/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/sumt9.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 19:03:04,814 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 19:03:04,816 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 19:03:04,855 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 19:03:04,927 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 19:03:04,927 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 19:03:04,928 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 19:03:04,932 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 19:03:04,950 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 19:03:04,950 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 19:03:04,953 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 19:03:04,953 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 19:03:04,953 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 19:03:04,953 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 19:03:04,954 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 19:03:04,954 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 19:03:04,954 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 19:03:04,954 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 19:03:04,955 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 19:03:04,955 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 19:03:04,955 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 19:03:04,955 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 19:03:04,956 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 19:03:04,956 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 19:03:04,956 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 19:03:04,956 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 19:03:04,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:03:04,956 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 19:03:04,956 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 19:03:04,957 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 19:03:04,957 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 19:03:05,275 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 19:03:05,300 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 19:03:05,302 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 19:03:05,303 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 19:03:05,304 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 19:03:05,305 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt9.c [2021-05-02 19:03:05,354 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/230666804/8ebccc6b66c44426a9647fc46d46610e/FLAG45fb8e694 [2021-05-02 19:03:05,766 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 19:03:05,766 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt9.c [2021-05-02 19:03:05,774 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/230666804/8ebccc6b66c44426a9647fc46d46610e/FLAG45fb8e694 [2021-05-02 19:03:06,174 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/230666804/8ebccc6b66c44426a9647fc46d46610e [2021-05-02 19:03:06,177 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 19:03:06,178 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 19:03:06,197 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 19:03:06,197 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 19:03:06,200 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 19:03:06,201 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:03:06" (1/1) ... [2021-05-02 19:03:06,202 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25263646 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:03:06, skipping insertion in model container [2021-05-02 19:03:06,202 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:03:06" (1/1) ... [2021-05-02 19:03:06,207 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 19:03:06,222 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 19:03:06,329 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt9.c[403,416] [2021-05-02 19:03:06,345 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:03:06,352 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 19:03:06,360 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt9.c[403,416] [2021-05-02 19:03:06,370 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:03:06,382 INFO L208 MainTranslator]: Completed translation [2021-05-02 19:03:06,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:03:06 WrapperNode [2021-05-02 19:03:06,383 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 19:03:06,384 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 19:03:06,384 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 19:03:06,384 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 19:03:06,431 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:03:06" (1/1) ... [2021-05-02 19:03:06,431 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:03:06" (1/1) ... [2021-05-02 19:03:06,437 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:03:06" (1/1) ... [2021-05-02 19:03:06,437 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:03:06" (1/1) ... [2021-05-02 19:03:06,442 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:03:06" (1/1) ... [2021-05-02 19:03:06,445 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:03:06" (1/1) ... [2021-05-02 19:03:06,446 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:03:06" (1/1) ... [2021-05-02 19:03:06,448 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 19:03:06,449 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 19:03:06,449 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 19:03:06,449 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 19:03:06,450 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:03:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:03:06,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 19:03:06,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 19:03:06,537 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 19:03:06,537 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 19:03:06,537 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 19:03:06,537 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 19:03:06,537 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 19:03:06,537 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 19:03:06,537 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 19:03:06,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 19:03:06,537 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 19:03:06,538 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 19:03:06,538 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 19:03:06,538 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 19:03:06,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 19:03:06,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 19:03:06,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 19:03:06,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 19:03:06,538 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 19:03:06,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 19:03:06,814 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 19:03:06,815 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 19:03:06,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:03:06 BoogieIcfgContainer [2021-05-02 19:03:06,816 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 19:03:06,817 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 19:03:06,817 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 19:03:06,817 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 19:03:06,820 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:03:06" (1/1) ... [2021-05-02 19:03:06,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:03:06 BasicIcfg [2021-05-02 19:03:06,834 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 19:03:06,836 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 19:03:06,836 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 19:03:06,838 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 19:03:06,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 07:03:06" (1/4) ... [2021-05-02 19:03:06,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42381e3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:03:06, skipping insertion in model container [2021-05-02 19:03:06,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:03:06" (2/4) ... [2021-05-02 19:03:06,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42381e3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:03:06, skipping insertion in model container [2021-05-02 19:03:06,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:03:06" (3/4) ... [2021-05-02 19:03:06,840 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42381e3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:03:06, skipping insertion in model container [2021-05-02 19:03:06,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:03:06" (4/4) ... [2021-05-02 19:03:06,841 INFO L111 eAbstractionObserver]: Analyzing ICFG sumt9.cJordan [2021-05-02 19:03:06,846 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 19:03:06,849 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 19:03:06,864 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 