/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/nla-digbench-scaling/bresenham-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 19:29:31,890 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 19:29:31,892 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 19:29:31,921 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 19:29:31,964 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 19:29:31,964 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 19:29:31,965 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 19:29:31,965 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 19:29:31,979 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 19:29:31,979 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 19:29:31,981 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 19:29:31,981 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 19:29:31,981 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 19:29:31,981 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 19:29:31,981 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 19:29:31,981 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 19:29:31,982 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 19:29:31,982 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 19:29:31,982 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 19:29:31,983 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 19:29:31,983 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 19:29:31,983 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 19:29:31,983 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 19:29:31,983 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 19:29:31,983 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 19:29:31,983 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 19:29:31,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:29:31,983 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 19:29:31,983 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 19:29:31,984 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 19:29:31,984 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 19:29:32,236 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 19:29:32,251 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 19:29:32,253 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 19:29:32,254 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 19:29:32,255 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 19:29:32,255 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound100.c [2021-05-02 19:29:32,304 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa55e71fa/eec333d143234e8db6410c29ee877e67/FLAG229b2130c [2021-05-02 19:29:32,639 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 19:29:32,640 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound100.c [2021-05-02 19:29:32,645 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa55e71fa/eec333d143234e8db6410c29ee877e67/FLAG229b2130c [2021-05-02 19:29:32,659 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa55e71fa/eec333d143234e8db6410c29ee877e67 [2021-05-02 19:29:32,661 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 19:29:32,662 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 19:29:32,666 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 19:29:32,666 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 19:29:32,669 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 19:29:32,670 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:29:32" (1/1) ... [2021-05-02 19:29:32,670 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b1f8817 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:29:32, skipping insertion in model container [2021-05-02 19:29:32,670 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:29:32" (1/1) ... [2021-05-02 19:29:32,675 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 19:29:32,686 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 19:29:32,807 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound100.c[597,610] [2021-05-02 19:29:32,849 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:29:32,868 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 19:29:32,877 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound100.c[597,610] [2021-05-02 19:29:32,897 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:29:32,906 INFO L208 MainTranslator]: Completed translation [2021-05-02 19:29:32,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:29:32 WrapperNode [2021-05-02 19:29:32,906 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 19:29:32,907 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 19:29:32,907 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 19:29:32,907 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 19:29:32,916 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:29:32" (1/1) ... [2021-05-02 19:29:32,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:29:32" (1/1) ... [2021-05-02 19:29:32,921 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:29:32" (1/1) ... [2021-05-02 19:29:32,922 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:29:32" (1/1) ... [2021-05-02 19:29:32,934 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:29:32" (1/1) ... [2021-05-02 19:29:32,938 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:29:32" (1/1) ... [2021-05-02 19:29:32,943 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:29:32" (1/1) ... [2021-05-02 19:29:32,946 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 19:29:32,947 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 19:29:32,948 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 19:29:32,948 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 19:29:32,948 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:29:32" (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 19:29:33,015 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 19:29:33,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 19:29:33,016 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 19:29:33,016 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 19:29:33,016 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 19:29:33,016 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 19:29:33,016 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 19:29:33,016 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 19:29:33,017 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 19:29:33,017 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 19:29:33,017 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 19:29:33,017 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 19:29:33,017 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 19:29:33,017 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 19:29:33,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 19:29:33,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 19:29:33,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 19:29:33,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 19:29:33,019 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 19:29:33,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 19:29:33,193 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 19:29:33,193 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 19:29:33,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:29:33 BoogieIcfgContainer [2021-05-02 19:29:33,194 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 19:29:33,195 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 19:29:33,195 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 19:29:33,195 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 19:29:33,197 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:29:33" (1/1) ... [2021-05-02 19:29:33,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:29:33 BasicIcfg [2021-05-02 19:29:33,209 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 19:29:33,210 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 19:29:33,210 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 19:29:33,212 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 19:29:33,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 07:29:32" (1/4) ... [2021-05-02 19:29:33,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74ac9d5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:29:33, skipping insertion in model container [2021-05-02 19:29:33,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:29:32" (2/4) ... [2021-05-02 19:29:33,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74ac9d5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:29:33, skipping insertion in model container [2021-05-02 19:29:33,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:29:33" (3/4) ... [2021-05-02 19:29:33,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74ac9d5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:29:33, skipping insertion in model container [2021-05-02 19:29:33,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:29:33" (4/4) ... [2021-05-02 19:29:33,214 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_unwindbound100.cJordan [2021-05-02 19:29:33,218 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 19:29:33,220 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 19:29:33,231 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 19:29:33,243 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 19:29:33,244 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 19:29:33,244 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 19:29:33,244 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 19:29:33,244 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 19:29:33,244 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 19:29:33,244 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 19:29:33,244 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 