/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/insertion_sort-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 17:37:12,207 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 17:37:12,209 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 17:37:12,241 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 17:37:12,283 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 17:37:12,284 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 17:37:12,284 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 17:37:12,285 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 17:37:12,297 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 17:37:12,297 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 17:37:12,299 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 17:37:12,300 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 17:37:12,300 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 17:37:12,314 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 17:37:12,314 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 17:37:12,314 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 17:37:12,314 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 17:37:12,314 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 17:37:12,324 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 17:37:12,325 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 17:37:12,325 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 17:37:12,325 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 17:37:12,325 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 17:37:12,325 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 17:37:12,325 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 17:37:12,326 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 17:37:12,326 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 17:37:12,326 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 17:37:12,326 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 17:37:12,327 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 17:37:12,327 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 17:37:12,645 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 17:37:12,663 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 17:37:12,667 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 17:37:12,668 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 17:37:12,669 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 17:37:12,669 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/insertion_sort-1.c [2021-05-02 17:37:12,722 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddd9bd307/72e804b2075c4f09a6864473dc953c25/FLAG6127cc741 [2021-05-02 17:37:13,088 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 17:37:13,088 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-1.c [2021-05-02 17:37:13,092 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddd9bd307/72e804b2075c4f09a6864473dc953c25/FLAG6127cc741 [2021-05-02 17:37:13,107 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddd9bd307/72e804b2075c4f09a6864473dc953c25 [2021-05-02 17:37:13,109 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 17:37:13,111 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 17:37:13,115 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 17:37:13,115 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 17:37:13,117 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 17:37:13,118 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:37:13" (1/1) ... [2021-05-02 17:37:13,119 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4337f7a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:37:13, skipping insertion in model container [2021-05-02 17:37:13,119 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:37:13" (1/1) ... [2021-05-02 17:37:13,123 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 17:37:13,135 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 17:37:13,248 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/insertion_sort-1.c[328,341] [2021-05-02 17:37:13,262 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:37:13,267 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 17:37:13,318 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/insertion_sort-1.c[328,341] [2021-05-02 17:37:13,337 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:37:13,346 INFO L208 MainTranslator]: Completed translation [2021-05-02 17:37:13,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:37:13 WrapperNode [2021-05-02 17:37:13,347 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 17:37:13,347 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 17:37:13,347 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 17:37:13,348 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 17:37:13,382 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:37:13" (1/1) ... [2021-05-02 17:37:13,382 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:37:13" (1/1) ... [2021-05-02 17:37:13,387 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:37:13" (1/1) ... [2021-05-02 17:37:13,387 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:37:13" (1/1) ... [2021-05-02 17:37:13,392 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:37:13" (1/1) ... [2021-05-02 17:37:13,411 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:37:13" (1/1) ... [2021-05-02 17:37:13,412 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:37:13" (1/1) ... [2021-05-02 17:37:13,414 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 17:37:13,415 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 17:37:13,415 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 17:37:13,415 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 17:37:13,416 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:37:13" (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 17:37:13,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 17:37:13,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 17:37:13,512 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 17:37:13,512 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 17:37:13,512 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 17:37:13,512 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 17:37:13,512 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 17:37:13,513 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 17:37:13,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 17:37:13,513 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 17:37:13,513 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-05-02 17:37:13,513 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 17:37:13,513 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 17:37:13,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 17:37:13,514 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 17:37:13,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 17:37:13,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 17:37:13,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 17:37:13,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 17:37:13,775 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 17:37:13,775 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-05-02 17:37:13,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:37:13 BoogieIcfgContainer [2021-05-02 17:37:13,777 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 17:37:13,777 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 17:37:13,777 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 17:37:13,778 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 17:37:13,779 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:37:13" (1/1) ... [2021-05-02 17:37:13,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 05:37:13 BasicIcfg [2021-05-02 17:37:13,791 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 17:37:13,792 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 17:37:13,792 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 17:37:13,794 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 17:37:13,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 05:37:13" (1/4) ... [2021-05-02 17:37:13,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43100558 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:37:13, skipping insertion in model container [2021-05-02 17:37:13,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:37:13" (2/4) ... [2021-05-02 17:37:13,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43100558 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:37:13, skipping insertion in model container [2021-05-02 17:37:13,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:37:13" (3/4) ... [2021-05-02 17:37:13,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43100558 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 05:37:13, skipping insertion in model container [2021-05-02 17:37:13,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 05:37:13" (4/4) ... [2021-05-02 17:37:13,796 INFO L111 eAbstractionObserver]: Analyzing ICFG insertion_sort-1.cJordan [2021-05-02 17:37:13,800 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 17:37:13,802 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 17:37:13,813 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 17:37:13,826 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 17:37:13,826 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 17:37:13,826 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 17:37:13,826 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 17:37:13,826 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 17:37:13,826 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 17:37:13,826 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 17:37:13,827 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 17:37:13,849 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 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 17:37:13,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 17:37:13,854 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:37:13,855 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:37:13,855 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:37:13,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:37:13,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1926103570, now seen corresponding path program 1 times [2021-05-02 17:37:13,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:37:13,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022785055] [2021-05-02 17:37:13,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:37:13,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:14,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:37:14,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:14,133 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 17:37:14,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:37:14,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022785055] [2021-05-02 17:37:14,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022785055] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:37:14,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:37:14,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 17:37:14,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861217651] [2021-05-02 17:37:14,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 17:37:14,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:37:14,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 17:37:14,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:37:14,156 INFO L87 Difference]: Start difference. First operand has 33 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:37:14,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:37:14,228 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2021-05-02 17:37:14,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 17:37:14,230 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-02 17:37:14,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:37:14,235 INFO L225 Difference]: With dead ends: 33 [2021-05-02 17:37:14,235 INFO L226 Difference]: Without dead ends: 28 [2021-05-02 17:37:14,236 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:37:14,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-02 17:37:14,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-05-02 17:37:14,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 17:37:14,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-05-02 17:37:14,263 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 15 [2021-05-02 17:37:14,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:37:14,264 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-05-02 17:37:14,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:37:14,265 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-05-02 17:37:14,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 17:37:14,265 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:37:14,266 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:37:14,266 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 17:37:14,266 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:37:14,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:37:14,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1448912944, now seen corresponding path program 1 times [2021-05-02 17:37:14,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:37:14,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941292719] [2021-05-02 17:37:14,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:37:14,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:14,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:37:14,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:14,457 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 17:37:14,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:37:14,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941292719] [2021-05-02 17:37:14,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941292719] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:37:14,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:37:14,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 17:37:14,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340981863] [2021-05-02 17:37:14,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 17:37:14,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:37:14,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 17:37:14,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 17:37:14,460 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:37:14,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:37:14,540 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2021-05-02 17:37:14,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 17:37:14,540 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-02 17:37:14,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:37:14,541 INFO L225 Difference]: With dead ends: 34 [2021-05-02 17:37:14,541 INFO L226 Difference]: Without dead ends: 30 [2021-05-02 17:37:14,542 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 17:37:14,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-02 17:37:14,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-05-02 17:37:14,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 17:37:14,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2021-05-02 17:37:14,545 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 15 [2021-05-02 17:37:14,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:37:14,545 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2021-05-02 17:37:14,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:37:14,546 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2021-05-02 17:37:14,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 17:37:14,546 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:37:14,546 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:37:14,546 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 17:37:14,547 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:37:14,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:37:14,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1246349198, now seen corresponding path program 1 times [2021-05-02 17:37:14,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:37:14,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695056639] [2021-05-02 17:37:14,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:37:14,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:14,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:37:14,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:14,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:37:14,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:37:14,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695056639] [2021-05-02 17:37:14,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695056639] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:14,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957970371] [2021-05-02 17:37:14,753 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 17:37:14,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:14,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 17:37:14,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:37:14,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:14,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:37:14,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957970371] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:14,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:37:14,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 10 [2021-05-02 17:37:14,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109122976] [2021-05-02 17:37:14,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 17:37:14,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:37:14,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 17:37:14,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:37:14,949 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:37:15,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:37:15,134 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2021-05-02 17:37:15,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 17:37:15,135 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-05-02 17:37:15,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:37:15,136 INFO L225 Difference]: With dead ends: 46 [2021-05-02 17:37:15,136 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 17:37:15,136 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 248.9ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-05-02 17:37:15,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 17:37:15,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2021-05-02 17:37:15,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 17:37:15,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-05-02 17:37:15,139 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 17 [2021-05-02 17:37:15,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:37:15,139 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-05-02 17:37:15,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:37:15,139 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-05-02 17:37:15,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-02 17:37:15,140 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:37:15,140 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:37:15,369 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 17:37:15,369 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:37:15,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:37:15,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1459507809, now seen corresponding path program 1 times [2021-05-02 17:37:15,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:37:15,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720637125] [2021-05-02 17:37:15,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:37:15,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:15,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:37:15,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:15,717 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:37:15,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:37:15,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720637125] [2021-05-02 17:37:15,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720637125] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:15,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017335461] [2021-05-02 17:37:15,718 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 17:37:15,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:15,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 17:37:15,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:37:15,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:15,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:15,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:15,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:15,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:15,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:15,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:15,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:37:15,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-05-02 17:37:15,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:37:15,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:37:15,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:15,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:37:15,978 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:30 [2021-05-02 17:37:15,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:15,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:16,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:16,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:16,035 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:37:16,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-05-02 17:37:16,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:37:16,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:37:16,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:37:16,039 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:3 [2021-05-02 17:37:16,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:16,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:16,072 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 17:37:16,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017335461] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:16,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:37:16,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 22 [2021-05-02 17:37:16,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642635211] [2021-05-02 17:37:16,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 17:37:16,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:37:16,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 17:37:16,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-05-02 17:37:16,073 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 22 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 19 states have internal predecessors, (33), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:37:16,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:37:16,631 INFO L93 Difference]: Finished difference Result 70 states and 86 transitions. [2021-05-02 17:37:16,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 17:37:16,632 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 19 states have internal predecessors, (33), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-05-02 17:37:16,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:37:16,634 INFO L225 Difference]: With dead ends: 70 [2021-05-02 17:37:16,634 INFO L226 Difference]: Without dead ends: 70 [2021-05-02 17:37:16,634 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 664.8ms TimeCoverageRelationStatistics Valid=225, Invalid=1107, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 17:37:16,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-05-02 17:37:16,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 50. [2021-05-02 17:37:16,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 43 states have internal predecessors, (52), 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 17:37:16,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2021-05-02 17:37:16,652 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 25 [2021-05-02 17:37:16,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:37:16,652 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2021-05-02 17:37:16,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 19 states have internal predecessors, (33), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:37:16,652 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2021-05-02 17:37:16,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 17:37:16,653 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:37:16,653 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:37:16,868 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:37:16,869 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:37:16,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:37:16,869 INFO L82 PathProgramCache]: Analyzing trace with hash -765262082, now seen corresponding path program 1 times [2021-05-02 17:37:16,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:37:16,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923408832] [2021-05-02 17:37:16,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:37:16,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:17,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:37:17,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:17,239 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:37:17,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:37:17,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923408832] [2021-05-02 17:37:17,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923408832] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:17,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000350803] [2021-05-02 17:37:17,240 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 17:37:17,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:17,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 17:37:17,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:37:17,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,412 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-05-02 17:37:17,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-05-02 17:37:17,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:37:17,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:37:17,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:37:17,421 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:38 [2021-05-02 17:37:17,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,657 INFO L354 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2021-05-02 17:37:17,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 31 [2021-05-02 17:37:17,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:37:17,674 INFO L628 ElimStorePlain]: treesize reduction 3, result has 92.3 percent of original size [2021-05-02 17:37:17,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-05-02 17:37:17,682 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:62, output treesize:33 [2021-05-02 17:37:17,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,838 INFO L354 Elim1Store]: treesize reduction 78, result has 8.2 percent of original size [2021-05-02 17:37:17,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 16 [2021-05-02 17:37:17,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:37:17,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:37:17,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:37:17,849 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:49, output treesize:3 [2021-05-02 17:37:17,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,898 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 17:37:17,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000350803] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:17,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:37:17,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 32 [2021-05-02 17:37:17,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177960703] [2021-05-02 17:37:17,901 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 17:37:17,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:37:17,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 17:37:17,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-05-02 17:37:17,902 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 32 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 29 states have internal predecessors, (48), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:37:19,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:37:19,035 INFO L93 Difference]: Finished difference Result 103 states and 123 transitions. [2021-05-02 17:37:19,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-02 17:37:19,036 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 29 states have internal predecessors, (48), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-05-02 17:37:19,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:37:19,038 INFO L225 Difference]: With dead ends: 103 [2021-05-02 17:37:19,038 INFO L226 Difference]: Without dead ends: 103 [2021-05-02 17:37:19,039 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 1152.9ms TimeCoverageRelationStatistics Valid=375, Invalid=2487, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 17:37:19,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-02 17:37:19,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 55. [2021-05-02 17:37:19,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 48 states have internal predecessors, (57), 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 17:37:19,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2021-05-02 17:37:19,043 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 30 [2021-05-02 17:37:19,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:37:19,043 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2021-05-02 17:37:19,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 29 states have internal predecessors, (48), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:37:19,044 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2021-05-02 17:37:19,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 17:37:19,044 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:37:19,044 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:37:19,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:37:19,248 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:37:19,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:37:19,249 INFO L82 PathProgramCache]: Analyzing trace with hash -847240814, now seen corresponding path program 2 times [2021-05-02 17:37:19,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:37:19,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001098391] [2021-05-02 17:37:19,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:37:19,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:19,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:37:19,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:19,360 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:37:19,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:37:19,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001098391] [2021-05-02 17:37:19,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001098391] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:19,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081830199] [2021-05-02 17:37:19,361 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 