-02 23:29:21,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:21,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69617621] [2021-05-02 23:29:21,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:21,786 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2021-05-02 23:29:21,787 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:21,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:21,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:21,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:21,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:29:21,982 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:21,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69617621] [2021-05-02 23:29:21,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [69617621] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:21,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:21,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 23:29:21,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732683776] [2021-05-02 23:29:21,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 23:29:21,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:21,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 23:29:21,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 23:29:21,984 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 8 states, 8 states have (on average 1.125) internal successors, (9), 6 states have internal predecessors, (9), 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) [2021-05-02 23:29:22,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:22,111 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2021-05-02 23:29:22,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 23:29:22,112 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.125) internal successors, (9), 6 states have internal predecessors, (9), 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 13 [2021-05-02 23:29:22,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:22,113 INFO L225 Difference]: With dead ends: 20 [2021-05-02 23:29:22,113 INFO L226 Difference]: Without dead ends: 15 [2021-05-02 23:29:22,114 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 156.9ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-02 23:29:22,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-05-02 23:29:22,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-05-02 23:29:22,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 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) [2021-05-02 23:29:22,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-05-02 23:29:22,132 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2021-05-02 23:29:22,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:22,133 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-05-02 23:29:22,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.125) internal successors, (9), 6 states have internal predecessors, (9), 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) [2021-05-02 23:29:22,133 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-05-02 23:29:22,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 23:29:22,134 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:22,134 INFO L523 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:22,134 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 23:29:22,135 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:22,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:22,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1905189066, now seen corresponding path program 3 times [2021-05-02 23:29:22,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:22,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1021024593] [2021-05-02 23:29:22,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:22,139 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2021-05-02 23:29:22,140 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:22,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:22,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:22,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:22,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:29:22,271 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:22,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1021024593] [2021-05-02 23:29:22,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1021024593] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:22,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:22,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 23:29:22,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282866832] [2021-05-02 23:29:22,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 23:29:22,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:22,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 23:29:22,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:29:22,273 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 9 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 7 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) [2021-05-02 23:29:22,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:22,395 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2021-05-02 23:29:22,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 23:29:22,396 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 7 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 [2021-05-02 23:29:22,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:22,397 INFO L225 Difference]: With dead ends: 21 [2021-05-02 23:29:22,397 INFO L226 Difference]: Without dead ends: 16 [2021-05-02 23:29:22,398 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 127.6ms TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:29:22,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-05-02 23:29:22,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-05-02 23:29:22,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 3 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) [2021-05-02 23:29:22,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-05-02 23:29:22,403 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2021-05-02 23:29:22,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:22,404 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-05-02 23:29:22,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 7 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) [2021-05-02 23:29:22,404 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-05-02 23:29:22,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 23:29:22,404 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:22,405 INFO L523 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:22,405 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-02 23:29:22,405 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:22,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:22,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1105142364, now seen corresponding path program 4 times [2021-05-02 23:29:22,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:22,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120949993] [2021-05-02 23:29:22,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:22,411 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2021-05-02 23:29:22,412 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:22,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:22,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:22,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:22,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:29:22,558 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:22,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120949993] [2021-05-02 23:29:22,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [120949993] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:22,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:22,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-02 23:29:22,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918805657] [2021-05-02 23:29:22,559 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 23:29:22,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:22,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 23:29:22,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:29:22,560 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 10 states, 10 states have (on average 1.1) internal successors, (11), 8 states have internal predecessors, (11), 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) [2021-05-02 23:29:22,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:22,743 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-05-02 23:29:22,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 23:29:22,744 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.1) internal successors, (11), 8 states have internal predecessors, (11), 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 15 [2021-05-02 23:29:22,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:22,744 INFO L225 Difference]: With dead ends: 22 [2021-05-02 23:29:22,744 INFO L226 Difference]: Without dead ends: 17 [2021-05-02 23:29:22,745 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 