19:29:33,252 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 19:29:33,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 19:29:33,256 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:29:33,257 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:29:33,257 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:29:33,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:29:33,261 INFO L82 PathProgramCache]: Analyzing trace with hash -498253564, now seen corresponding path program 1 times [2021-05-02 19:29:33,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:29:33,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473276609] [2021-05-02 19:29:33,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:29:33,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:29:33,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:29:33,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:29:33,452 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 19:29:33,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:29:33,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473276609] [2021-05-02 19:29:33,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473276609] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:29:33,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:29:33,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 19:29:33,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199909433] [2021-05-02 19:29:33,457 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 19:29:33,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:29:33,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 19:29:33,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:29:33,467 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:29:33,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:29:33,563 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-05-02 19:29:33,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 19:29:33,565 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 19:29:33,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:29:33,569 INFO L225 Difference]: With dead ends: 26 [2021-05-02 19:29:33,570 INFO L226 Difference]: Without dead ends: 21 [2021-05-02 19:29:33,571 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:29:33,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-05-02 19:29:33,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2021-05-02 19:29:33,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 19:29:33,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-05-02 19:29:33,596 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2021-05-02 19:29:33,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:29:33,596 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-05-02 19:29:33,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:29:33,597 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-05-02 19:29:33,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 19:29:33,597 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:29:33,598 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:29:33,598 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 19:29:33,598 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:29:33,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:29:33,600 INFO L82 PathProgramCache]: Analyzing trace with hash -467747580, now seen corresponding path program 1 times [2021-05-02 19:29:33,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:29:33,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142475897] [2021-05-02 19:29:33,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:29:33,636 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:29:33,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1886452273] [2021-05-02 19:29:33,636 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 19:29:33,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:29:33,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 19:29:33,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:29:33,850 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 19:29:33,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:29:33,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142475897] [2021-05-02 19:29:33,851 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:29:33,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886452273] [2021-05-02 19:29:33,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886452273] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:29:33,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:29:33,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 19:29:33,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785129426] [2021-05-02 19:29:33,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 19:29:33,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:29:33,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 19:29:33,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:29:33,853 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 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 19:29:33,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:29:33,961 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2021-05-02 19:29:33,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 19:29:33,961 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 19:29:33,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:29:33,962 INFO L225 Difference]: With dead ends: 32 [2021-05-02 19:29:33,963 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 19:29:33,963 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 59.2ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:29:33,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 19:29:33,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-05-02 19:29:33,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 19:29:33,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-05-02 19:29:33,967 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 12 [2021-05-02 19:29:33,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:29:33,967 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-05-02 19:29:33,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 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 19:29:33,967 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-05-02 19:29:33,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 19:29:33,968 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:29:33,968 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:29:34,186 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 19:29:34,189 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:29:34,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:29:34,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1909475431, now seen corresponding path program 1 times [2021-05-02 19:29:34,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:29:34,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936700506] [2021-05-02 19:29:34,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:29:34,211 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:29:34,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1486757908] [2021-05-02 19:29:34,211 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 19:29:34,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:29:34,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 19:29:34,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:29:34,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:34,454 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:29:34,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:29:34,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936700506] [2021-05-02 19:29:34,455 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:29:34,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486757908] [2021-05-02 19:29:34,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486757908] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:29:34,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:29:34,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:29:34,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043998882] [2021-05-02 19:29:34,456 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:29:34,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:29:34,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:29:34,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:29:34,457 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 19:29:34,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:29:34,606 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2021-05-02 19:29:34,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 19:29:34,606 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2021-05-02 19:29:34,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:29:34,609 INFO L225 Difference]: With dead ends: 42 [2021-05-02 19:29:34,610 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 19:29:34,611 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 111.4ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 19:29:34,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 19:29:34,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-05-02 19:29:34,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 28 states have internal predecessors, (32), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 19:29:34,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-05-02 19:29:34,619 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 22 [2021-05-02 19:29:34,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:29:34,620 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-05-02 19:29:34,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 19:29:34,620 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-05-02 