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 17:37:19,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:37:19,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:37:19,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 17:37:19,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:37:19,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:19,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:19,550 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:37:19,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081830199] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:19,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:37:19,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-05-02 17:37:19,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811133149] [2021-05-02 17:37:19,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 17:37:19,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:37:19,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 17:37:19,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:37:19,551 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:37:19,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:37:19,700 INFO L93 Difference]: Finished difference Result 107 states and 128 transitions. [2021-05-02 17:37:19,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 17:37:19,701 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-05-02 17:37:19,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:37:19,702 INFO L225 Difference]: With dead ends: 107 [2021-05-02 17:37:19,702 INFO L226 Difference]: Without dead ends: 107 [2021-05-02 17:37:19,702 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 86.3ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:37:19,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-05-02 17:37:19,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 70. [2021-05-02 17:37:19,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 62 states have (on average 1.1935483870967742) internal successors, (74), 63 states have internal predecessors, (74), 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 17:37:19,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2021-05-02 17:37:19,707 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 31 [2021-05-02 17:37:19,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:37:19,707 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2021-05-02 17:37:19,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:37:19,707 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2021-05-02 17:37:19,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 17:37:19,707 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:37:19,708 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:37:19,921 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:37:19,921 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:37:19,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:37:19,921 INFO L82 PathProgramCache]: Analyzing trace with hash -547485170, now seen corresponding path program 1 times [2021-05-02 17:37:19,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:37:19,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414645698] [2021-05-02 17:37:19,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:37:19,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:20,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:37:20,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:20,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 17:37:20,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:20,021 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 17:37:20,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:37:20,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414645698] [2021-05-02 17:37:20,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414645698] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:20,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834902374] [2021-05-02 17:37:20,021 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 17:37:20,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:20,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 17:37:20,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:37:20,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:20,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:20,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:20,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:20,201 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 17:37:20,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834902374] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:20,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:37:20,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-05-02 17:37:20,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833259672] [2021-05-02 17:37:20,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 17:37:20,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:37:20,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 17:37:20,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 17:37:20,202 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 17:37:20,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:37:20,348 INFO L93 Difference]: Finished difference Result 106 states and 125 transitions. [2021-05-02 17:37:20,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 17:37:20,349 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2021-05-02 17:37:20,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:37:20,350 INFO L225 Difference]: With dead ends: 106 [2021-05-02 17:37:20,350 INFO L226 Difference]: Without dead ends: 87 [2021-05-02 17:37:20,350 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 122.9ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-05-02 17:37:20,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-02 17:37:20,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 66. [2021-05-02 17:37:20,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 58 states have (on average 1.1896551724137931) internal successors, (69), 59 states have internal predecessors, (69), 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 17:37:20,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2021-05-02 17:37:20,353 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 33 [2021-05-02 17:37:20,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:37:20,353 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2021-05-02 17:37:20,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 17:37:20,353 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2021-05-02 17:37:20,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 17:37:20,354 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:37:20,354 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:37:20,571 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:37:20,571 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:37:20,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:37:20,571 INFO L82 PathProgramCache]: Analyzing trace with hash 2007942384, now seen corresponding path program 3 times [2021-05-02 17:37:20,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:37:20,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368497357] [2021-05-02 17:37:20,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:37:20,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:20,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:37:20,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:20,856 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 17:37:20,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:37:20,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368497357] [2021-05-02 17:37:20,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368497357] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:20,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303781627] [2021-05-02 17:37:20,856 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 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 17:37:21,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 17:37:21,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:37:21,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 17:37:21,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:37:21,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:21,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:21,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:21,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-05-02 17:37:21,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:37:21,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:37:21,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:37:21,017 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:9, output treesize:3 [2021-05-02 17:37:21,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:21,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:21,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:21,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:21,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:21,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:21,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:21,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:37:21,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-05-02 17:37:21,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:37:21,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:37:21,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:21,136 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:37:21,136 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:40 [2021-05-02 17:37:21,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:21,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:21,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:21,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:21,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:21,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:21,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:21,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:21,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:21,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:21,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:21,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:21,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:21,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:21,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:21,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:21,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:37:21,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:37:21,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:37:21,215 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:37:21,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-05-02 17:37:21,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:37:21,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:37:21,225 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:37:21,225 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:17 [2021-05-02 17:37:21,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:21,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:21,245 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:37:21,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-05-02 17:37:21,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:37:21,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:37:21,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:37:21,248 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:3 [2021-05-02 17:37:21,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:21,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:21,278 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-02 17:37:21,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303781627] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:21,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:37:21,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 23 [2021-05-02 17:37:21,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582517015] [2021-05-02 17:37:21,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 17:37:21,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:37:21,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 17:37:21,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-05-02 17:37:21,280 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 20 states have internal predecessors, (40), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:37:21,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:37:21,762 INFO L93 Difference]: Finished difference Result 97 states and 115 transitions. [2021-05-02 17:37:21,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 17:37:21,763 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 20 states have internal predecessors, (40), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-05-02 17:37:21,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:37:21,763 INFO L225 Difference]: With dead ends: 97 [2021-05-02 17:37:21,764 INFO L226 Difference]: Without dead ends: 97 [2021-05-02 17:37:21,764 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 555.4ms TimeCoverageRelationStatistics Valid=164, Invalid=892, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 17:37:21,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-05-02 17:37:21,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 75. [2021-05-02 17:37:21,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 67 states have (on average 1.1940298507462686) internal successors, (80), 68 states have internal predecessors, (80), 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 17:37:21,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2021-05-02 17:37:21,770 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 33 [2021-05-02 17:37:21,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:37:21,770 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2021-05-02 17:37:21,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 20 states have internal predecessors, (40), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:37:21,770 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2021-05-02 17:37:21,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 17:37:21,771 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:37:21,771 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:37:21,993 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:37:21,993 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:37:21,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:37:21,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1553999756, now seen corresponding path program 1 times [2021-05-02 17:37:21,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:37:21,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880144694] [2021-05-02 17:37:21,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:37:22,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:22,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:37:22,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:22,247 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 17:37:22,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:37:22,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880144694] [2021-05-02 17:37:22,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880144694] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:22,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455965974] [2021-05-02 17:37:22,248 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 17:37:22,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:22,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 17:37:22,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:37:22,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:22,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:22,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:22,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:22,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:22,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:37:22,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-05-02 17:37:22,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:37:22,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:37:22,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:37:22,417 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:17 [2021-05-02 17:37:22,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:22,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:22,442 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:37:22,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-05-02 17:37:22,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:37:22,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:37:22,445 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:37:22,445 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:3 [2021-05-02 17:37:22,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:22,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:22,472 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-02 17:37:22,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455965974] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:22,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:37:22,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 23 [2021-05-02 17:37:22,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475218635] [2021-05-02 17:37:22,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 17:37:22,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:37:22,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 17:37:22,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-05-02 17:37:22,474 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand has 23 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 20 states have internal predecessors, (47), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:37:23,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:37:23,594 INFO L93 Difference]: Finished difference Result 201 states and 244 transitions. [2021-05-02 17:37:23,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-02 17:37:23,595 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 20 states have internal predecessors, (47), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-05-02 17:37:23,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:37:23,596 INFO L225 Difference]: With dead ends: 201 [2021-05-02 17:37:23,596 INFO L226 Difference]: Without dead ends: 201 [2021-05-02 17:37:23,597 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1110 ImplicationChecksByTransitivity, 979.7ms TimeCoverageRelationStatistics Valid=605, Invalid=3177, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 17:37:23,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-05-02 17:37:23,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 91. [2021-05-02 17:37:23,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 83 states have (on average 1.216867469879518) internal successors, (101), 84 states have internal predecessors, (101), 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 17:37:23,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 108 transitions. [2021-05-02 17:37:23,602 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 108 transitions. Word has length 38 [2021-05-02 17:37:23,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:37:23,603 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 108 transitions. [2021-05-02 17:37:23,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 20 states have internal predecessors, (47), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:37:23,603 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 108 transitions. [2021-05-02 17:37:23,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 17:37:23,603 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:37:23,604 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:37:23,819 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:37:23,819 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:37:23,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:37:23,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1626243309, now seen corresponding path program 2 times [2021-05-02 17:37:23,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:37:23,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875739250] [2021-05-02 17:37:23,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:37:23,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:24,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:37:24,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:24,202 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 17:37:24,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:37:24,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875739250] [2021-05-02 17:37:24,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875739250] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:24,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894628048] [2021-05-02 17:37:24,202 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 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 17:37:24,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:37:24,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:37:24,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 17:37:24,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:37:24,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,386 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-05-02 17:37:24,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-05-02 17:37:24,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:37:24,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:37:24,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:37:24,394 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:44 [2021-05-02 17:37:24,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,573 INFO L354 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2021-05-02 17:37:24,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 31 [2021-05-02 17:37:24,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:37:24,592 INFO L628 ElimStorePlain]: treesize reduction 5, result has 88.6 percent of original size [2021-05-02 17:37:24,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-05-02 17:37:24,597 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:68, output treesize:36 [2021-05-02 17:37:24,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,777 INFO L354 Elim1Store]: treesize reduction 88, result has 22.1 percent of original size [2021-05-02 17:37:24,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2021-05-02 17:37:24,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:37:24,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:37:24,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-05-02 17:37:24,791 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:46, output treesize:33 [2021-05-02 17:37:24,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,918 INFO L354 Elim1Store]: treesize reduction 78, result has 8.2 percent of original size [2021-05-02 17:37:24,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 16 [2021-05-02 17:37:24,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:37:24,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:37:24,926 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:37:24,927 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:49, output treesize:3 [2021-05-02 17:37:24,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,976 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-02 17:37:24,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894628048] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:24,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:37:24,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 38 [2021-05-02 17:37:24,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773121872] [2021-05-02 17:37:24,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-02 17:37:24,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:37:24,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-02 17:37:24,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1244, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 17:37:24,978 INFO L87 Difference]: Start difference. First operand 91 states and 108 transitions. Second operand has 38 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 35 states have internal predecessors, (62), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:37:25,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:37:25,864 INFO L93 Difference]: Finished difference Result 122 states and 146 transitions. [2021-05-02 17:37:25,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 17:37:25,865 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 35 states have internal predecessors, (62), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-05-02 17:37:25,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:37:25,865 INFO L225 Difference]: With dead ends: 122 [2021-05-02 17:37:25,865 INFO L226 Difference]: Without dead ends: 122 [2021-05-02 17:37:25,866 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 1042.8ms TimeCoverageRelationStatistics Valid=290, Invalid=2160, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 17:37:25,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-05-02 17:37:25,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 90. [2021-05-02 17:37:25,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 82 states have (on average 1.2195121951219512) internal successors, (100), 83 states have internal predecessors, (100), 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 17:37:25,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 107 transitions. [2021-05-02 17:37:25,870 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 107 transitions. Word has length 38 [2021-05-02 17:37:25,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:37:25,870 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 107 transitions. [2021-05-02 17:37:25,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 35 states have internal predecessors, (62), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:37:25,871 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 107 transitions. [2021-05-02 17:37:25,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 17:37:25,871 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:37:25,871 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:37:26,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 17:37:26,081 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:37:26,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:37:26,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1062518689, now seen corresponding path program 2 times [2021-05-02 17:37:26,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:37:26,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489386888] [2021-05-02 17:37:26,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:37:26,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:26,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:37:26,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:26,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-05-02 17:37:26,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:26,283 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:37:26,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:37:26,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489386888] [2021-05-02 17:37:26,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489386888] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:26,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12850091] [2021-05-02 17:37:26,283 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 17:37:26,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:37:26,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:37:26,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 17:37:26,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:37:26,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-02 17:37:26,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:37:26,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:37:26,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:37:26,428 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:7 [2021-05-02 17:37:26,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,454 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-05-02 17:37:26,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-05-02 17:37:26,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:37:26,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:37:26,459 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:37:26,459 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:15 [2021-05-02 17:37:26,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:28,512 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_main_~#v~0.base_BEFORE_CALL_1| Int) (|v_main_~#v~0.offset_BEFORE_CALL_1| Int)) (let ((.cse0 (select |c_#memory_int| |v_main_~#v~0.base_BEFORE_CALL_1|))) (<= (select .cse0 (+ |v_main_~#v~0.offset_BEFORE_CALL_1| 4)) (select .cse0 (+ |v_main_~#v~0.offset_BEFORE_CALL_1| 8))))) is different from true [2021-05-02 17:37:28,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:28,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:28,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:28,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:28,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,554 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 16 [2021-05-02 17:37:30,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:34,594 WARN L205 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 17 [2021-05-02 17:37:34,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:34,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:34,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:34,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:34,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:34,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:34,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:34,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:34,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:34,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:34,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:34,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:34,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:34,645 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-05-02 17:37:34,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2021-05-02 17:37:34,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:37:34,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:37:34,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:37:34,648 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:3 [2021-05-02 17:37:34,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:34,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:36,691 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 1 not checked. [2021-05-02 17:37:36,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12850091] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:36,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:37:36,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 24 [2021-05-02 17:37:36,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565232697] [2021-05-02 17:37:36,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 17:37:36,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:37:36,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 17:37:36,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=448, Unknown=3, NotChecked=42, Total=552 [2021-05-02 