/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/ps3-ll_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 22:11:03,498 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 22:11:03,500 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 22:11:03,538 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 22:11:03,558 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 22:11:03,559 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 22:11:03,561 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 22:11:03,562 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 22:11:03,563 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 22:11:03,565 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 22:11:03,567 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 22:11:03,589 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 22:11:03,590 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 22:11:03,591 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 22:11:03,592 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 22:11:03,592 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 22:11:03,594 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 22:11:03,598 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 22:11:03,599 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 22:11:03,599 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 22:11:03,613 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 22:11:03,620 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 22:11:03,620 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 22:11:03,621 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 22:11:03,621 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 22:11:03,621 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 22:11:03,621 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 22:11:03,621 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 22:11:03,621 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 22:11:03,621 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 22:11:03,622 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 22:11:03,622 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 22:11:03,622 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 22:11:03,622 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 22:11:03,622 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 22:11:03,622 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 22:11:03,622 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 22:11:03,622 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 22:11:03,622 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 22:11:03,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 22:11:03,623 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 22:11:03,623 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 22:11:03,623 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 22:11:03,623 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 22:11:03,902 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 22:11:03,923 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 22:11:03,924 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 22:11:03,925 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 22:11:03,925 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 22:11:03,926 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps3-ll_valuebound1.c [2021-05-02 22:11:03,986 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9ae576f6/f83dcca6e74d4829bb4ef8f03ccd42a3/FLAG3a2069827 [2021-05-02 22:11:04,284 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 22:11:04,284 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps3-ll_valuebound1.c [2021-05-02 22:11:04,289 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9ae576f6/f83dcca6e74d4829bb4ef8f03ccd42a3/FLAG3a2069827 [2021-05-02 22:11:04,697 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9ae576f6/f83dcca6e74d4829bb4ef8f03ccd42a3 [2021-05-02 22:11:04,698 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 22:11:04,699 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 22:11:04,705 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 22:11:04,705 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 22:11:04,712 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 22:11:04,713 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:11:04" (1/1) ... [2021-05-02 22:11:04,714 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@387713e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:11:04, skipping insertion in model container [2021-05-02 22:11:04,714 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:11:04" (1/1) ... [2021-05-02 22:11:04,718 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 22:11:04,728 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 22:11:04,809 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/ps3-ll_valuebound1.c[458,471] [2021-05-02 22:11:04,816 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:11:04,821 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 22:11:04,845 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/ps3-ll_valuebound1.c[458,471] [2021-05-02 22:11:04,858 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:11:04,868 INFO L208 MainTranslator]: Completed translation [2021-05-02 22:11:04,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:11:04 WrapperNode [2021-05-02 22:11:04,869 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 22:11:04,869 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 22:11:04,869 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 22:11:04,869 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 22:11:04,875 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:11:04" (1/1) ... [2021-05-02 22:11:04,875 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:11:04" (1/1) ... [2021-05-02 22:11:04,880 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:11:04" (1/1) ... [2021-05-02 22:11:04,880 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:11:04" (1/1) ... [2021-05-02 22:11:04,883 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:11:04" (1/1) ... [2021-05-02 22:11:04,885 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:11:04" (1/1) ... [2021-05-02 22:11:04,886 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:11:04" (1/1) ... [2021-05-02 22:11:04,887 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 22:11:04,887 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 22:11:04,888 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 22:11:04,888 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 22:11:04,888 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:11:04" (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 22:11:04,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 22:11:04,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 22:11:04,951 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 22:11:04,951 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 22:11:04,951 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 22:11:04,952 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 22:11:04,952 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 22:11:04,952 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 22:11:04,952 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 22:11:04,952 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 22:11:04,952 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-02 22:11:04,953 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 22:11:04,953 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 22:11:04,953 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 22:11:04,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 22:11:04,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 22:11:04,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 22:11:04,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 22:11:04,954 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 22:11:04,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 22:11:05,161 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 22:11:05,162 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 22:11:05,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:11:05 BoogieIcfgContainer [2021-05-02 22:11:05,163 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 22:11:05,163 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 22:11:05,163 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 22:11:05,164 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 22:11:05,165 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:11:05" (1/1) ... [2021-05-02 22:11:05,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:11:05 BasicIcfg [2021-05-02 22:11:05,175 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 22:11:05,176 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 22:11:05,176 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 22:11:05,178 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 22:11:05,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 10:11:04" (1/4) ... [2021-05-02 22:11:05,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b57cb7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:11:05, skipping insertion in model container [2021-05-02 22:11:05,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:11:04" (2/4) ... [2021-05-02 22:11:05,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b57cb7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:11:05, skipping insertion in model container [2021-05-02 22:11:05,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:11:05" (3/4) ... [2021-05-02 