/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/sumt8.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 19:01:46,897 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 19:01:46,898 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 19:01:46,924 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 19:01:46,953 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 19:01:46,954 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 19:01:46,954 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 19:01:46,961 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 19:01:46,973 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 19:01:46,973 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 19:01:46,975 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 19:01:46,975 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 19:01:46,975 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 19:01:46,976 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 19:01:46,976 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 19:01:46,976 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 19:01:46,976 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 19:01:46,976 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 19:01:46,984 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 19:01:46,985 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 19:01:46,985 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 19:01:46,985 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 19:01:46,985 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 19:01:46,985 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 19:01:46,985 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 19:01:46,985 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 19:01:46,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:01:46,985 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 19:01:46,986 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 19:01:46,986 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 19:01:46,986 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 19:01:47,220 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 19:01:47,241 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 19:01:47,242 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 19:01:47,243 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 19:01:47,244 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 19:01:47,245 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt8.c [2021-05-02 19:01:47,297 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d448e36a8/69c6ee09d8ec4a999eb197b80a2c6f70/FLAGf1732061b [2021-05-02 19:01:47,668 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 19:01:47,669 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt8.c [2021-05-02 19:01:47,673 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d448e36a8/69c6ee09d8ec4a999eb197b80a2c6f70/FLAGf1732061b [2021-05-02 19:01:48,083 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d448e36a8/69c6ee09d8ec4a999eb197b80a2c6f70 [2021-05-02 19:01:48,085 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 19:01:48,086 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 19:01:48,087 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 19:01:48,087 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 19:01:48,091 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 19:01:48,092 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:01:48" (1/1) ... [2021-05-02 19:01:48,093 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24b23962 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:01:48, skipping insertion in model container [2021-05-02 19:01:48,093 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:01:48" (1/1) ... [2021-05-02 19:01:48,097 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 19:01:48,108 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 19:01:48,198 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt8.c[403,416] [2021-05-02 19:01:48,209 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:01:48,214 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 19:01:48,221 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt8.c[403,416] [2021-05-02 19:01:48,227 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:01:48,263 INFO L208 MainTranslator]: Completed translation [2021-05-02 19:01:48,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:01:48 WrapperNode [2021-05-02 19:01:48,263 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 19:01:48,264 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 19:01:48,264 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 19:01:48,264 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 19:01:48,283 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:01:48" (1/1) ... [2021-05-02 19:01:48,283 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:01:48" (1/1) ... [2021-05-02 19:01:48,299 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:01:48" (1/1) ... [2021-05-02 19:01:48,300 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:01:48" (1/1) ... [2021-05-02 19:01:48,304 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:01:48" (1/1) ... [2021-05-02 19:01:48,306 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:01:48" (1/1) ... [2021-05-02 19:01:48,307 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:01:48" (1/1) ... [2021-05-02 19:01:48,308 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 19:01:48,309 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 19:01:48,309 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 19:01:48,309 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 19:01:48,309 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:01:48" (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 19:01:48,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 19:01:48,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 19:01:48,380 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 19:01:48,380 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 19:01:48,380 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 19:01:48,381 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 19:01:48,381 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 19:01:48,381 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 19:01:48,381 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 19:01:48,381 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 19:01:48,382 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 19:01:48,382 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 19:01:48,382 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 19:01:48,382 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 19:01:48,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 19:01:48,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 19:01:48,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 19:01:48,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 19:01:48,383 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 19:01:48,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 19:01:48,628 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 19:01:48,629 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 19:01:48,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:01:48 BoogieIcfgContainer [2021-05-02 19:01:48,630 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 19:01:48,630 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 19:01:48,630 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 19:01:48,631 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 19:01:48,633 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:01:48" (1/1) ... [2021-05-02 19:01:48,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:01:48 BasicIcfg [2021-05-02 19:01:48,648 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 19:01:48,649 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 19:01:48,649 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 19:01:48,651 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 19:01:48,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 07:01:48" (1/4) ... [2021-05-02 19:01:48,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5706c303 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:01:48, skipping insertion in model container [2021-05-02 19:01:48,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:01:48" (2/4) ... [2021-05-02 19:01:48,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5706c303 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:01:48, skipping insertion in model container [2021-05-02 19:01:48,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:01:48" (3/4) ... [2021-05-02 19:01:48,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5706c303 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:01:48, skipping insertion in model container [2021-05-02 19:01:48,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:01:48" (4/4) ... [2021-05-02 19:01:48,653 INFO L111 eAbstractionObserver]: Analyzing ICFG sumt8.cJordan [2021-05-02 19:01:48,657 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 19:01:48,659 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 19:01:48,669 