17:37:36,693 INFO L87 Difference]: Start difference. First operand 90 states and 107 transitions. Second operand has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 20 states have internal predecessors, (51), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:37:41,127 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 43 [2021-05-02 17:37:43,188 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 46 [2021-05-02 17:37:47,255 WARN L205 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-05-02 17:37:55,420 WARN L205 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-05-02 17:37:59,481 WARN L205 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-05-02 17:37:59,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:37:59,551 INFO L93 Difference]: Finished difference Result 154 states and 185 transitions. [2021-05-02 17:37:59,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 17:37:59,552 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 20 states have internal predecessors, (51), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2021-05-02 17:37:59,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:37:59,553 INFO L225 Difference]: With dead ends: 154 [2021-05-02 17:37:59,553 INFO L226 Difference]: Without dead ends: 154 [2021-05-02 17:37:59,553 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 33 SyntacticMatches, 7 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 30777.0ms TimeCoverageRelationStatistics Valid=194, Invalid=1445, Unknown=5, NotChecked=78, Total=1722 [2021-05-02 17:37:59,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-05-02 17:37:59,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 106. [2021-05-02 17:37:59,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 96 states have (on average 1.2083333333333333) internal successors, (116), 97 states have internal predecessors, (116), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 17:37:59,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 125 transitions. [2021-05-02 17:37:59,557 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 125 transitions. Word has length 41 [2021-05-02 17:37:59,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:37:59,557 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 125 transitions. [2021-05-02 17:37:59,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 20 states have internal predecessors, (51), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:37:59,557 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 125 transitions. [2021-05-02 17:37:59,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 17:37:59,558 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:37:59,558 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:37:59,769 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 17:37:59,769 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:37:59,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:37:59,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1068189391, now seen corresponding path program 3 times [2021-05-02 17:37:59,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:37:59,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243236756] [2021-05-02 17:37:59,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:37:59,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:00,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:38:00,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:00,153 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 17:38:00,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:38:00,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243236756] [2021-05-02 17:38:00,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243236756] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:38:00,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459627600] [2021-05-02 17:38:00,153 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 [2021-05-02 17:38:00,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 17:38:00,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:38:00,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 17:38:00,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:38:00,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:00,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:00,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:00,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:00,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:00,433 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-05-02 17:38:00,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-05-02 17:38:00,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:38:00,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:38:00,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:38:00,439 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:36 [2021-05-02 17:38:00,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:00,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:00,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:00,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:00,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:00,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:00,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:00,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:00,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:00,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:00,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:00,571 INFO L354 Elim1Store]: treesize reduction 60, result has 16.7 percent of original size [2021-05-02 17:38:00,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 31 [2021-05-02 17:38:00,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:38:00,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:38:00,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:00,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:38:00,580 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:58, output treesize:30 [2021-05-02 17:38:00,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:00,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:00,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:00,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:00,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:00,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:00,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:00,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:00,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:00,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:00,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:00,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:00,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:00,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:00,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:00,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:00,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:00,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:00,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:00,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:00,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:00,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:00,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:00,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:00,683 INFO L354 Elim1Store]: treesize reduction 78, result has 8.2 percent of original size [2021-05-02 17:38:00,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 16 [2021-05-02 17:38:00,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:38:00,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:38:00,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:38:00,690 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:46, output treesize:3 [2021-05-02 17:38:00,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:00,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:00,742 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 17:38:00,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459627600] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:38:00,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:38:00,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 14] total 32 [2021-05-02 17:38:00,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613296146] [2021-05-02 17:38:00,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 17:38:00,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:38:00,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 17:38:00,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2021-05-02 17:38:00,744 INFO L87 Difference]: Start difference. First operand 106 states and 125 transitions. Second operand has 32 states, 31 states have (on average 2.225806451612903) internal successors, (69), 29 states have internal predecessors, (69), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:38:03,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:38:03,066 INFO L93 Difference]: Finished difference Result 189 states and 225 transitions. [2021-05-02 17:38:03,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-02 17:38:03,067 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.225806451612903) internal successors, (69), 29 states have internal predecessors, (69), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2021-05-02 17:38:03,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:38:03,068 INFO L225 Difference]: With dead ends: 189 [2021-05-02 17:38:03,068 INFO L226 Difference]: Without dead ends: 189 [2021-05-02 17:38:03,069 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2396 ImplicationChecksByTransitivity, 2138.0ms TimeCoverageRelationStatistics Valid=873, Invalid=6783, Unknown=0, NotChecked=0, Total=7656 [2021-05-02 17:38:03,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-05-02 17:38:03,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 104. [2021-05-02 17:38:03,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 94 states have (on average 1.202127659574468) internal successors, (113), 95 states have internal predecessors, (113), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 17:38:03,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 122 transitions. [2021-05-02 17:38:03,074 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 122 transitions. Word has length 43 [2021-05-02 17:38:03,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:38:03,074 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 122 transitions. [2021-05-02 17:38:03,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 31 states have (on average 2.225806451612903) internal successors, (69), 29 states have internal predecessors, (69), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:38:03,074 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 122 transitions. [2021-05-02 17:38:03,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 17:38:03,075 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:38:03,075 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:38:03,297 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 17:38:03,297 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:38:03,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:38:03,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1915025960, now seen corresponding path program 1 times [2021-05-02 17:38:03,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:38:03,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551284309] [2021-05-02 17:38:03,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:38:03,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:03,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:38:03,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:03,461 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-02 17:38:03,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:38:03,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551284309] [2021-05-02 17:38:03,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551284309] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:38:03,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58011961] [2021-05-02 17:38:03,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:38:03,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:03,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 17:38:03,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:38:03,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:03,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-05-02 17:38:03,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:38:03,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:38:03,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:38:03,667 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:35 [2021-05-02 17:38:03,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:03,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:03,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:03,809 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:38:03,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2021-05-02 17:38:03,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:38:03,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:38:03,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:38:03,820 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:49, output treesize:30 [2021-05-02 17:38:03,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:03,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:03,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:03,975 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:38:03,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2021-05-02 17:38:03,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:38:03,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:38:03,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:38:03,987 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:49, output treesize:30 [2021-05-02 17:38:03,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:04,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:04,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:04,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:04,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:04,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:04,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:04,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:04,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:04,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:04,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:04,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:04,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:04,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:04,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:04,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:04,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:04,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:04,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:04,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:04,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:04,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:04,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:04,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:04,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:04,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-02 17:38:04,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-02 17:38:04,084 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:38:04,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 16 [2021-05-02 17:38:04,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:38:04,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:38:04,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:38:04,091 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:3 [2021-05-02 17:38:04,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:04,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:04,153 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 17:38:04,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58011961] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:38:04,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:38:04,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 26 [2021-05-02 17:38:04,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140678622] [2021-05-02 17:38:04,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 17:38:04,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:38:04,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 17:38:04,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2021-05-02 17:38:04,155 INFO L87 Difference]: Start difference. First operand 104 states and 122 transitions. Second operand has 26 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:38:06,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:38:06,052 INFO L93 Difference]: Finished difference Result 298 states and 359 transitions. [2021-05-02 17:38:06,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-02 17:38:06,053 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-05-02 17:38:06,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:38:06,054 INFO L225 Difference]: With dead ends: 298 [2021-05-02 17:38:06,054 INFO L226 Difference]: Without dead ends: 298 [2021-05-02 17:38:06,055 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1494.5ms TimeCoverageRelationStatistics Valid=428, Invalid=2994, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 17:38:06,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-05-02 17:38:06,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 157. [2021-05-02 17:38:06,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 147 states have (on average 1.2040816326530612) internal successors, (177), 148 states have internal predecessors, (177), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 17:38:06,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 186 transitions. [2021-05-02 17:38:06,060 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 186 transitions. Word has length 44 [2021-05-02 17:38:06,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:38:06,060 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 186 transitions. [2021-05-02 17:38:06,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:38:06,060 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 186 transitions. [2021-05-02 17:38:06,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 17:38:06,061 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:38:06,061 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:38:06,275 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:38:06,276 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:38:06,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:38:06,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1328658693, now seen corresponding path program 1 times [2021-05-02 17:38:06,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:38:06,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326774974] [2021-05-02 17:38:06,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:38:06,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:06,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:38:06,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:06,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-05-02 17:38:06,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:06,600 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:38:06,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:38:06,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326774974] [2021-05-02 17:38:06,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326774974] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:38:06,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386703926] [2021-05-02 17:38:06,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:38:06,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:06,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 17:38:06,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:38:06,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,739 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-05-02 17:38:06,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 29 [2021-05-02 17:38:06,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:38:06,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:38:06,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:38:06,746 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:39 [2021-05-02 17:38:06,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,885 INFO L354 Elim1Store]: treesize reduction 86, result has 9.5 percent of original size [2021-05-02 17:38:06,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 30 [2021-05-02 17:38:06,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:38:06,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:38:06,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:38:06,896 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:27 [2021-05-02 17:38:06,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:12,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:12,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:12,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:12,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:12,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:12,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:12,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:12,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:12,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:12,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:13,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:13,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:13,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:13,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:13,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:13,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:13,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:13,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:13,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:13,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:13,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:13,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:13,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:13,078 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-05-02 17:38:13,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 12 [2021-05-02 17:38:13,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:38:13,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:38:13,081 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:38:13,081 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:5 [2021-05-02 17:38:13,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:13,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:13,124 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-02 17:38:13,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386703926] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:38:13,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:38:13,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 27 [2021-05-02 17:38:13,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926810680] [2021-05-02 17:38:13,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-02 17:38:13,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:38:13,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-02 17:38:13,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=628, Unknown=1, NotChecked=0, Total=702 [2021-05-02 17:38:13,126 INFO L87 Difference]: Start difference. First operand 157 states and 186 transitions. Second operand has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 23 states have internal predecessors, (57), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:38:58,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:38:58,141 INFO L93 Difference]: Finished difference Result 212 states and 249 transitions. [2021-05-02 17:38:58,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 17:38:58,141 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 23 states have internal predecessors, (57), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2021-05-02 17:38:58,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:38:58,142 INFO L225 Difference]: With dead ends: 212 [2021-05-02 17:38:58,142 INFO L226 Difference]: Without dead ends: 212 [2021-05-02 17:38:58,143 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 10930.5ms TimeCoverageRelationStatistics Valid=208, Invalid=1769, Unknown=3, NotChecked=0, Total=1980 [2021-05-02 17:38:58,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-05-02 17:38:58,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 158. [2021-05-02 17:38:58,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 148 states have (on average 1.2094594594594594) internal successors, (179), 149 states have internal predecessors, (179), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 17:38:58,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 188 transitions. [2021-05-02 17:38:58,146 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 188 transitions. Word has length 46 [2021-05-02 17:38:58,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:38:58,146 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 188 transitions. [2021-05-02 17:38:58,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 23 states have internal predecessors, (57), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:38:58,146 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 188 transitions. [2021-05-02 17:38:58,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 17:38:58,147 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:38:58,147 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:38:58,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:38:58,357 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:38:58,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:38:58,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1792607455, now seen corresponding path program 2 times [2021-05-02 17:38:58,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:38:58,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226663084] [2021-05-02 17:38:58,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:38:58,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:58,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:38:58,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:58,694 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 17:38:58,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:38:58,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226663084] [2021-05-02 17:38:58,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226663084] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:38:58,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442076294] [2021-05-02 17:38:58,695 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:38:58,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:38:58,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:38:58,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 17:38:58,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:38:58,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:58,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:58,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:58,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:58,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:58,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:58,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:58,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:58,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:58,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:58,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-05-02 17:38:58,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:38:58,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:38:58,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:58,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:38:58,975 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:35 [2021-05-02 17:38:58,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:58,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:59,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:59,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:59,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:59,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:59,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:59,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:59,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:59,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:59,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:59,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:59,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:59,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:59,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:59,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:59,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:59,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:59,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:59,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:59,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:59,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:59,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:59,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:59,090 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:38:59,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-05-02 17:38:59,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:38:59,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:38:59,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:38:59,098 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:17 [2021-05-02 17:38:59,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:59,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:59,120 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:38:59,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-05-02 17:38:59,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:38:59,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:38:59,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:38:59,123 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:3 [2021-05-02 17:38:59,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:59,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:59,160 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 17:38:59,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442076294] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:38:59,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:38:59,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 30 [2021-05-02 17:38:59,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994680819] [2021-05-02 17:38:59,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 17:38:59,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:38:59,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 17:38:59,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2021-05-02 17:38:59,162 INFO L87 Difference]: Start difference. First operand 158 states and 188 transitions. Second operand has 30 states, 29 states have (on average 2.103448275862069) internal successors, (61), 27 states have internal predecessors, (61), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:39:00,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:39:00,601 INFO L93 Difference]: Finished difference Result 278 states and 335 transitions. [2021-05-02 