19:03:06,900 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 19:03:06,900 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 19:03:06,916 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 19:03:06,917 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 19:03:06,917 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 19:03:06,917 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 19:03:06,917 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 19:03:06,917 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 19:03:06,928 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 21 states have (on average 1.619047619047619) internal successors, (34), 23 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 19:03:06,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 19:03:06,934 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:03:06,934 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:03:06,935 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:03:06,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:03:06,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1179910541, now seen corresponding path program 1 times [2021-05-02 19:03:06,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:03:06,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197995436] [2021-05-02 19:03:06,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:03:07,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:07,439 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-05-02 19:03:07,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:03:07,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:07,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:03:07,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:03:07,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197995436] [2021-05-02 19:03:07,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197995436] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:03:07,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:03:07,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 19:03:07,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201916997] [2021-05-02 19:03:07,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:03:07,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:03:07,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:03:07,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:03:07,558 INFO L87 Difference]: Start difference. First operand has 29 states, 21 states have (on average 1.619047619047619) internal successors, (34), 23 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:03:08,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:03:08,225 INFO L93 Difference]: Finished difference Result 52 states and 71 transitions. [2021-05-02 19:03:08,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:03:08,227 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-02 19:03:08,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:03:08,237 INFO L225 Difference]: With dead ends: 52 [2021-05-02 19:03:08,238 INFO L226 Difference]: Without dead ends: 41 [2021-05-02 19:03:08,241 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 534.9ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-05-02 19:03:08,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-02 19:03:08,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2021-05-02 19:03:08,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.375) internal successors, (33), 25 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 19:03:08,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2021-05-02 19:03:08,275 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 14 [2021-05-02 19:03:08,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:03:08,275 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2021-05-02 19:03:08,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:03:08,276 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2021-05-02 19:03:08,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 19:03:08,277 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:03:08,277 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:03:08,277 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 19:03:08,278 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:03:08,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:03:08,279 INFO L82 PathProgramCache]: Analyzing trace with hash -476840831, now seen corresponding path program 1 times [2021-05-02 19:03:08,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:03:08,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230426448] [2021-05-02 19:03:08,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:03:08,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:08,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:03:08,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:08,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-02 19:03:08,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:08,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:03:08,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:03:08,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230426448] [2021-05-02 19:03:08,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230426448] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:03:08,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442843025] [2021-05-02 19:03:08,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:03:08,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:08,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 19:03:08,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:03:08,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:03:08,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442843025] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:03:08,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 19:03:08,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11] total 14 [2021-05-02 19:03:08,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847824938] [2021-05-02 19:03:08,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 19:03:08,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:03:08,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 19:03:08,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-02 19:03:08,974 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 19:03:09,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:03:09,583 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2021-05-02 19:03:09,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 19:03:09,584 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 22 [2021-05-02 19:03:09,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:03:09,585 INFO L225 Difference]: With dead ends: 42 [2021-05-02 19:03:09,585 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 19:03:09,586 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 589.6ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-05-02 19:03:09,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 19:03:09,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-05-02 19:03:09,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 19:03:09,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-05-02 19:03:09,591 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 22 [2021-05-02 19:03:09,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:03:09,592 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-05-02 19:03:09,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 19:03:09,592 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-05-02 19:03:09,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 19:03:09,593 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:03:09,593 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:03:09,805 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 19:03:09,805 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:03:09,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:03:09,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1164772623, now seen corresponding path program 1 times [2021-05-02 19:03:09,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:03:09,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047505340] [2021-05-02 19:03:09,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:03:09,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:10,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:03:10,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:10,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-02 19:03:10,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:10,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:03:10,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:03:10,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047505340] [2021-05-02 19:03:10,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047505340] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:03:10,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779861457] [2021-05-02 19:03:10,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:03:10,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:10,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 