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 19:01:48,682 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 19:01:48,682 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 19:01:48,682 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 19:01:48,682 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 19:01:48,682 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 19:01:48,682 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 19:01:48,682 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 19:01:48,683 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 19:01:48,697 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 20 states have (on average 1.6) internal successors, (32), 22 states have internal predecessors, (32), 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 19:01:48,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 19:01:48,702 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:01:48,702 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:01:48,702 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:01:48,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:01:48,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1416405871, now seen corresponding path program 1 times [2021-05-02 19:01:48,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:01:48,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606644340] [2021-05-02 19:01:48,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:01:48,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:01:49,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:01:49,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:01:49,171 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 19:01:49,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:01:49,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606644340] [2021-05-02 19:01:49,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606644340] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:01:49,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:01:49,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 19:01:49,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945480245] [2021-05-02 19:01:49,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:01:49,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:01:49,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:01:49,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:01:49,185 INFO L87 Difference]: Start difference. First operand has 28 states, 20 states have (on average 1.6) internal successors, (32), 22 states have internal predecessors, (32), 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 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 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 19:01:49,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:01:49,650 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2021-05-02 19:01:49,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:01:49,651 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 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 19:01:49,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:01:49,657 INFO L225 Difference]: With dead ends: 50 [2021-05-02 19:01:49,657 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 19:01:49,658 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 429.4ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-05-02 19:01:49,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 19:01:49,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2021-05-02 19:01:49,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 24 states have internal predecessors, (31), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 19:01:49,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2021-05-02 19:01:49,679 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 14 [2021-05-02 19:01:49,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:01:49,680 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2021-05-02 19:01:49,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 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 19:01:49,680 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2021-05-02 19:01:49,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 19:01:49,681 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:01:49,681 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:01:49,681 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 19:01:49,681 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:01:49,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:01:49,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1765150623, now seen corresponding path program 1 times [2021-05-02 19:01:49,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:01:49,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442590536] [2021-05-02 19:01:49,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:01:49,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:01:49,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:01:49,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:01:49,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-02 19:01:49,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:01:49,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:01:49,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:01:49,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442590536] [2021-05-02 19:01:49,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442590536] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:01:49,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555367882] [2021-05-02 19:01:49,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:01:49,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:01:49,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 19:01:49,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:01:50,084 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:01:50,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555367882] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:01:50,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 19:01:50,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11] total 14 [2021-05-02 19:01:50,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277620312] [2021-05-02 19:01:50,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 19:01:50,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:01:50,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 19:01:50,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-02 19:01:50,089 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 19:01:50,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:01:50,552 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2021-05-02 19:01:50,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 19:01:50,553 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 22 [2021-05-02 19:01:50,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:01:50,554 INFO L225 Difference]: With dead ends: 40 [2021-05-02 19:01:50,555 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 19:01:50,555 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 415.3ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-05-02 19:01:50,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 19:01:50,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-05-02 19:01:50,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 19:01:50,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2021-05-02 19:01:50,565 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 22 [2021-05-02 19:01:50,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:01:50,566 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2021-05-02 19:01:50,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 19:01:50,567 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2021-05-02 19:01:50,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 19:01:50,568 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:01:50,569 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:01:50,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 19:01:50,792 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:01:50,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:01:50,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1535798793, now seen corresponding path program 1 times [2021-05-02 19:01:50,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:01:50,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350428975] [2021-05-02 19:01:50,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:01:50,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:01:51,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:01:51,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:01:51,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-02 19:01:51,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:01:51,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:01:51,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:01:51,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350428975] [2021-05-02 19:01:51,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350428975] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:01:51,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8926377] [2021-05-02 