22:11:05,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b57cb7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 10:11:05, skipping insertion in model container [2021-05-02 22:11:05,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:11:05" (4/4) ... [2021-05-02 22:11:05,180 INFO L111 eAbstractionObserver]: Analyzing ICFG ps3-ll_valuebound1.cJordan [2021-05-02 22:11:05,183 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 22:11:05,185 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 22:11:05,200 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 22:11:05,217 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 22:11:05,217 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 22:11:05,217 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 22:11:05,217 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 22:11:05,217 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 22:11:05,218 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 22:11:05,218 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 22:11:05,218 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 22:11:05,225 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 22:11:05,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 22:11:05,229 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:11:05,230 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:11:05,230 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:11:05,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:11:05,233 INFO L82 PathProgramCache]: Analyzing trace with hash 409333534, now seen corresponding path program 1 times [2021-05-02 22:11:05,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:11:05,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545009384] [2021-05-02 22:11:05,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:11:05,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:11:05,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 22:11:05,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:11:05,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 22:11:05,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:11:05,398 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 22:11:05,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:11:05,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545009384] [2021-05-02 22:11:05,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545009384] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:11:05,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:11:05,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 22:11:05,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382467977] [2021-05-02 22:11:05,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 22:11:05,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:11:05,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 22:11:05,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:11:05,412 INFO L87 Difference]: Start difference. First operand has 27 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 22:11:05,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:11:05,460 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2021-05-02 22:11:05,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 22:11:05,462 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 22:11:05,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:11:05,471 INFO L225 Difference]: With dead ends: 27 [2021-05-02 22:11:05,471 INFO L226 Difference]: Without dead ends: 22 [2021-05-02 22:11:05,472 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:11:05,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-02 22:11:05,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-05-02 22:11:05,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 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 22:11:05,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-05-02 22:11:05,498 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2021-05-02 22:11:05,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:11:05,499 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-05-02 22:11:05,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 22:11:05,500 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-05-02 22:11:05,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 22:11:05,500 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:11:05,500 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:11:05,501 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 22:11:05,501 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:11:05,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:11:05,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1396244096, now seen corresponding path program 1 times [2021-05-02 22:11:05,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:11:05,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353269885] [2021-05-02 22:11:05,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:11:05,539 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:11:05,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2113763296] [2021-05-02 22:11:05,539 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 22:11:05,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:11:05,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 22:11:05,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:11:05,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:11:05,725 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 22:11:05,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:11:05,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353269885] [2021-05-02 22:11:05,725 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:11:05,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113763296] [2021-05-02 22:11:05,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113763296] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:11:05,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:11:05,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 22:11:05,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754498782] [2021-05-02 22:11:05,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 22:11:05,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:11:05,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 22:11:05,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 22:11:05,731 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 22:11:05,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:11:05,775 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-05-02 22:11:05,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 22:11:05,775 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 22:11:05,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:11:05,776 INFO L225 Difference]: With dead ends: 30 [2021-05-02 22:11:05,776 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 22:11:05,777 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 35.4ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:11:05,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 22:11:05,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-02 22:11:05,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 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 22:11:05,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-05-02 22:11:05,780 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 17 [2021-05-02 22:11:05,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:11:05,780 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-05-02 22:11:05,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 22:11:05,781 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-05-02 22:11:05,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 22:11:05,781 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:11:05,781 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:11:05,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 22:11:05,993 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:11:05,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:11:05,994 INFO L82 PathProgramCache]: Analyzing trace with hash 279144821, now seen corresponding path program 1 times [2021-05-02 22:11:05,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:11:05,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734823410] [2021-05-02 22:11:05,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:11:06,007 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:11:06,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [738835135] [2021-05-02 22:11:06,007 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 22:11:06,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:11:06,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 22:11:06,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:11:06,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:11:06,124 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 22:11:06,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:11:06,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734823410] [2021-05-02 22:11:06,125 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:11:06,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738835135] [2021-05-02 22:11:06,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738835135] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:11:06,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:11:06,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 22:11:06,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081349136] [2021-05-02 22:11:06,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 22:11:06,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:11:06,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 