19:03:10,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:03:10,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:10,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:10,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:10,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:10,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:10,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:03:10,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779861457] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:03:10,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 19:03:10,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-05-02 19:03:10,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713788438] [2021-05-02 19:03:10,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 19:03:10,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:03:10,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 19:03:10,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-02 19:03:10,618 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 16 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 19:03:11,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:03:11,369 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2021-05-02 19:03:11,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 19:03:11,370 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2021-05-02 19:03:11,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:03:11,373 INFO L225 Difference]: With dead ends: 56 [2021-05-02 19:03:11,374 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 19:03:11,375 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 768.9ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-05-02 19:03:11,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 19:03:11,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-02 19:03:11,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 46 states have internal predecessors, (55), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 19:03:11,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2021-05-02 19:03:11,395 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 29 [2021-05-02 19:03:11,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:03:11,396 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2021-05-02 19:03:11,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 19:03:11,396 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2021-05-02 19:03:11,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 19:03:11,400 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:03:11,401 INFO L523 BasicCegarLoop]: trace histogram [3, 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] [2021-05-02 19:03:11,609 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:03:11,609 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:03:11,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:03:11,610 INFO L82 PathProgramCache]: Analyzing trace with hash 2112723540, now seen corresponding path program 1 times [2021-05-02 19:03:11,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:03:11,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186605783] [2021-05-02 19:03:11,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:03:11,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:12,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:03:12,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:12,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-02 19:03:12,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:12,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-05-02 19:03:12,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:12,065 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 19:03:12,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:03:12,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186605783] [2021-05-02 19:03:12,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186605783] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:03:12,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208938365] [2021-05-02 19:03:12,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:03:12,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:12,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-02 19:03:12,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:03:12,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:12,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:12,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:12,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:12,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:12,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:12,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:12,521 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 19:03:12,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208938365] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:03:12,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 19:03:12,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-05-02 19:03:12,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165550472] [2021-05-02 19:03:12,522 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 19:03:12,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:03:12,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 19:03:12,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-05-02 19:03:12,523 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 20 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 7 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 19:03:13,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:03:13,413 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2021-05-02 19:03:13,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 19:03:13,414 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 7 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 44 [2021-05-02 19:03:13,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:03:13,415 INFO L225 Difference]: With dead ends: 70 [2021-05-02 19:03:13,415 INFO L226 Difference]: Without dead ends: 70 [2021-05-02 19:03:13,416 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 985.4ms TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-05-02 19:03:13,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-05-02 19:03:13,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-05-02 19:03:13,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 58 states have internal predecessors, (67), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 19:03:13,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2021-05-02 19:03:13,421 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 44 [2021-05-02 19:03:13,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:03:13,422 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2021-05-02 19:03:13,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 7 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 19:03:13,422 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2021-05-02 19:03:13,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 19:03:13,423 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:03:13,424 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:03:13,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:03:13,649 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:03:13,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:03:13,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1306987143, now seen corresponding path program 1 times [2021-05-02 19:03:13,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:03:13,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665406284] [2021-05-02 19:03:13,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:03:13,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:14,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:03:14,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:14,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-02 19:03:14,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:14,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-05-02 19:03:14,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:14,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-05-02 19:03:14,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:14,137 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 43 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 19:03:14,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:03:14,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665406284] [2021-05-02 19:03:14,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665406284] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:03:14,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706565058] [2021-05-02 19:03:14,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:03:14,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:14,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 19:03:14,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:03:14,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:14,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:14,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:14,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:14,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:14,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:14,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:14,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:14,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:14,701 