19:01:51,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:01:51,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:01:51,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 19:01:51,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:01:51,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:51,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:51,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:51,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:51,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:51,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:01:51,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8926377] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:01:51,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 19:01:51,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-05-02 19:01:51,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917109787] [2021-05-02 19:01:51,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 19:01:51,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:01:51,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 19:01:51,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-02 19:01:51,432 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 16 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 19:01:52,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:01:52,012 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2021-05-02 19:01:52,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 19:01:52,012 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-02 19:01:52,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:01:52,013 INFO L225 Difference]: With dead ends: 53 [2021-05-02 19:01:52,013 INFO L226 Difference]: Without dead ends: 53 [2021-05-02 19:01:52,014 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 602.5ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-05-02 19:01:52,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-02 19:01:52,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-05-02 19:01:52,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 43 states have (on average 1.186046511627907) internal successors, (51), 43 states have internal predecessors, (51), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 19:01:52,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2021-05-02 19:01:52,017 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 28 [2021-05-02 19:01:52,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:01:52,018 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2021-05-02 19:01:52,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 19:01:52,018 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2021-05-02 19:01:52,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 19:01:52,019 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:01:52,019 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:01:52,230 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:01:52,230 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:01:52,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:01:52,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1567718338, now seen corresponding path program 1 times [2021-05-02 19:01:52,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:01:52,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028180925] [2021-05-02 19:01:52,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:01:52,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:01:52,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:01:52,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:01:52,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-02 19:01:52,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:01:52,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-02 19:01:52,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:01:52,500 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 19:01:52,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:01:52,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028180925] [2021-05-02 19:01:52,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028180925] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:01:52,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642638625] [2021-05-02 19:01:52,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:01:52,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:01:52,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 19:01:52,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:01:52,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:52,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:52,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:52,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:52,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:52,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:52,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:52,850 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 19:01:52,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642638625] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:01:52,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 19:01:52,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-05-02 19:01:52,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31199552] [2021-05-02 19:01:52,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 19:01:52,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:01:52,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 19:01:52,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-05-02 19:01:52,854 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 20 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 7 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 19:01:53,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:01:53,577 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2021-05-02 19:01:53,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 19:01:53,578 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 7 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 42 [2021-05-02 19:01:53,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:01:53,579 INFO L225 Difference]: With dead ends: 66 [2021-05-02 19:01:53,579 INFO L226 Difference]: Without dead ends: 66 [2021-05-02 19:01:53,579 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 701.4ms TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-05-02 19:01:53,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-05-02 19:01:53,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-05-02 19:01:53,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 54 states have internal predecessors, (62), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 19:01:53,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2021-05-02 19:01:53,584 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 42 [2021-05-02 19:01:53,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:01:53,584 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2021-05-02 19:01:53,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 7 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 19:01:53,584 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2021-05-02 19:01:53,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 19:01:53,585 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:01:53,585 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:01:53,801 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:01:53,801 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:01:53,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:01:53,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1953464640, now seen corresponding path program 1 times [2021-05-02 19:01:53,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:01:53,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956610393] [2021-05-02 19:01:53,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:01:53,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:01:54,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:01:54,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:01:54,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-02 19:01:54,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:01:54,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-02 19:01:54,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:01:54,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-05-02 19:01:54,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:01:54,187 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 40 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 19:01:54,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:01:54,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956610393] [2021-05-02 19:01:54,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956610393] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:01:54,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4216055] [2021-05-02 19:01:54,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:01:54,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:01:54,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 19:01:54,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:01:54,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:54,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:54,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:54,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:54,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:54,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:54,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:54,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:54,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:54,577 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 5 proven. 