19:29:34,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 19:29:34,621 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:29:34,621 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:29:34,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:29:34,829 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:29:34,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:29:34,830 INFO L82 PathProgramCache]: Analyzing trace with hash -642681530, now seen corresponding path program 1 times [2021-05-02 19:29:34,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:29:34,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667683662] [2021-05-02 19:29:34,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:29:34,839 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:29:34,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1703980789] [2021-05-02 19:29:34,839 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 19:29:34,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:29:34,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 19:29:34,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:29:34,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:35,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:35,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:35,065 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:29:35,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:29:35,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667683662] [2021-05-02 19:29:35,065 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:29:35,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703980789] [2021-05-02 19:29:35,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703980789] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:29:35,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:29:35,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 19:29:35,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847587131] [2021-05-02 19:29:35,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 19:29:35,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:29:35,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 19:29:35,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:29:35,067 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 19:29:35,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:29:35,229 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2021-05-02 19:29:35,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 19:29:35,230 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2021-05-02 19:29:35,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:29:35,231 INFO L225 Difference]: With dead ends: 51 [2021-05-02 19:29:35,231 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 19:29:35,231 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 115.8ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-02 19:29:35,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 19:29:35,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2021-05-02 19:29:35,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 35 states have internal predecessors, (39), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 19:29:35,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-05-02 19:29:35,235 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 22 [2021-05-02 19:29:35,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:29:35,235 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-05-02 19:29:35,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 19:29:35,235 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-05-02 19:29:35,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 19:29:35,236 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:29:35,236 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:29:35,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:29:35,437 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:29:35,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:29:35,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1519292561, now seen corresponding path program 1 times [2021-05-02 19:29:35,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:29:35,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442596853] [2021-05-02 19:29:35,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:29:35,445 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:29:35,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1019264985] [2021-05-02 19:29:35,445 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 19:29:35,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:29:35,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 19:29:35,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:29:35,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:35,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:35,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:35,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:35,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:35,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:35,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:35,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:35,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:29:35,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:29:35,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442596853] [2021-05-02 19:29:35,546 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:29:35,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019264985] [2021-05-02 19:29:35,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019264985] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:29:35,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:29:35,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 19:29:35,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258832074] [2021-05-02 19:29:35,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 19:29:35,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:29:35,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 19:29:35,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 19:29:35,547 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 19:29:35,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:29:35,566 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2021-05-02 19:29:35,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 19:29:35,566 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2021-05-02 19:29:35,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:29:35,568 INFO L225 Difference]: With dead ends: 46 [2021-05-02 19:29:35,568 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 19:29:35,568 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.2ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:29:35,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 19:29:35,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-02 19:29:35,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 19:29:35,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-05-02 19:29:35,571 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 23 [2021-05-02 19:29:35,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:29:35,571 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-05-02 19:29:35,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 19:29:35,572 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-05-02 19:29:35,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 19:29:35,572 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:29:35,572 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:29:35,788 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:29:35,788 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:29:35,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:29:35,789 INFO L82 PathProgramCache]: Analyzing trace with hash -2036751370, now seen corresponding path program 1 times [2021-05-02 19:29:35,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:29:35,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014518879] [2021-05-02 19:29:35,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:29:35,796 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:29:35,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [263744122] [2021-05-02 19:29:35,796 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 19:29:35,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:29:35,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 19:29:35,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:29:35,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:35,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:35,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:36,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:36,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:36,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:36,078 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 19:29:36,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:29:36,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014518879] [2021-05-02 19:29:36,078 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:29:36,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263744122] [2021-05-02 19:29:36,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263744122] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:29:36,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:29:36,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 19:29:36,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271341265] [2021-05-02 19:29:36,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 19:29:36,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:29:36,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 19:29:36,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-02 19:29:36,081 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 