17:39:00,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-02 17:39:00,602 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.103448275862069) internal successors, (61), 27 states have internal predecessors, (61), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-05-02 17:39:00,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:39:00,603 INFO L225 Difference]: With dead ends: 278 [2021-05-02 17:39:00,603 INFO L226 Difference]: Without dead ends: 278 [2021-05-02 17:39:00,603 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1177.3ms TimeCoverageRelationStatistics Valid=444, Invalid=2636, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 17:39:00,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-05-02 17:39:00,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 179. [2021-05-02 17:39:00,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 169 states have (on average 1.242603550295858) internal successors, (210), 170 states have internal predecessors, (210), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 17:39:00,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 219 transitions. [2021-05-02 17:39:00,609 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 219 transitions. Word has length 46 [2021-05-02 17:39:00,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:39:00,609 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 219 transitions. [2021-05-02 17:39:00,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 29 states have (on average 2.103448275862069) internal successors, (61), 27 states have internal predecessors, (61), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:39:00,609 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 219 transitions. [2021-05-02 17:39:00,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 17:39:00,609 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:39:00,610 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:39:00,810 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-02 17:39:00,810 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:39:00,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:39:00,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1570483864, now seen corresponding path program 4 times [2021-05-02 17:39:00,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:39:00,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410026284] [2021-05-02 17:39:00,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:39:00,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:39:01,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:39:01,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:39:01,329 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 17:39:01,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:39:01,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410026284] [2021-05-02 17:39:01,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410026284] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:39:01,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674939832] [2021-05-02 17:39:01,329 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:39:01,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:39:01,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:39:01,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 17:39:01,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:39:01,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:39:01,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 27 [2021-05-02 17:39:01,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:39:01,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:39:01,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:39:01,517 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:44 [2021-05-02 17:39:01,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-02 17:39:01,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:39:01,752 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:39:01,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 42 [2021-05-02 17:39:01,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:39:01,777 INFO L628 ElimStorePlain]: treesize reduction 12, result has 78.6 percent of original size [2021-05-02 17:39:01,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:39:01,779 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:68, output treesize:36 [2021-05-02 17:39:01,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:39:01,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:39:01,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:39:01,855 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:39:01,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2021-05-02 17:39:01,856 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:39:01,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:39:01,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:39:01,863 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:27 [2021-05-02 17:39:01,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:39:01,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:39:01,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:39:01,974 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:39:01,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-05-02 17:39:01,975 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:39:01,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:39:01,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:39:01,982 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:19 [2021-05-02 17:39:02,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:02,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:02,008 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:39:02,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 12 [2021-05-02 17:39:02,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:39:02,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:39:02,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:39:02,011 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:5 [2021-05-02 17:39:02,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:02,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:02,062 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 17:39:02,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674939832] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:39:02,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:39:02,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 36 [2021-05-02 17:39:02,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665516236] [2021-05-02 17:39:02,063 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 17:39:02,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:39:02,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 17:39:02,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 17:39:02,064 INFO L87 Difference]: Start difference. First operand 179 states and 219 transitions. Second operand has 36 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 33 states have internal predecessors, (65), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:39:03,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:39:03,043 INFO L93 Difference]: Finished difference Result 251 states and 304 transitions. [2021-05-02 17:39:03,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-02 17:39:03,043 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 33 states have internal predecessors, (65), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-05-02 17:39:03,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:39:03,044 INFO L225 Difference]: With dead ends: 251 [2021-05-02 17:39:03,044 INFO L226 Difference]: Without dead ends: 251 [2021-05-02 17:39:03,045 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 1310.7ms TimeCoverageRelationStatistics Valid=354, Invalid=2616, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 17:39:03,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-05-02 17:39:03,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 185. [2021-05-02 17:39:03,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 175 states have (on average 1.2571428571428571) internal successors, (220), 176 states have internal predecessors, (220), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 17:39:03,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 229 transitions. [2021-05-02 17:39:03,049 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 229 transitions. Word has length 46 [2021-05-02 17:39:03,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:39:03,049 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 229 transitions. [2021-05-02 17:39:03,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 33 states have internal predecessors, (65), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:39:03,049 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 229 transitions. [2021-05-02 17:39:03,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 17:39:03,050 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:39:03,050 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:39:03,265 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:39:03,266 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:39:03,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:39:03,266 INFO L82 PathProgramCache]: Analyzing trace with hash 2024332494, now seen corresponding path program 3 times [2021-05-02 17:39:03,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:39:03,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708608149] [2021-05-02 17:39:03,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:39:03,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:39:03,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:39:03,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:39:03,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-05-02 17:39:03,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:39:03,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-05-02 17:39:03,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:39:03,418 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 17:39:03,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:39:03,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708608149] [2021-05-02 17:39:03,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708608149] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:39:03,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167327847] [2021-05-02 17:39:03,418 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:39:03,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 17:39:03,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:39:03,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 17:39:03,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:39:03,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:03,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:03,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:03,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:03,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:03,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:03,691 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-02 17:39:03,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167327847] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:39:03,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:39:03,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 13 [2021-05-02 17:39:03,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509929605] [2021-05-02 17:39:03,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 17:39:03,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:39:03,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 17:39:03,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 17:39:03,693 INFO L87 Difference]: Start difference. First operand 185 states and 229 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 17:39:03,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:39:03,930 INFO L93 Difference]: Finished difference Result 268 states and 339 transitions. [2021-05-02 17:39:03,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 17:39:03,931 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 49 [2021-05-02 17:39:03,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:39:03,932 INFO L225 Difference]: With dead ends: 268 [2021-05-02 17:39:03,932 INFO L226 Difference]: Without dead ends: 251 [2021-05-02 17:39:03,932 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 196.2ms TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-05-02 17:39:03,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-05-02 17:39:03,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 188. [2021-05-02 17:39:03,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 178 states have (on average 1.2303370786516854) internal successors, (219), 180 states have internal predecessors, (219), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 17:39:03,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 229 transitions. [2021-05-02 17:39:03,938 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 229 transitions. Word has length 49 [2021-05-02 17:39:03,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:39:03,938 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 229 transitions. [2021-05-02 17:39:03,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 17:39:03,938 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 229 transitions. [2021-05-02 17:39:03,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 17:39:03,939 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:39:03,939 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:39:04,149 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 17:39:04,149 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:39:04,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:39:04,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1233356816, now seen corresponding path program 4 times [2021-05-02 17:39:04,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:39:04,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694462333] [2021-05-02 17:39:04,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:39:04,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:39:04,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:39:04,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:39:04,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-05-02 17:39:04,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:39:04,420 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 17:39:04,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:39:04,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694462333] [2021-05-02 17:39:04,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694462333] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:39:04,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905604576] [2021-05-02 17:39:04,421 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:39:04,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:39:04,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:39:04,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 17:39:04,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:39:04,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:04,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:04,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:04,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-02 17:39:04,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:39:04,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:39:04,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:39:04,561 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:7 [2021-05-02 17:39:04,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:04,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:04,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:04,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:04,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:04,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:39:04,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-05-02 17:39:04,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:39:04,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:39:04,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:39:04,697 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2021-05-02 17:39:04,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:04,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:04,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:04,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:04,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:04,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:39:04,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:39:04,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:39:04,823 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:39:04,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2021-05-02 17:39:04,824 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:39:04,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:39:04,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:39:04,831 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:19 [2021-05-02 17:39:04,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:04,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:04,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:04,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:04,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:04,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:04,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:04,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:04,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:04,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:05,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:05,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:05,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:05,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:05,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:05,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:05,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:05,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:05,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:05,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:05,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:05,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:05,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:05,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:05,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:05,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:05,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:05,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:05,136 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:39:05,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-05-02 17:39:05,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:39:05,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:39:05,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:39:05,140 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:3 [2021-05-02 17:39:05,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:05,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:05,200 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 17:39:05,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905604576] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:39:05,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:39:05,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 35 [2021-05-02 17:39:05,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242365092] [2021-05-02 17:39:05,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-02 17:39:05,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:39:05,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-02 17:39:05,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1057, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 17:39:05,202 INFO L87 Difference]: Start difference. First operand 188 states and 229 transitions. Second operand has 35 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 31 states have internal predecessors, (78), 4 states have call successors, (7), 5 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 17:39:37,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:39:37,086 INFO L93 Difference]: Finished difference Result 318 states and 396 transitions. [2021-05-02 17:39:37,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-02 17:39:37,086 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 31 states have internal predecessors, (78), 4 states have call successors, (7), 5 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 49 [2021-05-02 17:39:37,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:39:37,087 INFO L225 Difference]: With dead ends: 318 [2021-05-02 17:39:37,087 INFO L226 Difference]: Without dead ends: 318 [2021-05-02 17:39:37,089 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 3706.3ms TimeCoverageRelationStatistics Valid=618, Invalid=4073, Unknown=1, NotChecked=0, Total=4692 [2021-05-02 17:39:37,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-05-02 17:39:37,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 230. [2021-05-02 17:39:37,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 216 states have (on average 1.2453703703703705) internal successors, (269), 219 states have internal predecessors, (269), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 17:39:37,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 283 transitions. [2021-05-02 17:39:37,095 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 283 transitions. Word has length 49 [2021-05-02 17:39:37,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:39:37,095 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 283 transitions. [2021-05-02 17:39:37,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 31 states have internal predecessors, (78), 4 states have call successors, (7), 5 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 17:39:37,096 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 283 transitions. [2021-05-02 17:39:37,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 17:39:37,096 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:39:37,096 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:39:37,297 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-02 17:39:37,297 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:39:37,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:39:37,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1937597344, now seen corresponding path program 1 times [2021-05-02 17:39:37,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:39:37,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875998691] [2021-05-02 17:39:37,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:39:37,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:39:38,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:39:38,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:39:38,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-05-02 17:39:38,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:39:38,024 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:39:38,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:39:38,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875998691] [2021-05-02 17:39:38,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875998691] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:39:38,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748309587] [2021-05-02 17:39:38,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:39:38,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:39:38,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-02 17:39:38,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:39:38,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:39:38,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-05-02 17:39:38,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:39:38,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:39:38,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:39:38,228 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:40 [2021-05-02 17:39:38,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 45 [2021-05-02 17:39:38,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:39:38,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:39:38,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:39:38,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:39:38,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:39:38,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:39:38,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:39:38,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 34 [2021-05-02 17:39:38,296 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-02 17:39:38,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:39:38,300 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:39:38,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:39:38,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:39:38,306 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:64, output treesize:44 [2021-05-02 17:39:38,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:39:38,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:39:38,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:39:38,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-02 17:39:38,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:39:38,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:39:38,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-02 17:39:38,519 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-05-02 17:39:38,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 55 [2021-05-02 17:39:38,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:39:38,547 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-05-02 17:39:38,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:39:38,549 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:62, output treesize:43 [2021-05-02 17:39:38,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:39:38,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:39:38,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:39:38,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-02 17:39:38,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:39:38,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:39:38,915 INFO L354 Elim1Store]: treesize reduction 58, result has 32.6 percent of original size [2021-05-02 17:39:38,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 50 treesize of output 67 [2021-05-02 17:39:38,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:39:38,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:39:38,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,939 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:39:38,939 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:62, output treesize:28 [2021-05-02 17:39:38,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:39,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:39,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:39,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:41,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:41,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:41,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:41,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:41,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:41,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:41,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:41,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:41,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:41,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:41,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:41,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:41,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:41,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:41,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:41,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:41,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:41,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:41,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:41,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:41,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:41,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:41,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:41,321 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:39:41,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-05-02 17:39:41,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:39:41,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:39:41,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:39:41,328 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:3 [2021-05-02 17:39:41,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:41,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:41,420 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-02 17:39:41,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748309587] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:39:41,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:39:41,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27] total 41 [2021-05-02 17:39:41,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76635565] [2021-05-02 17:39:41,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-02 17:39:41,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:39:41,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-02 17:39:41,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1463, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 17:39:41,422 INFO L87 Difference]: Start difference. First operand 230 states and 283 transitions. Second operand has 41 states, 40 states have (on average 1.75) internal successors, (70), 37 states have internal predecessors, (70), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:40:25,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:40:25,479 INFO L93 Difference]: Finished difference Result 288 states and 346 transitions. [2021-05-02 17:40:25,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-02 17:40:25,480 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.75) internal successors, (70), 37 states have internal predecessors, (70), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2021-05-02 17:40:25,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:40:25,481 INFO L225 Difference]: With dead ends: 288 [2021-05-02 17:40:25,481 INFO L226 Difference]: Without dead ends: 254 [2021-05-02 17:40:25,482 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 35 SyntacticMatches, 11 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1435 ImplicationChecksByTransitivity, 10727.3ms TimeCoverageRelationStatistics Valid=481, Invalid=4208, Unknown=3, NotChecked=0, Total=4692 [2021-05-02 17:40:25,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-05-02 17:40:25,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 243. [2021-05-02 17:40:25,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 229 states have (on average 1.2314410480349345) internal successors, (282), 232 states have internal predecessors, (282), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 17:40:25,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 296 transitions. [2021-05-02 17:40:25,487 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 296 transitions. Word has length 51 [2021-05-02 17:40:25,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:40:25,487 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 296 transitions. [2021-05-02 17:40:25,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 