47 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 19:01:54,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4216055] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:01:54,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 19:01:54,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2021-05-02 19:01:54,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103125763] [2021-05-02 19:01:54,578 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 19:01:54,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:01:54,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 19:01:54,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-05-02 19:01:54,579 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand has 24 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 9 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 19:01:55,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:01:55,518 INFO L93 Difference]: Finished difference Result 78 states and 85 transitions. [2021-05-02 19:01:55,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 19:01:55,519 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 9 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 55 [2021-05-02 19:01:55,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:01:55,520 INFO L225 Difference]: With dead ends: 78 [2021-05-02 19:01:55,520 INFO L226 Difference]: Without dead ends: 78 [2021-05-02 19:01:55,521 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 919.7ms TimeCoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 19:01:55,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-02 19:01:55,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-05-02 19:01:55,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 64 states have (on average 1.125) internal successors, (72), 64 states have internal predecessors, (72), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 19:01:55,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2021-05-02 19:01:55,526 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 55 [2021-05-02 19:01:55,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:01:55,527 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2021-05-02 19:01:55,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 9 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 19:01:55,527 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2021-05-02 19:01:55,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-02 19:01:55,528 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:01:55,528 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:01:55,744 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:01:55,745 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:01:55,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:01:55,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1984322537, now seen corresponding path program 1 times [2021-05-02 19:01:55,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:01:55,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709103132] [2021-05-02 19:01:55,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:01:55,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:01:56,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:01:56,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:01:56,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-02 19:01:56,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:01:56,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-02 19:01:56,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:01:56,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-05-02 19:01:56,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:01:56,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-05-02 19:01:56,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:01:56,153 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 8 proven. 68 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 19:01:56,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:01:56,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709103132] [2021-05-02 19:01:56,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709103132] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:01:56,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025315668] [2021-05-02 19:01:56,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:01:56,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:01:56,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-02 19:01:56,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:01:56,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:56,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:56,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:56,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:56,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:56,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:56,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:56,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:56,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:56,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:56,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:56,673 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 7 proven. 78 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 19:01:56,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025315668] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:01:56,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 19:01:56,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-05-02 19:01:56,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031981892] [2021-05-02 19:01:56,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 19:01:56,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:01:56,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 19:01:56,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-05-02 19:01:56,674 INFO L87 Difference]: Start difference. First operand 78 states and 85 transitions. Second operand has 28 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 26 states have internal predecessors, (86), 11 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 19:01:57,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:01:57,886 INFO L93 Difference]: Finished difference Result 89 states and 96 transitions. [2021-05-02 19:01:57,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 19:01:57,886 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 26 states have internal predecessors, (86), 11 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 67 [2021-05-02 19:01:57,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:01:57,888 INFO L225 Difference]: With dead ends: 89 [2021-05-02 19:01:57,888 INFO L226 Difference]: Without dead ends: 89 [2021-05-02 19:01:57,890 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 1094.9ms TimeCoverageRelationStatistics Valid=210, Invalid=1596, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 19:01:57,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-02 19:01:57,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-05-02 19:01:57,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 73 states have internal predecessors, (81), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 19:01:57,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 96 transitions. [2021-05-02 19:01:57,895 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 96 transitions. Word has length 67 [2021-05-02 19:01:57,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:01:57,896 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 96 transitions. [2021-05-02 19:01:57,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 26 states have internal predecessors, (86), 11 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 19:01:57,896 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 96 transitions. [2021-05-02 19:01:57,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-02 19:01:57,897 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:01:57,897 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:01:58,097 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:01:58,097 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:01:58,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:01:58,098 INFO L82 PathProgramCache]: Analyzing trace with hash -809826982, now seen corresponding path program 1 times [2021-05-02 19:01:58,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:01:58,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414863754] [2021-05-02 