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 19:03:14,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706565058] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:03:14,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 19:03:14,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2021-05-02 19:03:14,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530782008] [2021-05-02 19:03:14,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 19:03:14,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:03:14,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 19:03:14,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-05-02 19:03:14,705 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand has 24 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 22 states have internal predecessors, (78), 9 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 19:03:15,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:03:15,878 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2021-05-02 19:03:15,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 19:03:15,879 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 22 states have internal predecessors, (78), 9 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 58 [2021-05-02 19:03:15,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:03:15,880 INFO L225 Difference]: With dead ends: 83 [2021-05-02 19:03:15,880 INFO L226 Difference]: Without dead ends: 83 [2021-05-02 19:03:15,881 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 1234.0ms TimeCoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 19:03:15,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-05-02 19:03:15,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-05-02 19:03:15,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 69 states have (on average 1.1304347826086956) internal successors, (78), 69 states have internal predecessors, (78), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 19:03:15,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2021-05-02 19:03:15,888 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 58 [2021-05-02 19:03:15,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:03:15,888 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2021-05-02 19:03:15,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 22 states have internal predecessors, (78), 9 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 19:03:15,889 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2021-05-02 19:03:15,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-02 19:03:15,890 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:03:15,890 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:03:16,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:03:16,105 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:03:16,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:03:16,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1052606164, now seen corresponding path program 1 times [2021-05-02 19:03:16,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:03:16,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151537449] [2021-05-02 19:03:16,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:03:16,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:16,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:03:16,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:16,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-02 19:03:16,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:16,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-05-02 19:03:16,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:16,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-05-02 19:03:16,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:16,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-05-02 19:03:16,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:16,572 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 8 proven. 74 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 19:03:16,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:03:16,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151537449] [2021-05-02 19:03:16,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151537449] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:03:16,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496879669] [2021-05-02 19:03:16,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:03:16,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:16,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-02 19:03:16,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:03:16,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:16,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:16,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:16,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:16,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:16,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:17,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:17,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:17,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:17,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:17,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:17,237 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 84 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 19:03:17,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496879669] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:03:17,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 19:03:17,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-05-02 19:03:17,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549133115] [2021-05-02 19:03:17,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 19:03:17,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:03:17,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 19:03:17,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-05-02 19:03:17,239 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand has 28 states, 26 states have (on average 3.6153846153846154) internal successors, (94), 26 states have internal predecessors, (94), 11 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 19:03:18,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:03:18,753 INFO L93 Difference]: Finished difference Result 95 states and 103 transitions. [2021-05-02 19:03:18,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 19:03:18,754 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 3.6153846153846154) internal successors, (94), 26 states have internal predecessors, (94), 11 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 71 [2021-05-02 19:03:18,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:03:18,758 INFO L225 Difference]: With dead ends: 95 [2021-05-02 19:03:18,758 INFO L226 Difference]: Without dead ends: 95 [2021-05-02 19:03:18,760 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 1419.7ms TimeCoverageRelationStatistics Valid=210, Invalid=1596, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 19:03:18,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-02 19:03:18,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-05-02 19:03:18,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 79 states have (on average 1.1139240506329113) internal successors, (88), 79 states have internal predecessors, (88), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 19:03:18,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 103 transitions. [2021-05-02 19:03:18,767 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 103 transitions. Word has length 71 [2021-05-02 19:03:18,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:03:18,768 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 103 transitions. [2021-05-02 19:03:18,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 26 states have (on average 3.6153846153846154) internal successors, (94), 26 states have internal predecessors, (94), 11 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 19:03:18,768 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 103 transitions. [2021-05-02 19:03:18,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-05-02 19:03:18,769 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:03:18,769 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:03:18,970 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:03:18,970 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:03:18,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:03:18,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1579896915, now seen corresponding path program 1 times [2021-05-02 19:03:18,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:03:18,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675482573] [2021-05-02 19:03:18,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:03:19,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:19,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:03:19,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:19,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-02 19:03:19,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:19,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-05-02 19:03:19,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:19,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-05-02 19:03:19,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:19,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-05-02 19:03:19,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:19,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-05-02 19:03:19,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:19,523 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 10 proven. 