40 states have (on average 1.75) internal successors, (70), 37 states have internal predecessors, (70), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:40:25,487 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 296 transitions. [2021-05-02 17:40:25,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 17:40:25,488 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:40:25,488 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:40:25,689 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-05-02 17:40:25,689 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:40:25,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:40:25,689 INFO L82 PathProgramCache]: Analyzing trace with hash 905089058, now seen corresponding path program 1 times [2021-05-02 17:40:25,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:40:25,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133938291] [2021-05-02 17:40:25,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:40:25,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:40:25,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:40:25,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:40:25,743 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 17:40:25,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:40:25,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133938291] [2021-05-02 17:40:25,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133938291] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:40:25,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:40:25,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 17:40:25,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124254367] [2021-05-02 17:40:25,744 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 17:40:25,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:40:25,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 17:40:25,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 17:40:25,744 INFO L87 Difference]: Start difference. First operand 243 states and 296 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 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 17:40:25,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:40:25,814 INFO L93 Difference]: Finished difference Result 239 states and 285 transitions. [2021-05-02 17:40:25,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 17:40:25,815 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 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 51 [2021-05-02 17:40:25,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:40:25,815 INFO L225 Difference]: With dead ends: 239 [2021-05-02 17:40:25,816 INFO L226 Difference]: Without dead ends: 239 [2021-05-02 17:40:25,816 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 17:40:25,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-05-02 17:40:25,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 238. [2021-05-02 17:40:25,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 224 states have (on average 1.2053571428571428) internal successors, (270), 227 states have internal predecessors, (270), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 17:40:25,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 284 transitions. [2021-05-02 17:40:25,820 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 284 transitions. Word has length 51 [2021-05-02 17:40:25,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:40:25,820 INFO L480 AbstractCegarLoop]: Abstraction has 238 states and 284 transitions. [2021-05-02 17:40:25,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 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 17:40:25,820 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 284 transitions. [2021-05-02 17:40:25,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 17:40:25,821 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:40:25,821 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:40:25,821 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-05-02 17:40:25,821 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:40:25,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:40:25,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1511489662, now seen corresponding path program 5 times [2021-05-02 17:40:25,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:40:25,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979880208] [2021-05-02 17:40:25,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:40:25,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:40:26,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:40:26,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:40:26,440 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 17:40:26,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:40:26,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979880208] [2021-05-02 17:40:26,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979880208] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:40:26,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476291234] [2021-05-02 17:40:26,441 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:40:26,580 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 17:40:26,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:40:26,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 17:40:26,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:40:26,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:26,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:26,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:26,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:26,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:26,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:26,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:40:26,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 27 [2021-05-02 17:40:26,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:40:27,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:40:27,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:40:27,003 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:47 [2021-05-02 17:40:27,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:27,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:27,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:27,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:27,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:27,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-02 17:40:27,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:40:27,118 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:40:27,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 43 [2021-05-02 17:40:27,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:40:27,138 INFO L628 ElimStorePlain]: treesize reduction 12, result has 73.9 percent of original size [2021-05-02 17:40:27,139 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:40:27,139 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:31 [2021-05-02 17:40:27,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:27,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:27,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:27,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:27,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:27,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:27,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:27,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:27,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:27,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:27,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:27,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:27,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:27,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:27,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:27,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:27,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:27,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:27,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:27,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:27,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:27,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:27,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:27,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:27,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:27,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:27,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:27,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:27,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:27,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:27,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:27,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:27,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:27,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:27,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:40:27,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:40:27,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:40:27,371 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:40:27,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2021-05-02 17:40:27,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:40:27,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:40:27,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:27,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:40:27,400 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:52, output treesize:31 [2021-05-02 17:40:27,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:27,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:27,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:27,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:27,480 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:40:27,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 12 [2021-05-02 17:40:27,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:40:27,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:40:27,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:40:27,483 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:5 [2021-05-02 17:40:27,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:27,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:27,541 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 17:40:27,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476291234] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:40:27,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:40:27,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 40 [2021-05-02 17:40:27,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088820951] [2021-05-02 17:40:27,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-02 17:40:27,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:40:27,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-02 17:40:27,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1386, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 17:40:27,543 INFO L87 Difference]: Start difference. First operand 238 states and 284 transitions. Second operand has 40 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 37 states have internal predecessors, (79), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:40:30,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:40:30,765 INFO L93 Difference]: Finished difference Result 408 states and 490 transitions. [2021-05-02 17:40:30,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-02 17:40:30,766 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 37 states have internal predecessors, (79), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-05-02 17:40:30,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:40:30,768 INFO L225 Difference]: With dead ends: 408 [2021-05-02 17:40:30,768 INFO L226 Difference]: Without dead ends: 408 [2021-05-02 17:40:30,769 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2244 ImplicationChecksByTransitivity, 3119.0ms TimeCoverageRelationStatistics Valid=737, Invalid=6573, Unknown=0, NotChecked=0, Total=7310 [2021-05-02 17:40:30,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-05-02 17:40:30,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 286. [2021-05-02 17:40:30,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 272 states have (on average 1.2058823529411764) internal successors, (328), 275 states have internal predecessors, (328), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 17:40:30,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 342 transitions. [2021-05-02 17:40:30,776 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 342 transitions. Word has length 51 [2021-05-02 17:40:30,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:40:30,776 INFO L480 AbstractCegarLoop]: Abstraction has 286 states and 342 transitions. [2021-05-02 17:40:30,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 37 states have internal predecessors, (79), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:40:30,777 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 342 transitions. [2021-05-02 17:40:30,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 17:40:30,777 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:40:30,777 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 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 17:40:30,994 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-02 17:40:30,994 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:40:30,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:40:30,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1230588528, now seen corresponding path program 2 times [2021-05-02 17:40:30,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:40:30,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652177061] [2021-05-02 17:40:30,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:40:31,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:40:31,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:40:31,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:40:31,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-05-02 17:40:31,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:40:31,632 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:40:31,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:40:31,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652177061] [2021-05-02 17:40:31,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652177061] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:40:31,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124643916] [2021-05-02 17:40:31,633 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:40:31,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:40:31,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:40:31,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 17:40:31,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:40:31,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:31,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:31,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:31,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:31,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:31,910 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-05-02 17:40:31,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-05-02 17:40:31,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:40:31,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:40:31,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:40:31,922 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:40 [2021-05-02 17:40:32,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,125 INFO L354 Elim1Store]: treesize reduction 109, result has 9.2 percent of original size [2021-05-02 17:40:32,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 30 [2021-05-02 17:40:32,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:40:32,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:40:32,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,139 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:40:32,139 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:32 [2021-05-02 17:40:32,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,457 INFO L354 Elim1Store]: treesize reduction 88, result has 20.0 percent of original size [2021-05-02 17:40:32,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2021-05-02 17:40:32,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:40:32,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:40:32,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:40:32,470 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:25 [2021-05-02 17:40:32,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:32,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:47,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:47,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:47,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:47,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:47,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:47,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:47,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:47,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:47,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:47,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:49,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:49,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:49,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:49,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:49,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:49,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:49,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:49,431 INFO L354 Elim1Store]: treesize reduction 40, result has 7.0 percent of original size [2021-05-02 17:40:49,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 13 [2021-05-02 17:40:49,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:40:49,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:40:49,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:40:49,439 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:43, output treesize:3 [2021-05-02 17:40:49,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:49,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:49,517 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 17:40:49,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124643916] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:40:49,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:40:49,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23] total 46 [2021-05-02 17:40:49,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351922429] [2021-05-02 17:40:49,518 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-02 17:40:49,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:40:49,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-02 17:40:49,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1876, Unknown=6, NotChecked=0, Total=2070 [2021-05-02 17:40:49,519 INFO L87 Difference]: Start difference. First operand 286 states and 342 transitions. Second operand has 46 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 42 states have internal predecessors, (88), 4 states have call successors, (7), 5 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 17:41:51,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:41:51,365 INFO L93 Difference]: Finished difference Result 397 states and 473 transitions. [2021-05-02 17:41:51,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-02 17:41:51,366 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 42 states have internal predecessors, (88), 4 states have call successors, (7), 5 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 54 [2021-05-02 17:41:51,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:41:51,367 INFO L225 Difference]: With dead ends: 397 [2021-05-02 17:41:51,367 INFO L226 Difference]: Without dead ends: 397 [2021-05-02 17:41:51,368 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 33 SyntacticMatches, 7 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2299 ImplicationChecksByTransitivity, 23807.4ms TimeCoverageRelationStatistics Valid=617, Invalid=6017, Unknown=8, NotChecked=0, Total=6642 [2021-05-02 17:41:51,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-05-02 17:41:51,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 292. [2021-05-02 17:41:51,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 278 states have (on average 1.20863309352518) internal successors, (336), 281 states have internal predecessors, (336), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 17:41:51,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 350 transitions. [2021-05-02 17:41:51,374 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 350 transitions. Word has length 54 [2021-05-02 17:41:51,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:41:51,374 INFO L480 AbstractCegarLoop]: Abstraction has 292 states and 350 transitions. [2021-05-02 17:41:51,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 42 states have internal predecessors, (88), 4 states have call successors, (7), 5 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 17:41:51,374 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 350 transitions. [2021-05-02 17:41:51,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 17:41:51,375 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:41:51,375 INFO L523 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:41:51,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-02 17:41:51,593 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:41:51,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:41:51,593 INFO L82 PathProgramCache]: Analyzing trace with hash 800127747, now seen corresponding path program 2 times [2021-05-02 17:41:51,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:41:51,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320091909] [2021-05-02 17:41:51,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:41:51,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:41:52,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:41:52,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:41:52,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-05-02 17:41:52,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:41:52,635 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:41:52,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:41:52,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320091909] [2021-05-02 17:41:52,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320091909] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:41:52,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794087062] [2021-05-02 17:41:52,635 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:41:52,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:41:52,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:41:52,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 17:41:52,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:41:52,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:52,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:52,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:52,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:52,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:52,858 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-05-02 17:41:52,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-05-02 17:41:52,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:41:52,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:41:52,867 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:41:52,867 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:41 [2021-05-02 17:41:53,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,051 INFO L354 Elim1Store]: treesize reduction 109, result has 9.2 percent of original size [2021-05-02 17:41:53,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 30 [2021-05-02 17:41:53,052 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:41:53,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:41:53,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:41:53,062 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:32 [2021-05-02 17:41:53,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,296 INFO L354 Elim1Store]: treesize reduction 96, result has 20.0 percent of original size [2021-05-02 17:41:53,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 39 [2021-05-02 17:41:53,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:41:53,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:41:53,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:41:53,308 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:53 [2021-05-02 17:41:53,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,590 INFO L354 Elim1Store]: treesize reduction 239, result has 12.1 percent of original size [2021-05-02 17:41:53,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 51 [2021-05-02 17:41:53,592 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:41:53,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:41:53,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-05-02 17:41:53,604 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:53 [2021-05-02 17:41:53,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:53,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:54,044 INFO L354 Elim1Store]: treesize reduction 244, result has 16.7 percent of original size [2021-05-02 17:41:54,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 67 [2021-05-02 17:41:54,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:41:54,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:41:54,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:54,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:54,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:54,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:54,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:54,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:54,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:41:54,073 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:72, output treesize:25 [2021-05-02 17:41:54,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:54,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:54,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:54,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:54,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:54,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:54,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:54,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:54,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:54,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:54,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:54,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:54,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:54,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:54,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:54,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:54,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:54,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:54,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:54,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:54,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:54,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:54,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:54,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:54,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:54,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:54,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:54,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:54,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:54,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:41:54,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:25,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:25,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:25,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:25,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:25,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:25,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:25,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:25,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:25,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:25,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:25,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:25,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:25,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:25,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:25,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:25,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:25,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:25,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:26,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:26,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:26,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:26,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:26,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:26,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:26,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:26,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:26,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:26,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:26,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:26,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:26,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:26,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:26,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:26,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:26,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:26,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:26,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:26,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:26,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:26,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:26,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:26,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:26,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:26,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:26,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:26,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:26,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:26,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:26,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:26,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:26,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:26,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:26,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:26,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:26,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:26,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:26,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:26,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:26,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:26,433 INFO L354 Elim1Store]: treesize reduction 40, result has 7.0 percent of original size [2021-05-02 17:42:26,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 13 [2021-05-02 17:42:26,435 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:42:26,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:42:26,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:42:26,448 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:43, output treesize:3 [2021-05-02 17:42:26,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:26,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:26,679 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-02 17:42:26,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794087062] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:42:26,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:42:26,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 58 [2021-05-02 17:42:26,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840242790] [2021-05-02 17:42:26,680 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-02 17:42:26,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:42:26,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-02 17:42:26,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=3056, Unknown=14, NotChecked=0, Total=3306 [2021-05-02 17:42:26,681 INFO L87 Difference]: Start difference. First operand 292 states and 350 transitions. Second operand has 58 states, 55 states have (on average 1.709090909090909) internal successors, (94), 54 states have internal predecessors, (94), 5 states have call successors, (7), 5 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 17:43:42,073 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-05-02 17:44:09,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:44:09,199 INFO L93 Difference]: Finished difference Result 359 states and 425 transitions. [2021-05-02 17:44:09,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-02 17:44:09,199 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 55 states have (on average 1.709090909090909) internal successors, (94), 54 states have internal predecessors, (94), 5 states have call successors, (7), 5 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 56 [2021-05-02 17:44:09,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:44:09,200 INFO L225 Difference]: With dead ends: 359 [2021-05-02 17:44:09,200 INFO L226 Difference]: Without dead ends: 319 [2021-05-02 17:44:09,201 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3052 ImplicationChecksByTransitivity, 68196.4ms TimeCoverageRelationStatistics Valid=725, Invalid=8177, Unknown=28, NotChecked=0, Total=8930 [2021-05-02 17:44:09,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-05-02 17:44:09,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 255. [2021-05-02 17:44:09,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 245 states have (on average 1.236734693877551) internal successors, (303), 246 states have internal predecessors, (303), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 17:44:09,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 312 transitions. [2021-05-02 17:44:09,206 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 312 transitions. Word has length 56 [2021-05-02 17:44:09,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:44:09,206 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 312 transitions. [2021-05-02 17:44:09,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 55 states have (on average 1.709090909090909) internal successors, (94), 54 states have internal predecessors, (94), 5 states have call successors, (7), 5 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 17:44:09,207 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 312 transitions. [2021-05-02 17:44:09,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-02 17:44:09,207 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:44:09,207 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:44:09,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-02 17:44:09,425 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:44:09,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:44:09,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1139412129, now seen corresponding path program 5 times [2021-05-02 17:44:09,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:44:09,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755505340] [2021-05-02 17:44:09,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:44:09,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:44:09,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:44:09,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:44:09,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-05-02 17:44:09,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:44:09,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-05-02 17:44:09,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:44:09,843 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 4 proven. 