199.3ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:29:22,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-02 23:29:22,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-02 23:29:22,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 3 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) [2021-05-02 23:29:22,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-05-02 23:29:22,752 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2021-05-02 23:29:22,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:22,752 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-05-02 23:29:22,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.1) internal successors, (11), 8 states have internal predecessors, (11), 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) [2021-05-02 23:29:22,753 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-05-02 23:29:22,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-02 23:29:22,753 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:22,753 INFO L523 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:22,754 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-02 23:29:22,754 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:22,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:22,754 INFO L82 PathProgramCache]: Analyzing trace with hash -63863818, now seen corresponding path program 5 times [2021-05-02 23:29:22,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:22,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [434602238] [2021-05-02 23:29:22,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:22,758 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2021-05-02 23:29:22,759 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:22,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:22,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:29:22,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:29:22,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:29:22,891 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:29:22,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [434602238] [2021-05-02 23:29:22,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [434602238] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:29:22,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:29:22,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-02 23:29:22,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573244052] [2021-05-02 23:29:22,891 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 23:29:22,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:29:22,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 23:29:22,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-02 23:29:22,892 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 11 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 9 states have internal predecessors, (12), 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) [2021-05-02 23:29:23,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:29:23,120 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2021-05-02 23:29:23,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 23:29:23,120 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 9 states have internal predecessors, (12), 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 16 [2021-05-02 23:29:23,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:29:23,121 INFO L225 Difference]: With dead ends: 23 [2021-05-02 23:29:23,121 INFO L226 Difference]: Without dead ends: 18 [2021-05-02 23:29:23,121 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 233.9ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:29:23,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-02 23:29:23,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-05-02 23:29:23,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 3 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) [2021-05-02 23:29:23,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2021-05-02 23:29:23,125 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2021-05-02 23:29:23,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:29:23,125 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2021-05-02 23:29:23,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 9 states have internal predecessors, (12), 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) [2021-05-02 23:29:23,125 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2021-05-02 23:29:23,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 23:29:23,126 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:29:23,126 INFO L523 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:29:23,126 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-02 23:29:23,126 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:29:23,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:29:23,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1943317092, now seen corresponding path program 6 times [2021-05-02 23:29:23,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:29:23,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2400343] [2021-05-02 23:29:23,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:29:23,129 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2021-05-02 23:29:23,131 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:29:23,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 23:29:23,139 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 23:29:23,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 23:29:23,148 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 23:29:23,183 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-05-02 23:29:23,183 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 23:29:23,183 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-02 23:29:23,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 11:29:23 BoogieIcfgContainer [2021-05-02 23:29:23,194 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 23:29:23,197 INFO L168 Benchmark]: Toolchain (without parser) took 2822.42 ms. Allocated memory is still 232.8 MB. Free memory was 197.3 MB in the beginning and 165.9 MB in the end (delta: 31.3 MB). Peak memory consumption was 32.0 MB. Max. memory is 8.0 GB. [2021-05-02 23:29:23,198 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 232.8 MB. Free memory is still 213.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 23:29:23,198 INFO L168 Benchmark]: CACSL2BoogieTranslator took 250.09 ms. Allocated memory is still 232.8 MB. Free memory was 197.1 MB in the beginning and 215.9 MB in the end (delta: -18.8 MB). Peak memory consumption was 10.9 MB. Max. memory is 8.0 GB. [2021-05-02 23:29:23,198 INFO L168 Benchmark]: Boogie Preprocessor took 43.46 ms. Allocated memory is still 232.8 MB. Free memory was 215.9 MB in the beginning and 214.8 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 23:29:23,199 INFO L168 Benchmark]: RCFGBuilder took 224.80 ms. Allocated memory is still 232.8 MB. Free memory was 214.8 MB in the beginning and 201.2 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 23:29:23,199 INFO L168 Benchmark]: TraceAbstraction took 2296.31 ms. Allocated memory is still 232.8 MB. Free memory was 200.7 MB in the beginning and 165.9 MB in the end (delta: 34.7 MB). Peak memory consumption was 35.8 MB. Max. memory is 8.0 GB. [2021-05-02 23:29:23,200 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 232.8 MB. Free memory is still 213.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 250.09 ms. Allocated memory is still 232.8 MB. Free memory was 197.1 MB in the beginning and 215.9 MB in the end (delta: -18.8 MB). Peak memory consumption was 10.9 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 43.46 ms. Allocated memory is still 232.8 MB. Free memory was 215.9 MB in the beginning and 214.8 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 8.0 GB. * RCFGBuilder took 224.80 ms. Allocated memory is still 232.8 MB. Free memory was 214.8 MB in the beginning and 201.2 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2296.31 ms. Allocated memory is still 232.8 MB. Free memory was 200.7 MB in the beginning and 165.9 MB in the end (delta: 34.7 MB). Peak memory consumption was 35.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L13] unsigned int x = 0; [L14] unsigned int y = 1; [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 [L16] COND FALSE !(x < 6) [L21] CALL __VERIFIER_assert(x != 6) [L6] COND TRUE !(cond) [L7] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2243.3ms, OverallIterations: 8, TraceHistogramMax: 6, EmptinessCheckTime: 10.0ms, AutomataDifference: 880.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 76 SDtfs, 45 SDslu, 174 SDs, 0 SdLazy, 308 SolverSat, 50 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 217.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 88 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 920.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, InterpolantAutomatonStates: 42, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 79.3ms AutomataMinimizationTime, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, 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 RESULT: Ultimate proved your program to be incorrect! Received shutdown request...