110 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 19:03:19,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:03:19,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675482573] [2021-05-02 19:03:19,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675482573] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:03:19,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035097079] [2021-05-02 19:03:19,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:03:19,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:19,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 55 conjunts are in the unsatisfiable core [2021-05-02 19:03:19,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:03:19,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:19,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:19,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:19,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:19,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:19,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:20,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:20,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:20,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:20,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:20,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:20,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:20,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:20,334 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 9 proven. 123 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 19:03:20,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035097079] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:03:20,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 19:03:20,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 32 [2021-05-02 19:03:20,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896158904] [2021-05-02 19:03:20,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 19:03:20,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:03:20,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 19:03:20,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2021-05-02 19:03:20,337 INFO L87 Difference]: Start difference. First operand 95 states and 103 transitions. Second operand has 32 states, 30 states have (on average 3.6) internal successors, (108), 30 states have internal predecessors, (108), 13 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 19:03:21,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:03:21,850 INFO L93 Difference]: Finished difference Result 106 states and 114 transitions. [2021-05-02 19:03:21,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 19:03:21,851 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 3.6) internal successors, (108), 30 states have internal predecessors, (108), 13 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 83 [2021-05-02 19:03:21,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:03:21,853 INFO L225 Difference]: With dead ends: 106 [2021-05-02 19:03:21,853 INFO L226 Difference]: Without dead ends: 106 [2021-05-02 19:03:21,854 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 1621.2ms TimeCoverageRelationStatistics Valid=261, Invalid=2091, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 19:03:21,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-02 19:03:21,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-05-02 19:03:21,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 88 states have (on average 1.1022727272727273) internal successors, (97), 88 states have internal predecessors, (97), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 19:03:21,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 114 transitions. [2021-05-02 19:03:21,873 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 114 transitions. Word has length 83 [2021-05-02 19:03:21,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:03:21,875 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 114 transitions. [2021-05-02 19:03:21,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 30 states have (on average 3.6) internal successors, (108), 30 states have internal predecessors, (108), 13 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 19:03:21,875 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 114 transitions. [2021-05-02 19:03:21,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-02 19:03:21,878 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:03:21,878 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:03:22,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:03:22,093 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:03:22,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:03:22,094 INFO L82 PathProgramCache]: Analyzing trace with hash 675307799, now seen corresponding path program 1 times [2021-05-02 19:03:22,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:03:22,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851371761] [2021-05-02 19:03:22,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:03:22,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:22,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:03:22,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:22,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-02 19:03:22,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:22,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-05-02 19:03:22,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:22,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-05-02 19:03:22,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:22,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-05-02 19:03:22,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:22,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-05-02 19:03:22,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:22,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-05-02 19:03:22,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:22,744 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 12 proven. 149 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 19:03:22,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:03:22,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851371761] [2021-05-02 19:03:22,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851371761] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:03:22,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601516306] [2021-05-02 19:03:22,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:03:22,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:22,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 59 conjunts are in the unsatisfiable core [2021-05-02 19:03:22,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:03:22,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:22,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:23,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:23,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:23,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:23,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:23,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:23,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:23,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:23,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:23,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:23,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:23,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:23,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:23,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:23,640 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 11 proven. 