44 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-02 17:44:09,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:44:09,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755505340] [2021-05-02 17:44:09,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755505340] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:44:09,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773148638] [2021-05-02 17:44:09,843 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:44:10,106 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-02 17:44:10,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:44:10,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 17:44:10,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:44:10,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:10,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:10,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:10,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-02 17:44:10,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:44:10,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:44:10,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:44:10,176 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-05-02 17:44:10,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:10,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:10,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:10,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:10,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:10,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:10,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:10,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 29 [2021-05-02 17:44:10,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:10,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:10,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:10,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:10,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 25 [2021-05-02 17:44:10,223 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-02 17:44:10,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:44:10,228 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:44:10,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:44:10,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:10,238 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:44:10,238 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:47, output treesize:32 [2021-05-02 17:44:10,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:10,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:10,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:10,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:10,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:10,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:10,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:14,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:14,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:14,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:14,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:14,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:14,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:14,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:14,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:14,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:14,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:14,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:14,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:14,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:14,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:14,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:14,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:14,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:14,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:14,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:14,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:14,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:14,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:14,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:14,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:14,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:14,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:14,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:14,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:14,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:14,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:18,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:18,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:18,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:18,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:18,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:18,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:18,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:18,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:18,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:18,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:18,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:18,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:18,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:18,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:18,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:18,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:18,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:18,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:18,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:18,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:18,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:18,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:18,674 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:44:18,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-05-02 17:44:18,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:44:18,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:44:18,679 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:44:18,679 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:3 [2021-05-02 17:44:18,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:18,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:18,740 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-05-02 17:44:18,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773148638] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:44:18,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:44:18,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 25 [2021-05-02 17:44:18,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762925184] [2021-05-02 17:44:18,740 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 17:44:18,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:44:18,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 17:44:18,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=519, Unknown=2, NotChecked=0, Total=600 [2021-05-02 17:44:18,741 INFO L87 Difference]: Start difference. First operand 255 states and 312 transitions. Second operand has 25 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 17:44:54,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:44:54,057 INFO L93 Difference]: Finished difference Result 415 states and 507 transitions. [2021-05-02 17:44:54,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-02 17:44:54,057 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 57 [2021-05-02 17:44:54,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:44:54,058 INFO L225 Difference]: With dead ends: 415 [2021-05-02 17:44:54,058 INFO L226 Difference]: Without dead ends: 415 [2021-05-02 17:44:54,059 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 51 SyntacticMatches, 13 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 13327.2ms TimeCoverageRelationStatistics Valid=262, Invalid=1626, Unknown=4, NotChecked=0, Total=1892 [2021-05-02 17:44:54,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-05-02 17:44:54,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 314. [2021-05-02 17:44:54,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 294 states have (on average 1.2244897959183674) internal successors, (360), 297 states have internal predecessors, (360), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 17:44:54,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 381 transitions. [2021-05-02 17:44:54,065 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 381 transitions. Word has length 57 [2021-05-02 17:44:54,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:44:54,065 INFO L480 AbstractCegarLoop]: Abstraction has 314 states and 381 transitions. [2021-05-02 17:44:54,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 17:44:54,065 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 381 transitions. [2021-05-02 17:44:54,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-02 17:44:54,066 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:44:54,066 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:44:54,270 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-05-02 17:44:54,270 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:44:54,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:44:54,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1633697077, now seen corresponding path program 1 times [2021-05-02 17:44:54,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:44:54,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621070173] [2021-05-02 17:44:54,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:44:54,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:44:54,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:44:54,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:44:54,456 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 25 proven. 49 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-05-02 17:44:54,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:44:54,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621070173] [2021-05-02 17:44:54,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621070173] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:44:54,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556189016] [2021-05-02 17:44:54,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:44:54,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:44:54,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 17:44:54,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:44:54,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:54,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:54,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:54,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:54,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:54,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:54,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-02 17:44:54,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:44:54,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:44:54,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:44:54,842 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-05-02 17:44:54,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:54,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:54,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:54,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:54,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:54,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:54,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:54,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:54,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:54,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:54,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:54,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:54,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:54,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:54,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:54,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:54,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:54,957 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:44:54,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-05-02 17:44:54,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:44:54,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:44:54,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:44:54,967 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:17 [2021-05-02 17:44:55,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:55,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:55,041 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:44:55,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-05-02 17:44:55,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:44:55,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:44:55,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:44:55,047 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:3 [2021-05-02 17:44:55,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:55,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:55,130 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 17:44:55,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556189016] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:44:55,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:44:55,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 31 [2021-05-02 17:44:55,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806702637] [2021-05-02 17:44:55,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-02 17:44:55,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:44:55,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-02 17:44:55,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-05-02 17:44:55,132 INFO L87 Difference]: Start difference. First operand 314 states and 381 transitions. Second operand has 31 states, 30 states have (on average 3.066666666666667) internal successors, (92), 29 states have internal predecessors, (92), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:44:57,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:44:57,342 INFO L93 Difference]: Finished difference Result 740 states and 894 transitions. [2021-05-02 17:44:57,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-02 17:44:57,343 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.066666666666667) internal successors, (92), 29 states have internal predecessors, (92), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2021-05-02 17:44:57,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:44:57,345 INFO L225 Difference]: With dead ends: 740 [2021-05-02 17:44:57,345 INFO L226 Difference]: Without dead ends: 740 [2021-05-02 17:44:57,346 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 1506.2ms TimeCoverageRelationStatistics Valid=395, Invalid=3145, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 17:44:57,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2021-05-02 17:44:57,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 449. [2021-05-02 17:44:57,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 429 states have (on average 1.205128205128205) internal successors, (517), 432 states have internal predecessors, (517), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 17:44:57,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 538 transitions. [2021-05-02 17:44:57,358 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 538 transitions. Word has length 57 [2021-05-02 17:44:57,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:44:57,358 INFO L480 AbstractCegarLoop]: Abstraction has 449 states and 538 transitions. [2021-05-02 17:44:57,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 30 states have (on average 3.066666666666667) internal successors, (92), 29 states have internal predecessors, (92), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:44:57,358 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 538 transitions. [2021-05-02 17:44:57,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-02 17:44:57,359 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:44:57,360 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:44:57,579 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:44:57,580 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:44:57,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:44:57,580 INFO L82 PathProgramCache]: Analyzing trace with hash -73021199, now seen corresponding path program 1 times [2021-05-02 17:44:57,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:44:57,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429658359] [2021-05-02 17:44:57,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:44:57,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:44:58,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:44:58,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:44:58,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-05-02 17:44:58,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:44:58,030 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 17:44:58,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:44:58,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429658359] [2021-05-02 17:44:58,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429658359] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:44:58,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930706699] [2021-05-02 17:44:58,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:44:58,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:44:58,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 17:44:58,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:44:58,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:58,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:58,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:58,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:58,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:58,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:58,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:58,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:58,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:58,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:58,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:58,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:58,350 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-05-02 17:44:58,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-05-02 17:44:58,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:44:58,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:44:58,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:44:58,362 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:36 [2021-05-02 17:44:58,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:58,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:58,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:58,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:58,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:58,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:58,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:58,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:58,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:58,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:58,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:58,559 INFO L354 Elim1Store]: treesize reduction 60, result has 16.7 percent of original size [2021-05-02 17:44:58,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 31 [2021-05-02 17:44:58,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:44:58,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:44:58,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:58,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:44:58,573 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:28 [2021-05-02 17:44:58,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:58,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:58,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:58,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:58,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:58,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:58,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:04,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:04,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:04,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:04,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:04,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:04,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:04,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:04,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:04,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:04,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:04,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:04,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:04,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:04,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:04,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:04,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:04,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:04,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:04,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:04,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:04,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:04,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:04,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:04,918 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-05-02 17:45:04,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 12 [2021-05-02 17:45:04,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:45:04,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:45:04,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:45:04,923 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:5 [2021-05-02 17:45:04,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:04,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:04,985 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 10 proven. 38 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 17:45:04,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930706699] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:45:04,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:45:04,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 35 [2021-05-02 17:45:04,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871832111] [2021-05-02 17:45:04,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-02 17:45:04,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:45:04,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-02 17:45:04,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1070, Unknown=2, NotChecked=0, Total=1190 [2021-05-02 17:45:04,988 INFO L87 Difference]: Start difference. First operand 449 states and 538 transitions. Second operand has 35 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 31 states have internal predecessors, (81), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:45:58,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:45:58,226 INFO L93 Difference]: Finished difference Result 601 states and 720 transitions. [2021-05-02 17:45:58,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-05-02 17:45:58,228 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 31 states have internal predecessors, (81), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2021-05-02 17:45:58,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:45:58,230 INFO L225 Difference]: With dead ends: 601 [2021-05-02 17:45:58,230 INFO L226 Difference]: Without dead ends: 601 [2021-05-02 17:45:58,231 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2941 ImplicationChecksByTransitivity, 16374.8ms TimeCoverageRelationStatistics Valid=935, Invalid=8762, Unknown=5, NotChecked=0, Total=9702 [2021-05-02 17:45:58,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-05-02 17:45:58,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 455. [2021-05-02 17:45:58,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 435 states have (on average 1.2045977011494253) internal successors, (524), 438 states have internal predecessors, (524), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 17:45:58,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 545 transitions. [2021-05-02 17:45:58,241 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 545 transitions. Word has length 59 [2021-05-02 17:45:58,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:45:58,241 INFO L480 AbstractCegarLoop]: Abstraction has 455 states and 545 transitions. [2021-05-02 17:45:58,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 31 states have internal predecessors, (81), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:45:58,242 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 545 transitions. [2021-05-02 17:45:58,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-02 17:45:58,243 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:45:58,243 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:45:58,465 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-05-02 17:45:58,465 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:45:58,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:45:58,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1059642615, now seen corresponding path program 2 times [2021-05-02 17:45:58,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:45:58,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847249998] [2021-05-02 17:45:58,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:45:58,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:45:58,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:45:58,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:45:58,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-05-02 17:45:58,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:45:58,813 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 55 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 17:45:58,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:45:58,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847249998] [2021-05-02 17:45:58,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847249998] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:45:58,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190725273] [2021-05-02 17:45:58,813 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:45:58,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:45:58,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:45:58,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 17:45:58,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:45:58,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:58,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:59,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:59,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:59,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:59,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:59,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:59,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:59,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:59,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:59,156 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-05-02 17:45:59,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-05-02 17:45:59,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:45:59,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:45:59,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:45:59,167 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:15 [2021-05-02 17:45:59,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:59,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:59,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:59,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:59,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:01,193 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_main_~#v~0.offset_BEFORE_CALL_10| Int) (|v_main_~#v~0.base_BEFORE_CALL_10| Int)) (let ((.cse0 (select |c_#memory_int| |v_main_~#v~0.base_BEFORE_CALL_10|))) (<= (select .cse0 (+ |v_main_~#v~0.offset_BEFORE_CALL_10| 4)) (select .cse0 (+ |v_main_~#v~0.offset_BEFORE_CALL_10| 8))))) is different from true [2021-05-02 17:46:01,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:01,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:01,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:01,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:01,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:03,231 WARN L205 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 16 [2021-05-02 17:46:03,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:03,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:03,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:03,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:03,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:07,290 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 17 [2021-05-02 17:46:07,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:07,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:07,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:07,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:07,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:07,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:07,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:07,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:07,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:07,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:07,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:07,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:07,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:07,365 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-05-02 17:46:07,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2021-05-02 17:46:07,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:46:07,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:46:07,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:46:07,370 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:3 [2021-05-02 17:46:07,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:07,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:09,429 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 3 proven. 