19:01:58,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:01:58,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:01:58,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:01:58,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:01:58,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-02 19:01:58,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:01:58,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-02 19:01:58,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:01:58,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-05-02 19:01:58,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:01:58,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-05-02 19:01:58,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:01:58,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-05-02 19:01:58,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:01:58,473 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 19:01:58,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:01:58,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414863754] [2021-05-02 19:01:58,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414863754] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:01:58,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873044804] [2021-05-02 19:01:58,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:01:58,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:01:58,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-02 19:01:58,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:01:58,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:58,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:58,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:58,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:58,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:58,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:58,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:58,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:58,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:58,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:59,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:59,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:59,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:01:59,092 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 9 proven. 113 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 19:01:59,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873044804] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:01:59,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 19:01:59,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 32 [2021-05-02 19:01:59,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689799945] [2021-05-02 19:01:59,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 19:01:59,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:01:59,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 19:01:59,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2021-05-02 19:01:59,094 INFO L87 Difference]: Start difference. First operand 89 states and 96 transitions. Second operand has 32 states, 30 states have (on average 3.2666666666666666) internal successors, (98), 30 states have internal predecessors, (98), 13 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 19:02:00,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:02:00,189 INFO L93 Difference]: Finished difference Result 99 states and 106 transitions. [2021-05-02 19:02:00,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 19:02:00,189 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 3.2666666666666666) internal successors, (98), 30 states have internal predecessors, (98), 13 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 78 [2021-05-02 19:02:00,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:02:00,190 INFO L225 Difference]: With dead ends: 99 [2021-05-02 19:02:00,191 INFO L226 Difference]: Without dead ends: 99 [2021-05-02 19:02:00,191 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 1281.0ms TimeCoverageRelationStatistics Valid=261, Invalid=2091, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 19:02:00,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-02 19:02:00,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-05-02 19:02:00,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 81 states have (on average 1.0987654320987654) internal successors, (89), 81 states have internal predecessors, (89), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 19:02:00,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 106 transitions. [2021-05-02 19:02:00,195 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 106 transitions. Word has length 78 [2021-05-02 19:02:00,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:02:00,196 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 106 transitions. [2021-05-02 19:02:00,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 30 states have (on average 3.2666666666666666) internal successors, (98), 30 states have internal predecessors, (98), 13 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 19:02:00,196 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 106 transitions. [2021-05-02 19:02:00,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-05-02 19:02:00,197 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:02:00,197 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:02:00,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:02:00,415 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:02:00,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:02:00,416 INFO L82 PathProgramCache]: Analyzing trace with hash 996181575, now seen corresponding path program 1 times [2021-05-02 19:02:00,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:02:00,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031059697] [2021-05-02 19:02:00,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:02:00,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:02:00,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:02:00,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:02:00,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-02 19:02:00,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:02:00,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-02 19:02:00,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:02:00,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-05-02 19:02:00,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:02:00,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-05-02 19:02:00,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:02:00,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-05-02 19:02:00,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:02:00,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-05-02 19:02:00,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:02:00,893 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 12 proven. 134 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 19:02:00,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:02:00,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031059697] [2021-05-02 19:02:00,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031059697] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:02:00,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510971218] [2021-05-02 19:02:00,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:02:00,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:02:00,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-02 19:02:00,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:02:00,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:00,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:01,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:01,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:01,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:01,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:01,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:01,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:01,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:01,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:01,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:01,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:01,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:01,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:01,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:01,604 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 11 proven. 