22:11:06,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:11:06,126 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 22:11:06,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:11:06,229 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2021-05-02 22:11:06,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:11:06,229 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-05-02 22:11:06,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:11:06,230 INFO L225 Difference]: With dead ends: 37 [2021-05-02 22:11:06,230 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 22:11:06,230 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 72.1ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:11:06,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 22:11:06,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-02 22:11:06,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 22:11:06,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-05-02 22:11:06,234 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 24 [2021-05-02 22:11:06,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:11:06,234 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-05-02 22:11:06,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 22:11:06,234 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-05-02 22:11:06,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 22:11:06,235 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:11:06,235 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:11:06,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:11:06,452 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:11:06,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:11:06,453 INFO L82 PathProgramCache]: Analyzing trace with hash -522906656, now seen corresponding path program 2 times [2021-05-02 22:11:06,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:11:06,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563287105] [2021-05-02 22:11:06,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:11:06,460 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:11:06,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [200654372] [2021-05-02 22:11:06,461 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 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 22:11:06,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:11:06,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:11:06,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 22:11:06,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:11:06,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:11:06,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:11:06,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:11:06,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:11:06,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:11:06,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:11:06,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:11:06,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:11:06,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:11:06,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:11:06,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:11:06,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:11:06,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:11:06,660 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 22:11:06,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:11:06,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563287105] [2021-05-02 22:11:06,660 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:11:06,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200654372] [2021-05-02 22:11:06,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200654372] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:11:06,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:11:06,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 22:11:06,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169439017] [2021-05-02 22:11:06,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 22:11:06,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:11:06,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 22:11:06,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-02 22:11:06,662 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 22:11:06,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:11:06,687 INFO L93 Difference]: Finished difference Result 26 states and 25 transitions. [2021-05-02 22:11:06,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 22:11:06,688 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2021-05-02 22:11:06,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:11:06,688 INFO L225 Difference]: With dead ends: 26 [2021-05-02 22:11:06,688 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 22:11:06,688 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 32.6ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:11:06,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 22:11:06,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 22:11:06,689 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 22:11:06,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 22:11:06,689 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2021-05-02 22:11:06,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:11:06,689 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 22:11:06,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 22:11:06,689 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 22:11:06,689 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 22:11:06,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:11:06,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 10:11:06 BasicIcfg [2021-05-02 22:11:06,912 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 22:11:06,913 INFO L168 Benchmark]: Toolchain (without parser) took 2213.32 ms. Allocated memory was 204.5 MB in the beginning and 245.4 MB in the end (delta: 40.9 MB). Free memory was 169.1 MB in the beginning and 202.5 MB in the end (delta: -33.4 MB). Peak memory consumption was 9.0 MB. Max. memory is 8.0 GB. [2021-05-02 22:11:06,913 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 204.5 MB. Free memory is still 185.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 22:11:06,913 INFO L168 Benchmark]: CACSL2BoogieTranslator took 164.28 ms. Allocated memory is still 204.5 MB. Free memory was 168.8 MB in the beginning and 187.1 MB in the end (delta: -18.3 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. [2021-05-02 22:11:06,913 INFO L168 Benchmark]: Boogie Preprocessor took 17.72 ms. Allocated memory is still 204.5 MB. Free memory was 187.1 MB in the beginning and 185.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 22:11:06,913 INFO L168 Benchmark]: RCFGBuilder took 275.12 ms. Allocated memory is still 204.5 MB. Free memory was 185.5 MB in the beginning and 171.4 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 22:11:06,913 INFO L168 Benchmark]: IcfgTransformer took 12.43 ms. Allocated memory is still 204.5 MB. Free memory was 171.4 MB in the beginning and 170.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 22:11:06,913 INFO L168 Benchmark]: TraceAbstraction took 1735.72 ms. Allocated memory was 204.5 MB in the beginning and 245.4 MB in the end (delta: 40.9 MB). Free memory was 169.8 MB in the beginning and 202.5 MB in the end (delta: -32.6 MB). Peak memory consumption was 9.8 MB. Max. memory is 8.0 GB. [2021-05-02 22:11:06,914 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 204.5 MB. Free memory is still 185.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 164.28 ms. Allocated memory is still 204.5 MB. Free memory was 168.8 MB in the beginning and 187.1 MB in the end (delta: -18.3 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 17.72 ms. Allocated memory is still 204.5 MB. Free memory was 187.1 MB in the beginning and 185.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 275.12 ms. Allocated memory is still 204.5 MB. Free memory was 185.5 MB in the beginning and 171.4 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 12.43 ms. Allocated memory is still 204.5 MB. Free memory was 171.4 MB in the beginning and 170.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1735.72 ms. Allocated memory was 204.5 MB in the beginning and 245.4 MB in the end (delta: 40.9 MB). Free memory was 169.8 MB in the beginning and 202.5 MB in the end (delta: -32.6 MB). Peak memory consumption was 9.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: 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 5 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1693.5ms, OverallIterations: 4, TraceHistogramMax: 3, EmptinessCheckTime: 8.6ms, AutomataDifference: 249.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 81 SDtfs, 35 SDslu, 247 SDs, 0 SdLazy, 121 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 109.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 81 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 182.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=3, InterpolantAutomatonStates: 25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 24.2ms AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 24.2ms SsaConstructionTime, 86.2ms SatisfiabilityAnalysisTime, 455.7ms InterpolantComputationTime, 89 NumberOfCodeBlocks, 89 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 85 ConstructedInterpolants, 0 QuantifiedInterpolants, 253 SizeOfPredicates, 8 NumberOfNonLiveVariables, 357 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 4 InterpolantComputations, 3 PerfectInterpolantSequences, 17/19 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...