44 refuted. 0 times theorem prover too weak. 16 trivial. 1 not checked. [2021-05-02 17:46:09,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190725273] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:46:09,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:46:09,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23] total 29 [2021-05-02 17:46:09,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147390891] [2021-05-02 17:46:09,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 17:46:09,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:46:09,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 17:46:09,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=670, Unknown=3, NotChecked=52, Total=812 [2021-05-02 17:46:09,431 INFO L87 Difference]: Start difference. First operand 455 states and 545 transitions. Second operand has 29 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 25 states have internal predecessors, (78), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:46:18,775 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 43 [2021-05-02 17:46:20,827 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 46 [2021-05-02 17:46:24,910 WARN L205 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-05-02 17:46:29,130 WARN L205 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-05-02 17:46:33,213 WARN L205 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-05-02 17:46:33,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:46:33,297 INFO L93 Difference]: Finished difference Result 593 states and 709 transitions. [2021-05-02 17:46:33,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-02 17:46:33,298 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 25 states have internal predecessors, (78), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2021-05-02 17:46:33,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:46:33,301 INFO L225 Difference]: With dead ends: 593 [2021-05-02 17:46:33,301 INFO L226 Difference]: Without dead ends: 593 [2021-05-02 17:46:33,301 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 31473.1ms TimeCoverageRelationStatistics Valid=436, Invalid=3345, Unknown=5, NotChecked=120, Total=3906 [2021-05-02 17:46:33,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-05-02 17:46:33,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 448. [2021-05-02 17:46:33,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 428 states have (on average 1.2032710280373833) internal successors, (515), 431 states have internal predecessors, (515), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 17:46:33,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 536 transitions. [2021-05-02 17:46:33,310 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 536 transitions. Word has length 59 [2021-05-02 17:46:33,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:46:33,311 INFO L480 AbstractCegarLoop]: Abstraction has 448 states and 536 transitions. [2021-05-02 17:46:33,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 25 states have internal predecessors, (78), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:46:33,311 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 536 transitions. [2021-05-02 17:46:33,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-02 17:46:33,312 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:46:33,312 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:46:33,531 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:46:33,531 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:46:33,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:46:33,532 INFO L82 PathProgramCache]: Analyzing trace with hash -309180175, now seen corresponding path program 3 times [2021-05-02 17:46:33,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:46:33,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598328928] [2021-05-02 17:46:33,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:46:33,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:46:34,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:46:34,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:46:34,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-05-02 17:46:34,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:46:34,598 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 7 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:46:34,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:46:34,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598328928] [2021-05-02 17:46:34,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598328928] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:46:34,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633026140] [2021-05-02 17:46:34,598 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:46:34,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-02 17:46:34,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:46:34,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 54 conjunts are in the unsatisfiable core [2021-05-02 17:46:34,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:46:34,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:34,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:34,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:34,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:34,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:34,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-02 17:46:34,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:46:34,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:46:34,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:46:34,887 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:3 [2021-05-02 17:46:34,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:34,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:34,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:34,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:34,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:34,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2021-05-02 17:46:34,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:34,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:46:34,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:46:34,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:46:34,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 22 [2021-05-02 17:46:34,965 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-02 17:46:34,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:46:34,969 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:46:34,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:46:34,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:46:34,977 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:36, output treesize:22 [2021-05-02 17:46:35,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:35,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:35,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:35,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:46:35,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:46:35,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:46:35,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:46:35,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:46:35,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-02 17:46:35,081 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-05-02 17:46:35,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 43 [2021-05-02 17:46:35,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:46:35,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:46:35,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:46:35,091 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:40 [2021-05-02 17:46:35,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:35,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:35,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:35,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:46:35,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:46:35,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:46:35,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:46:35,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:46:35,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-02 17:46:35,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:46:35,301 INFO L354 Elim1Store]: treesize reduction 165, result has 19.9 percent of original size [2021-05-02 17:46:35,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 58 treesize of output 77 [2021-05-02 17:46:35,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:46:35,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:46:35,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:46:35,319 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:67, output treesize:75 [2021-05-02 17:46:35,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:35,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:35,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:35,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:35,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:35,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:35,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:35,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:35,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:35,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:35,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:35,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:35,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:35,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-02 17:46:35,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:46:35,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:46:35,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:46:35,636 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:46:35,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 52 [2021-05-02 17:46:35,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:46:35,659 INFO L628 ElimStorePlain]: treesize reduction 12, result has 77.8 percent of original size [2021-05-02 17:46:35,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:35,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:46:35,662 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:67, output treesize:35 [2021-05-02 17:46:35,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:35,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:35,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:35,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:35,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:35,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:35,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:35,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:35,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:35,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:35,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:35,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:35,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:35,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:35,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:35,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:35,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:35,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 27 [2021-05-02 17:46:35,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:35,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:46:35,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:46:35,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:46:35,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:46:35,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:46:35,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:46:35,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:46:35,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 31 [2021-05-02 17:46:35,843 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-02 17:46:35,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:46:35,847 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:46:35,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:46:35,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:46:35,854 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:19 [2021-05-02 17:46:35,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:35,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:35,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:35,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:35,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:44,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:44,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:44,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:44,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:44,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:44,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:44,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:44,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:44,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:44,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:44,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:44,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:44,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:44,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:44,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:44,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:44,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:44,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:44,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:44,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:44,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:44,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:44,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:44,239 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:46:44,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-05-02 17:46:44,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:46:44,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:46:44,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:46:44,242 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:3 [2021-05-02 17:46:44,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:44,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:44,320 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:46:44,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633026140] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:46:44,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:46:44,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 49 [2021-05-02 17:46:44,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279153089] [2021-05-02 17:46:44,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-02 17:46:44,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:46:44,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-02 17:46:44,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=2067, Unknown=2, NotChecked=0, Total=2352 [2021-05-02 17:46:44,322 INFO L87 Difference]: Start difference. First operand 448 states and 536 transitions. Second operand has 49 states, 48 states have (on average 1.7083333333333333) internal successors, (82), 45 states have internal predecessors, (82), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:47:57,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:47:57,989 INFO L93 Difference]: Finished difference Result 568 states and 667 transitions. [2021-05-02 17:47:57,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-02 17:47:57,990 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 1.7083333333333333) internal successors, (82), 45 states have internal predecessors, (82), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2021-05-02 17:47:57,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:47:57,991 INFO L225 Difference]: With dead ends: 568 [2021-05-02 17:47:57,992 INFO L226 Difference]: Without dead ends: 568 [2021-05-02 17:47:57,992 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 37 SyntacticMatches, 15 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2814 ImplicationChecksByTransitivity, 34059.9ms TimeCoverageRelationStatistics Valid=871, Invalid=7306, Unknown=13, NotChecked=0, Total=8190 [2021-05-02 17:47:57,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-05-02 17:47:57,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 457. [2021-05-02 17:47:57,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 435 states have (on average 1.2) internal successors, (522), 438 states have internal predecessors, (522), 12 states have call successors, (12), 10 states have call predecessors, (12), 9 states have return successors, (11), 8 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 17:47:57,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 545 transitions. [2021-05-02 17:47:57,999 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 545 transitions. Word has length 59 [2021-05-02 17:47:58,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:47:58,000 INFO L480 AbstractCegarLoop]: Abstraction has 457 states and 545 transitions. [2021-05-02 17:47:58,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 48 states have (on average 1.7083333333333333) internal successors, (82), 45 states have internal predecessors, (82), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:47:58,000 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 545 transitions. [2021-05-02 17:47:58,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-02 17:47:58,015 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:47:58,015 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:47:58,245 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-05-02 17:47:58,245 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:47:58,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:47:58,245 INFO L82 PathProgramCache]: Analyzing trace with hash -444231912, now seen corresponding path program 1 times [2021-05-02 17:47:58,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:47:58,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328478249] [2021-05-02 17:47:58,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:47:58,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:47:58,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:47:58,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:47:58,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-05-02 17:47:58,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:47:58,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-05-02 17:47:58,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:47:58,722 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 7 proven. 51 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 17:47:58,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:47:58,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328478249] [2021-05-02 17:47:58,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328478249] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:47:58,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262783595] [2021-05-02 17:47:58,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:47:58,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:47:58,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 17:47:58,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:47:58,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:58,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:58,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:58,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:58,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:58,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:58,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:58,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:47:58,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 33 [2021-05-02 17:47:58,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:47:59,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:47:59,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:47:59,028 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:44 [2021-05-02 17:47:59,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:47:59,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:47:59,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-02 17:47:59,655 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:47:59,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 13 [2021-05-02 17:47:59,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:47:59,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:47:59,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:47:59,662 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:3 [2021-05-02 17:47:59,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:59,711 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-05-02 17:47:59,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262783595] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:47:59,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:47:59,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 30 [2021-05-02 17:47:59,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740685723] [2021-05-02 17:47:59,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 17:47:59,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:47:59,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 17:47:59,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-05-02 17:47:59,713 INFO L87 Difference]: Start difference. First operand 457 states and 545 transitions. Second operand has 30 states, 29 states have (on average 2.8620689655172415) internal successors, (83), 27 states have internal predecessors, (83), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 17:48:37,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:48:37,604 INFO L93 Difference]: Finished difference Result 596 states and 713 transitions. [2021-05-02 17:48:37,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 17:48:37,605 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.8620689655172415) internal successors, (83), 27 states have internal predecessors, (83), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 62 [2021-05-02 17:48:37,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:48:37,607 INFO L225 Difference]: With dead ends: 596 [2021-05-02 17:48:37,607 INFO L226 Difference]: Without dead ends: 596 [2021-05-02 17:48:37,607 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 54 SyntacticMatches, 8 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1817.8ms TimeCoverageRelationStatistics Valid=314, Invalid=2136, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 17:48:37,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-05-02 17:48:37,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 466. [2021-05-02 17:48:37,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 444 states have (on average 1.2027027027027026) internal successors, (534), 447 states have internal predecessors, (534), 12 states have call successors, (12), 10 states have call predecessors, (12), 9 states have return successors, (11), 8 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 17:48:37,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 557 transitions. [2021-05-02 17:48:37,614 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 557 transitions. Word has length 62 [2021-05-02 17:48:37,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:48:37,615 INFO L480 AbstractCegarLoop]: Abstraction has 466 states and 557 transitions. [2021-05-02 17:48:37,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 29 states have (on average 2.8620689655172415) internal successors, (83), 27 states have internal predecessors, (83), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 17:48:37,615 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 557 transitions. [2021-05-02 17:48:37,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 17:48:37,616 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:48:37,616 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:48:37,833 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:48:37,834 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:48:37,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:48:37,834 INFO L82 PathProgramCache]: Analyzing trace with hash 122864157, now seen corresponding path program 3 times [2021-05-02 17:48:37,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:48:37,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311681429] [2021-05-02 17:48:37,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:48:37,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:48:37,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:48:37,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:48:37,908 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 66 proven. 7 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-05-02 17:48:37,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:48:37,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311681429] [2021-05-02 17:48:37,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311681429] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:48:37,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875400330] [2021-05-02 17:48:37,909 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:48:38,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 17:48:38,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:48:38,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 17:48:38,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:48:38,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:38,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-05-02 17:48:38,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:48:38,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:48:38,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:48:38,308 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:30 [2021-05-02 17:48:38,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:38,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:38,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:38,667 INFO L354 Elim1Store]: treesize reduction 61, result has 29.9 percent of original size [2021-05-02 17:48:38,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 48 treesize of output 67 [2021-05-02 17:48:38,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:48:38,697 INFO L628 ElimStorePlain]: treesize reduction 8, result has 87.5 percent of original size [2021-05-02 17:48:38,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-05-02 17:48:38,700 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:60, output treesize:53 [2021-05-02 17:48:38,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:38,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:38,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-02 17:48:38,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-02 17:48:38,856 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:48:38,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 16 [2021-05-02 17:48:38,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:48:38,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:48:38,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:48:38,863 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:3 [2021-05-02 17:48:38,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:38,941 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 42 proven. 