165 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-02 19:03:23,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601516306] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:03:23,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 19:03:23,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-05-02 19:03:23,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191937105] [2021-05-02 19:03:23,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 19:03:23,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:03:23,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 19:03:23,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1091, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 19:03:23,643 INFO L87 Difference]: Start difference. First operand 106 states and 114 transitions. Second operand has 36 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 34 states have internal predecessors, (120), 15 states have call successors, (17), 4 states have call predecessors, (17), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 19:03:25,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:03:25,568 INFO L93 Difference]: Finished difference Result 116 states and 124 transitions. [2021-05-02 19:03:25,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 19:03:25,569 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 34 states have internal predecessors, (120), 15 states have call successors, (17), 4 states have call predecessors, (17), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 94 [2021-05-02 19:03:25,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:03:25,570 INFO L225 Difference]: With dead ends: 116 [2021-05-02 19:03:25,570 INFO L226 Difference]: Without dead ends: 116 [2021-05-02 19:03:25,571 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 1871.0ms TimeCoverageRelationStatistics Valid=318, Invalid=2652, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 19:03:25,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-02 19:03:25,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2021-05-02 19:03:25,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 96 states have (on average 1.09375) internal successors, (105), 96 states have internal predecessors, (105), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 19:03:25,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 124 transitions. [2021-05-02 19:03:25,577 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 124 transitions. Word has length 94 [2021-05-02 19:03:25,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:03:25,577 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 124 transitions. [2021-05-02 19:03:25,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 34 states have internal predecessors, (120), 15 states have call successors, (17), 4 states have call predecessors, (17), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 19:03:25,578 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 124 transitions. [2021-05-02 19:03:25,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-02 19:03:25,579 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:03:25,579 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:03:25,788 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:03:25,789 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:03:25,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:03:25,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1444310818, now seen corresponding path program 1 times [2021-05-02 19:03:25,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:03:25,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757833139] [2021-05-02 19:03:25,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:03:25,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:26,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:03:26,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:26,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-02 19:03:26,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:26,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-05-02 19:03:26,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:26,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-05-02 19:03:26,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:26,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-05-02 19:03:26,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:26,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-05-02 19:03:26,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:26,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-05-02 19:03:26,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:26,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-05-02 19:03:26,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:26,402 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 14 proven. 189 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-05-02 19:03:26,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:03:26,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757833139] [2021-05-02 19:03:26,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757833139] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:03:26,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842366456] [2021-05-02 19:03:26,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:03:26,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:26,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 63 conjunts are in the unsatisfiable core [2021-05-02 19:03:26,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:03:26,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:26,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:26,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:26,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:26,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:26,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:26,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:26,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:26,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:26,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:27,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:27,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:27,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:27,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:27,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:27,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:27,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:27,373 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 13 proven. 208 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-02 19:03:27,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842366456] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:03:27,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 19:03:27,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 40 [2021-05-02 19:03:27,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121952754] [2021-05-02 19:03:27,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-02 19:03:27,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:03:27,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-02 19:03:27,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1353, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 19:03:27,376 INFO L87 Difference]: Start difference. First operand 116 states and 124 transitions. Second operand has 40 states, 38 states have (on average 3.4210526315789473) internal successors, (130), 38 states have internal predecessors, (130), 17 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 19:03:29,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:03:29,440 INFO L93 Difference]: Finished difference Result 125 states and 133 transitions. [2021-05-02 19:03:29,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 19:03:29,440 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 3.4210526315789473) internal successors, (130), 38 states have internal predecessors, (130), 17 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 104 [2021-05-02 19:03:29,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:03:29,441 INFO L225 Difference]: With dead ends: 125 [2021-05-02 19:03:29,441 INFO L226 Difference]: Without dead ends: 125 [2021-05-02 19:03:29,442 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 102 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 2125.2ms TimeCoverageRelationStatistics Valid=381, Invalid=3279, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 19:03:29,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-05-02 19:03:29,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-05-02 19:03:29,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 103 states have (on average 1.087378640776699) internal successors, (112), 103 states have internal predecessors, (112), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 19:03:29,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 133 transitions. [2021-05-02 19:03:29,446 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 133 transitions. Word has length 104 [2021-05-02 19:03:29,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:03:29,447 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 133 transitions. [2021-05-02 19:03:29,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 38 states have (on average 3.4210526315789473) internal successors, (130), 38 states have internal predecessors, (130), 17 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 19:03:29,447 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 133 transitions. [2021-05-02 19:03:29,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-02 19:03:29,448 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:03:29,448 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 7, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:03:29,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 19:03:29,661 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:03:29,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:03:29,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1612522293, now seen corresponding path program 1 times [2021-05-02 