150 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-02 19:02:01,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510971218] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:02:01,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 19:02:01,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-05-02 19:02:01,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857841354] [2021-05-02 19:02:01,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 19:02:01,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:02:01,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 19:02:01,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1091, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 19:02:01,606 INFO L87 Difference]: Start difference. First operand 99 states and 106 transitions. Second operand has 36 states, 34 states have (on average 3.176470588235294) internal successors, (108), 34 states have internal predecessors, (108), 15 states have call successors, (17), 4 states have call predecessors, (17), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 19:02:02,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:02:02,919 INFO L93 Difference]: Finished difference Result 108 states and 115 transitions. [2021-05-02 19:02:02,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 19:02:02,919 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 3.176470588235294) internal successors, (108), 34 states have internal predecessors, (108), 15 states have call successors, (17), 4 states have call predecessors, (17), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 88 [2021-05-02 19:02:02,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:02:02,920 INFO L225 Difference]: With dead ends: 108 [2021-05-02 19:02:02,920 INFO L226 Difference]: Without dead ends: 108 [2021-05-02 19:02:02,921 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 1512.9ms TimeCoverageRelationStatistics Valid=318, Invalid=2652, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 19:02:02,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-02 19:02:02,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-05-02 19:02:02,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 88 states have (on average 1.0909090909090908) internal successors, (96), 88 states have internal predecessors, (96), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 19:02:02,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 115 transitions. [2021-05-02 19:02:02,927 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 115 transitions. Word has length 88 [2021-05-02 19:02:02,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:02:02,928 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 115 transitions. [2021-05-02 19:02:02,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 34 states have (on average 3.176470588235294) internal successors, (108), 34 states have internal predecessors, (108), 15 states have call successors, (17), 4 states have call predecessors, (17), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 19:02:02,928 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 115 transitions. [2021-05-02 19:02:02,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 19:02:02,929 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:02:02,929 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:02:03,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:02:03,145 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:02:03,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:02:03,145 INFO L82 PathProgramCache]: Analyzing trace with hash -821369921, now seen corresponding path program 1 times [2021-05-02 19:02:03,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:02:03,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740702116] [2021-05-02 19:02:03,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:02:03,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:02:03,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:02:03,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:02:03,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-02 19:02:03,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:02:03,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-02 19:02:03,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:02:03,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-05-02 19:02:03,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:02:03,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-05-02 19:02:03,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:02:03,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-05-02 19:02:03,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:02:03,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-05-02 19:02:03,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:02:03,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-05-02 19:02:03,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:02:03,685 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 14 proven. 168 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-05-02 19:02:03,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:02:03,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740702116] [2021-05-02 19:02:03,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740702116] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:02:03,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321114446] [2021-05-02 19:02:03,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:02:03,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:02:03,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 61 conjunts are in the unsatisfiable core [2021-05-02 19:02:03,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:02:03,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:03,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:03,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:03,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:04,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:04,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:04,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:04,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:04,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:04,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:04,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:04,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:04,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:04,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:04,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:04,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:04,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:04,491 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 13 proven. 187 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-02 19:02:04,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321114446] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:02:04,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 19:02:04,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 40 [2021-05-02 19:02:04,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537692814] [2021-05-02 19:02:04,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-02 19:02:04,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:02:04,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-02 19:02:04,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1353, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 19:02:04,493 INFO L87 Difference]: Start difference. First operand 108 states and 115 transitions. Second operand has 40 states, 38 states have (on average 3.0526315789473686) internal successors, (116), 38 states have internal predecessors, (116), 17 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 19:02:06,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:02:06,179 INFO L93 Difference]: Finished difference Result 126 states and 141 transitions. [2021-05-02 19:02:06,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 19:02:06,179 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 3.0526315789473686) internal successors, (116), 38 states have internal predecessors, (116), 17 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 97 [2021-05-02 19:02:06,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:02:06,180 INFO L225 Difference]: With dead ends: 126 [2021-05-02 19:02:06,180 INFO L226 Difference]: Without dead ends: 126 [2021-05-02 19:02:06,181 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 1802.1ms TimeCoverageRelationStatistics Valid=406, Invalid=3500, Unknown=0, NotChecked=0, Total=3906 [2021-05-02 19:02:06,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-05-02 19:02:06,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 118. [2021-05-02 19:02:06,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 95 states have (on average 1.0842105263157895) internal successors, (103), 96 states have internal predecessors, (103), 12 states have call successors, (12), 11 states have call predecessors, (12), 10 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 19:02:06,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 126 transitions. [2021-05-02 19:02:06,188 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 126 transitions. Word has length 97 [2021-05-02 19:02:06,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:02:06,188 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 126 transitions. [2021-05-02 19:02:06,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 38 states have (on average 3.0526315789473686) internal successors, (116), 38 states have internal predecessors, (116), 17 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 19:02:06,189 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 126 transitions. [2021-05-02 19:02:06,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-02 19:02:06,190 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:02:06,190 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 7, 6, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:02:06,406 