14 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 19:29:36,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:29:36,258 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2021-05-02 19:29:36,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 19:29:36,258 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 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 19:29:36,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:29:36,259 INFO L225 Difference]: With dead ends: 55 [2021-05-02 19:29:36,259 INFO L226 Difference]: Without dead ends: 49 [2021-05-02 19:29:36,259 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 200.9ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-05-02 19:29:36,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-02 19:29:36,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2021-05-02 19:29:36,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 28 states have internal predecessors, (32), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 19:29:36,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-05-02 19:29:36,262 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 29 [2021-05-02 19:29:36,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:29:36,262 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-05-02 19:29:36,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 19:29:36,262 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-05-02 19:29:36,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 19:29:36,263 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:29:36,263 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:29:36,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 19:29:36,469 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:29:36,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:29:36,469 INFO L82 PathProgramCache]: Analyzing trace with hash 398537738, now seen corresponding path program 2 times [2021-05-02 19:29:36,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:29:36,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796247901] [2021-05-02 19:29:36,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:29:36,476 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:29:36,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1692348589] [2021-05-02 19:29:36,476 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 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 19:29:36,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:29:36,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:29:36,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 19:29:36,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:29:36,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:36,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:36,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:37,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:37,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:37,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:37,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:37,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:37,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:37,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:37,081 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 19:29:37,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:29:37,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796247901] [2021-05-02 19:29:37,081 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:29:37,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692348589] [2021-05-02 19:29:37,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692348589] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:29:37,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:29:37,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 19:29:37,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880036560] [2021-05-02 19:29:37,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 19:29:37,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:29:37,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 19:29:37,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-05-02 19:29:37,086 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 13 states, 10 states have (on average 2.1) internal successors, (21), 12 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 19:29:37,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:29:37,826 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2021-05-02 19:29:37,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 19:29:37,826 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.1) internal successors, (21), 12 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2021-05-02 19:29:37,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:29:37,827 INFO L225 Difference]: With dead ends: 52 [2021-05-02 19:29:37,827 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 19:29:37,827 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 498.6ms TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-05-02 19:29:37,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 19:29:37,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 19:29:37,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 19:29:37,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 19:29:37,828 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2021-05-02 19:29:37,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:29:37,828 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 19:29:37,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 10 states have (on average 2.1) internal successors, (21), 12 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 19:29:37,828 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 19:29:37,828 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 19:29:38,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:29:38,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:29:38 BasicIcfg [2021-05-02 19:29:38,032 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 19:29:38,033 INFO L168 Benchmark]: Toolchain (without parser) took 5370.48 ms. Allocated memory was 199.2 MB in the beginning and 271.6 MB in the end (delta: 72.4 MB). Free memory was 163.9 MB in the beginning and 240.5 MB in the end (delta: -76.6 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 19:29:38,033 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 199.2 MB. Free memory is still 180.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 19:29:38,033 INFO L168 Benchmark]: CACSL2BoogieTranslator took 240.59 ms. Allocated memory is still 199.2 MB. Free memory was 163.7 MB in the beginning and 180.7 MB in the end (delta: -17.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 8.0 GB. [2021-05-02 19:29:38,033 INFO L168 Benchmark]: Boogie Preprocessor took 39.07 ms. Allocated memory is still 199.2 MB. Free memory was 180.7 MB in the beginning and 179.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 19:29:38,033 INFO L168 Benchmark]: RCFGBuilder took 247.21 ms. Allocated memory is still 199.2 MB. Free memory was 179.3 MB in the beginning and 164.3 MB in the end (delta: 15.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 19:29:38,033 INFO L168 Benchmark]: IcfgTransformer took 14.51 ms. Allocated memory is still 199.2 MB. Free memory was 164.3 MB in the beginning and 162.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 19:29:38,033 INFO L168 Benchmark]: TraceAbstraction took 4821.95 ms. Allocated memory was 199.2 MB in the beginning and 271.6 MB in the end (delta: 72.4 MB). Free memory was 162.5 MB in the beginning and 240.5 MB in the end (delta: -78.0 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 19:29:38,034 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 199.2 MB. Free memory is still 180.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 240.59 ms. Allocated memory is still 199.2 MB. Free memory was 163.7 MB in the beginning and 180.7 MB in the end (delta: -17.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.07 ms. Allocated memory is still 199.2 MB. Free memory was 180.7 MB in the beginning and 179.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 247.21 ms. Allocated memory is still 199.2 MB. Free memory was 179.3 MB in the beginning and 164.3 MB in the end (delta: 15.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 14.51 ms. Allocated memory is still 199.2 MB. Free memory was 164.3 MB in the beginning and 162.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4821.95 ms. Allocated memory was 199.2 MB in the beginning and 271.6 MB in the end (delta: 72.4 MB). Free memory was 162.5 MB in the beginning and 240.5 MB in the end (delta: -78.0 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4787.4ms, OverallIterations: 7, TraceHistogramMax: 3, EmptinessCheckTime: 10.0ms, AutomataDifference: 1485.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 130 SDtfs, 93 SDslu, 588 SDs, 0 SdLazy, 853 SolverSat, 33 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 947.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 157 GetRequests, 88 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1034.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=4, InterpolantAutomatonStates: 62, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 37.5ms AutomataMinimizationTime, 7 MinimizatonAttempts, 19 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 59.3ms SsaConstructionTime, 155.8ms SatisfiabilityAnalysisTime, 1460.5ms InterpolantComputationTime, 152 NumberOfCodeBlocks, 152 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 145 ConstructedInterpolants, 0 QuantifiedInterpolants, 1075 SizeOfPredicates, 37 NumberOfNonLiveVariables, 842 ConjunctsInSsa, 155 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 16/46 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...