19:03:29,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:03:29,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335893398] [2021-05-02 19:03:29,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:03:29,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:30,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:03:30,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:30,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-02 19:03:30,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:30,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-05-02 19:03:30,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:30,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-05-02 19:03:30,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:30,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-05-02 19:03:30,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:30,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-05-02 19:03:30,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:30,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-05-02 19:03:30,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:30,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-05-02 19:03:30,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:30,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-05-02 19:03:30,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:30,347 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 16 proven. 228 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-05-02 19:03:30,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:03:30,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335893398] [2021-05-02 19:03:30,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335893398] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:03:30,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714370087] [2021-05-02 19:03:30,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:03:30,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:30,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 67 conjunts are in the unsatisfiable core [2021-05-02 19:03:30,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:03:30,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:30,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:30,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:30,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:30,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:30,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:30,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:30,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:30,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:30,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:31,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:31,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:31,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:31,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:31,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:31,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:31,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:31,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:31,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:03:31,433 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 15 proven. 250 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-05-02 19:03:31,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714370087] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:03:31,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 19:03:31,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 44 [2021-05-02 19:03:31,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132612740] [2021-05-02 19:03:31,435 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-02 19:03:31,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:03:31,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-02 19:03:31,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1643, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 19:03:31,436 INFO L87 Difference]: Start difference. First operand 125 states and 133 transitions. Second operand has 44 states, 42 states have (on average 3.2857142857142856) internal successors, (138), 42 states have internal predecessors, (138), 19 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 19:03:33,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:03:33,429 INFO L93 Difference]: Finished difference Result 144 states and 161 transitions. [2021-05-02 19:03:33,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 19:03:33,430 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 3.2857142857142856) internal successors, (138), 42 states have internal predecessors, (138), 19 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 113 [2021-05-02 19:03:33,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:03:33,431 INFO L225 Difference]: With dead ends: 144 [2021-05-02 19:03:33,431 INFO L226 Difference]: Without dead ends: 144 [2021-05-02 19:03:33,432 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1409 ImplicationChecksByTransitivity, 2443.4ms TimeCoverageRelationStatistics Valid=477, Invalid=4215, Unknown=0, NotChecked=0, Total=4692 [2021-05-02 19:03:33,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-05-02 19:03:33,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 135. [2021-05-02 19:03:33,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 110 states have (on average 1.0818181818181818) internal successors, (119), 111 states have internal predecessors, (119), 13 states have call successors, (13), 12 states have call predecessors, (13), 11 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 19:03:33,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 144 transitions. [2021-05-02 19:03:33,440 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 144 transitions. Word has length 113 [2021-05-02 19:03:33,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:03:33,440 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 144 transitions. [2021-05-02 19:03:33,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 42 states have (on average 3.2857142857142856) internal successors, (138), 42 states have internal predecessors, (138), 19 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 19:03:33,440 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 144 transitions. [2021-05-02 19:03:33,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-05-02 19:03:33,442 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:03:33,442 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 8, 7, 6, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:03:33,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 19:03:33,664 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:03:33,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:03:33,665 INFO L82 PathProgramCache]: Analyzing trace with hash -75810073, now seen corresponding path program 2 times [2021-05-02 19:03:33,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:03:33,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882066516] [2021-05-02 19:03:33,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:03:33,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:34,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:03:34,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:34,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-02 19:03:34,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:34,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-05-02 19:03:34,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:34,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-05-02 19:03:34,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:34,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-05-02 19:03:34,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:34,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-05-02 19:03:34,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:34,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-05-02 19:03:34,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:34,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-05-02 19:03:34,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:34,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-05-02 19:03:34,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:34,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-05-02 19:03:34,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:34,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-05-02 19:03:34,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:03:34,289 INFO L134 CoverageAnalysis]: Checked inductivity of 504 backedges. 40 proven. 284 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-05-02 19:03:34,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:03:34,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882066516] [2021-05-02 19:03:34,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882066516] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:03:34,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300290253] [2021-05-02 19:03:34,290 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 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