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 19:02:06,407 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:02:06,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:02:06,407 INFO L82 PathProgramCache]: Analyzing trace with hash 392634207, now seen corresponding path program 2 times [2021-05-02 19:02:06,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:02:06,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933599181] [2021-05-02 19:02:06,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:02:06,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:02:06,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:02:06,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:02:06,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-02 19:02:06,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:02:06,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-02 19:02:06,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:02:06,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-05-02 19:02:06,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:02:06,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-05-02 19:02:06,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:02:06,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-05-02 19:02:06,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:02:06,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-05-02 19:02:06,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:02:06,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-05-02 19:02:06,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:02:06,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-05-02 19:02:06,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:02:06,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-05-02 19:02:06,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:02:06,580 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 36 proven. 218 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-02 19:02:06,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:02:06,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933599181] [2021-05-02 19:02:06,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933599181] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:02:06,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123744619] [2021-05-02 19:02:06,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:02:07,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:02:07,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:02:07,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 19:02:07,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:02:07,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:07,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:07,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:07,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:07,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:07,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:07,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:07,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:07,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:07,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:07,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:07,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:07,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:07,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:07,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:07,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:07,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:07,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:07,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:02:07,311 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 36 proven. 218 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-02 19:02:07,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123744619] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:02:07,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 19:02:07,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-05-02 19:02:07,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161959736] [2021-05-02 19:02:07,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 19:02:07,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:02:07,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 19:02:07,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-05-02 19:02:07,314 INFO L87 Difference]: Start difference. First operand 118 states and 126 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 13 states have internal predecessors, (71), 12 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 19:02:08,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:02:08,094 INFO L93 Difference]: Finished difference Result 136 states and 151 transitions. [2021-05-02 19:02:08,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 19:02:08,095 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 13 states have internal predecessors, (71), 12 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 113 [2021-05-02 19:02:08,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:02:08,096 INFO L225 Difference]: With dead ends: 136 [2021-05-02 19:02:08,096 INFO L226 Difference]: Without dead ends: 136 [2021-05-02 19:02:08,096 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 424.0ms TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-05-02 19:02:08,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-02 19:02:08,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 129. [2021-05-02 19:02:08,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 105 states have (on average 1.0761904761904761) internal successors, (113), 105 states have internal predecessors, (113), 13 states have call successors, (13), 11 states have call predecessors, (13), 10 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 19:02:08,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 138 transitions. [2021-05-02 19:02:08,100 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 138 transitions. Word has length 113 [2021-05-02 19:02:08,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:02:08,100 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 138 transitions. [2021-05-02 19:02:08,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 13 states have internal predecessors, (71), 12 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 19:02:08,100 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 138 transitions. [2021-05-02 19:02:08,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-05-02 19:02:08,101 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:02:08,101 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 8, 7, 6, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:02:08,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 19:02:08,313 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:02:08,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:02:08,313 INFO L82 PathProgramCache]: Analyzing trace with hash 416319375, now seen corresponding path program 3 times [2021-05-02 19:02:08,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:02:08,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538275635] [2021-05-02 19:02:08,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:02:08,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:02:08,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:02:08,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:02:08,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-02 19:02:08,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:02:08,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-02 19:02:08,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:02:08,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-05-02 19:02:08,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:02:08,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-05-02 19:02:08,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:02:08,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-05-02 19:02:08,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:02:08,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-05-02 19:02:08,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:02:08,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-05-02 19:02:08,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:02:08,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-05-02 19:02:08,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:02:08,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-05-02 19:02:08,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:02:08,821 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 18 proven. 255 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-05-02 19:02:08,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:02:08,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538275635] [2021-05-02 19:02:08,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538275635] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:02:08,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210372372] [2021-05-02 19:02:08,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true