18 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-02 17:48:38,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875400330] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:48:38,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:48:38,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 18] total 25 [2021-05-02 17:48:38,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222750652] [2021-05-02 17:48:38,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 17:48:38,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:48:38,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 17:48:38,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-05-02 17:48:38,942 INFO L87 Difference]: Start difference. First operand 466 states and 557 transitions. Second operand has 25 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 23 states have internal predecessors, (76), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:48:42,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:48:42,036 INFO L93 Difference]: Finished difference Result 702 states and 845 transitions. [2021-05-02 17:48:42,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-02 17:48:42,037 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 23 states have internal predecessors, (76), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2021-05-02 17:48:42,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:48:42,039 INFO L225 Difference]: With dead ends: 702 [2021-05-02 17:48:42,039 INFO L226 Difference]: Without dead ends: 702 [2021-05-02 17:48:42,040 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 2468.2ms TimeCoverageRelationStatistics Valid=852, Invalid=3840, Unknown=0, NotChecked=0, Total=4692 [2021-05-02 17:48:42,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-05-02 17:48:42,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 402. [2021-05-02 17:48:42,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 380 states have (on average 1.1894736842105262) internal successors, (452), 383 states have internal predecessors, (452), 12 states have call successors, (12), 10 states have call predecessors, (12), 9 states have return successors, (11), 8 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 17:48:42,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 475 transitions. [2021-05-02 17:48:42,047 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 475 transitions. Word has length 60 [2021-05-02 17:48:42,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:48:42,047 INFO L480 AbstractCegarLoop]: Abstraction has 402 states and 475 transitions. [2021-05-02 17:48:42,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 23 states have internal predecessors, (76), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:48:42,048 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 475 transitions. [2021-05-02 17:48:42,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 17:48:42,048 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:48:42,049 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:48:42,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-05-02 17:48:42,250 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:48:42,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:48:42,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1332456625, now seen corresponding path program 4 times [2021-05-02 17:48:42,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:48:42,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957447378] [2021-05-02 17:48:42,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:48:42,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:48:42,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:48:42,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:48:42,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-05-02 17:48:42,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:48:42,430 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 2 proven. 58 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-02 17:48:42,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:48:42,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957447378] [2021-05-02 17:48:42,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957447378] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:48:42,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254270835] [2021-05-02 17:48:42,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:48:42,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:48:42,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:48:42,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 17:48:42,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:48:42,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:42,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:42,725 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 17:48:42,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254270835] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:48:42,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:48:42,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 17 [2021-05-02 17:48:42,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923547541] [2021-05-02 17:48:42,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 17:48:42,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:48:42,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 17:48:42,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-05-02 17:48:42,727 INFO L87 Difference]: Start difference. First operand 402 states and 475 transitions. Second operand has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 16 states have internal predecessors, (71), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:48:43,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:48:43,156 INFO L93 Difference]: Finished difference Result 540 states and 634 transitions. [2021-05-02 17:48:43,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 17:48:43,156 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 16 states have internal predecessors, (71), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 61 [2021-05-02 17:48:43,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:48:43,158 INFO L225 Difference]: With dead ends: 540 [2021-05-02 17:48:43,158 INFO L226 Difference]: Without dead ends: 540 [2021-05-02 17:48:43,158 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 270.1ms TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-05-02 17:48:43,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-05-02 17:48:43,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 367. [2021-05-02 17:48:43,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 355 states have (on average 1.1830985915492958) internal successors, (420), 356 states have internal predecessors, (420), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 17:48:43,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 431 transitions. [2021-05-02 17:48:43,163 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 431 transitions. Word has length 61 [2021-05-02 17:48:43,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:48:43,163 INFO L480 AbstractCegarLoop]: Abstraction has 367 states and 431 transitions. [2021-05-02 17:48:43,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 16 states have internal predecessors, (71), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:48:43,163 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 431 transitions. [2021-05-02 17:48:43,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-02 17:48:43,164 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:48:43,164 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 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 17:48:43,377 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-05-02 17:48:43,377 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:48:43,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:48:43,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1972399736, now seen corresponding path program 2 times [2021-05-02 17:48:43,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:48:43,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535747069] [2021-05-02 17:48:43,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:48:43,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:48:43,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:48:43,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:48:43,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-05-02 17:48:43,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:48:43,874 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 2 proven. 75 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 17:48:43,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:48:43,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535747069] [2021-05-02 17:48:43,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535747069] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:48:43,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319893008] [2021-05-02 17:48:43,875 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:48:43,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:48:43,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:48:43,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 17:48:43,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:48:44,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-02 17:48:44,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:48:44,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:48:44,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:48:44,104 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:31, output treesize:10 [2021-05-02 17:48:44,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:44,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-05-02 17:48:44,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:48:44,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:48:44,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:48:44,161 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:30 [2021-05-02 17:48:44,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2021-05-02 17:48:44,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:44,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:44,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:44,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:44,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:44,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:44,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:44,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:44,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 34 [2021-05-02 17:48:44,265 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-02 17:48:44,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:48:44,270 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:48:44,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:48:44,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:48:44,283 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:32 [2021-05-02 17:48:44,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:44,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:44,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:44,360 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:48:44,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-05-02 17:48:44,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:48:44,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:48:44,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:48:44,371 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:19 [2021-05-02 17:48:44,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,622 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:48:44,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-05-02 17:48:44,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:48:44,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:48:44,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:48:44,626 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:3 [2021-05-02 17:48:44,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,679 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-05-02 17:48:44,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319893008] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:48:44,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:48:44,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 26] total 32 [2021-05-02 17:48:44,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26998431] [2021-05-02 17:48:44,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 17:48:44,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:48:44,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 17:48:44,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=870, Unknown=0, NotChecked=0, Total=992 [2021-05-02 17:48:44,680 INFO L87 Difference]: Start difference. First operand 367 states and 431 transitions. Second operand has 32 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 28 states have internal predecessors, (73), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:49:18,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:49:18,745 INFO L93 Difference]: Finished difference Result 532 states and 623 transitions. [2021-05-02 17:49:18,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-02 17:49:18,746 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 28 states have internal predecessors, (73), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 62 [2021-05-02 17:49:18,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:49:18,747 INFO L225 Difference]: With dead ends: 532 [2021-05-02 17:49:18,747 INFO L226 Difference]: Without dead ends: 532 [2021-05-02 17:49:18,748 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 48 SyntacticMatches, 13 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1373 ImplicationChecksByTransitivity, 1758.9ms TimeCoverageRelationStatistics Valid=502, Invalid=3788, Unknown=0, NotChecked=0, Total=4290 [2021-05-02 17:49:18,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-05-02 17:49:18,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 425. [2021-05-02 17:49:18,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 406 states have (on average 1.1748768472906403) internal successors, (477), 409 states have internal predecessors, (477), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 17:49:18,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 496 transitions. [2021-05-02 17:49:18,754 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 496 transitions. Word has length 62 [2021-05-02 17:49:18,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:49:18,754 INFO L480 AbstractCegarLoop]: Abstraction has 425 states and 496 transitions. [2021-05-02 17:49:18,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 28 states have internal predecessors, (73), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:49:18,755 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 496 transitions. [2021-05-02 17:49:18,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-02 17:49:18,755 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:49:18,755 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:49:18,972 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-05-02 17:49:18,973 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:49:18,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:49:18,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1135644622, now seen corresponding path program 6 times [2021-05-02 17:49:18,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:49:18,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131917073] [2021-05-02 17:49:18,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:49:18,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:49:19,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:49:19,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:49:19,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-05-02 17:49:19,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:49:19,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-05-02 17:49:19,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:49:19,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-05-02 17:49:19,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:49:19,232 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 9 proven. 31 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-05-02 17:49:19,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:49:19,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131917073] [2021-05-02 17:49:19,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131917073] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:49:19,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133630834] [2021-05-02 17:49:19,233 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:49:19,445 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-02 17:49:19,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:49:19,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 17:49:19,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:49:19,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:19,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:19,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:19,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:19,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:19,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:19,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:19,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:19,807 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 9 proven. 31 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-05-02 17:49:19,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133630834] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:49:19,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:49:19,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 16 [2021-05-02 17:49:19,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700366004] [2021-05-02 17:49:19,808 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 17:49:19,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:49:19,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 17:49:19,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-02 17:49:19,809 INFO L87 Difference]: Start difference. First operand 425 states and 496 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 17:49:20,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:49:20,200 INFO L93 Difference]: Finished difference Result 554 states and 656 transitions. [2021-05-02 17:49:20,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 17:49:20,200 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 65 [2021-05-02 17:49:20,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:49:20,202 INFO L225 Difference]: With dead ends: 554 [2021-05-02 17:49:20,202 INFO L226 Difference]: Without dead ends: 510 [2021-05-02 17:49:20,202 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 430.2ms TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-05-02 17:49:20,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-05-02 17:49:20,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 380. [2021-05-02 17:49:20,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 363 states have (on average 1.1763085399449036) internal successors, (427), 367 states have internal predecessors, (427), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 17:49:20,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 447 transitions. [2021-05-02 17:49:20,217 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 447 transitions. Word has length 65 [2021-05-02 17:49:20,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:49:20,218 INFO L480 AbstractCegarLoop]: Abstraction has 380 states and 447 transitions. [2021-05-02 17:49:20,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 17:49:20,218 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 447 transitions. [2021-05-02 17:49:20,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 17:49:20,233 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:49:20,234 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:49:20,434 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:49:20,434 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:49:20,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:49:20,435 INFO L82 PathProgramCache]: Analyzing trace with hash 469150570, now seen corresponding path program 1 times [2021-05-02 17:49:20,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:49:20,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170889605] [2021-05-02 17:49:20,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:49:20,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:49:23,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:49:23,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:49:23,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-05-02 17:49:23,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:49:23,156 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 8 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:49:23,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:49:23,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170889605] [2021-05-02 17:49:23,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170889605] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:49:23,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602877588] [2021-05-02 17:49:23,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:49:23,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:49:23,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-02 17:49:23,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:49:23,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:23,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:23,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:23,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:23,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:23,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:23,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:23,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:49:23,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-05-02 17:49:23,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:49:23,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:49:23,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:23,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:49:23,441 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:40 [2021-05-02 17:49:23,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:23,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:23,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:23,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:23,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:23,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:23,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:23,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:49:23,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:49:23,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:49:23,642 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:49:23,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2021-05-02 17:49:23,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:49:23,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:49:23,658 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:49:23,659 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:20 [2021-05-02 17:49:23,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:23,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:23,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:23,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:49:23,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:49:23,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:49:23,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:49:23,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:49:23,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-02 17:49:23,954 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-05-02 17:49:23,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 43 [2021-05-02 17:49:23,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:49:23,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:49:23,979 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:49:23,980 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:40 [2021-05-02 17:49:24,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:24,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:24,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:24,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:24,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:24,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:24,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:24,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:49:24,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:49:24,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:49:24,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-02 17:49:24,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:49:24,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:49:24,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-02 17:49:24,504 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-05-02 17:49:24,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 55 [2021-05-02 17:49:24,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:49:24,538 INFO L628 ElimStorePlain]: treesize reduction 18, result has 70.5 percent of original size [2021-05-02 17:49:24,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:24,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:49:24,543 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:62, output treesize:43 [2021-05-02 17:49:24,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:24,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:24,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:24,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:24,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:24,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:24,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:24,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:24,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:24,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:24,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:24,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:25,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:25,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:25,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:25,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:25,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:25,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:25,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:25,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:25,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:25,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:25,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:25,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:25,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:25,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:25,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:25,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:25,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:25,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:25,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:25,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:25,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:25,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:25,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:25,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:25,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:25,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:49:25,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:49:25,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:49:25,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-02 17:49:25,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:49:25,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:49:25,319 INFO L354 Elim1Store]: treesize reduction 66, result has 23.3 percent of original size [2021-05-02 17:49:25,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 50 treesize of output 59 [2021-05-02 17:49:25,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:49:25,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:49:25,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:25,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:25,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:25,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:25,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:25,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:25,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:49:25,396 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:62, output treesize:62 [2021-05-02 17:49:25,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:25,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:25,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:25,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:25,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:25,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:25,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:25,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:25,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:25,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:37,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:37,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:37,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:37,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:37,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:38,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:38,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:38,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:38,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:38,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:38,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:38,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:38,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:38,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:38,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:38,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:38,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:38,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:38,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:38,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:38,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:38,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:38,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:38,492 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:49:38,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-05-02 17:49:38,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:49:38,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:49:38,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:49:38,501 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:3 [2021-05-02 17:49:38,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:38,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:38,693 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 17:49:38,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602877588] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:49:38,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:49:38,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 30] total 52 [2021-05-02 17:49:38,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121918103] [2021-05-02 17:49:38,694 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-02 17:49:38,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:49:38,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-02 17:49:38,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=2372, Unknown=2, NotChecked=0, Total=2652 [2021-05-02 17:49:38,695 INFO L87 Difference]: Start difference. First operand 380 states and 447 transitions. Second operand has 52 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 48 states have internal predecessors, (97), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:50:45,839 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-05-02 17:50:50,292 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48