/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/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 16:38:52,766 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 16:38:52,767 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 16:38:52,786 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 16:38:52,792 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 16:38:52,793 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 16:38:52,793 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 16:38:52,794 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 16:38:52,794 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 16:38:52,795 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 16:38:52,796 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 16:38:52,797 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 16:38:52,798 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 16:38:52,798 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 16:38:52,819 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 16:38:52,820 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 16:38:52,821 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 16:38:52,826 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 16:38:52,826 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 16:38:52,826 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 16:38:52,830 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 16:38:52,857 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 16:38:52,857 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 16:38:52,858 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 16:38:52,858 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 16:38:52,858 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 16:38:52,858 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 16:38:52,859 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 16:38:52,859 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 16:38:52,859 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 16:38:52,859 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 16:38:52,859 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 16:38:52,859 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 16:38:52,859 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 16:38:52,859 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 16:38:52,859 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 16:38:52,859 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 16:38:52,860 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 16:38:52,860 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 16:38:52,860 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 16:38:52,860 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 16:38:52,860 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 16:38:52,860 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 16:38:52,860 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 16:38:52,860 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 16:38:52,860 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 16:38:52,860 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 16:38:52,861 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 16:38:52,861 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 16:38:52,861 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 16:38:53,101 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 16:38:53,117 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 16:38:53,119 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 16:38:53,119 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 16:38:53,120 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 16:38:53,121 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_unwindbound10.c [2021-05-02 16:38:53,164 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1fbf8e95/4f147bec396344f7963461bf19c73e84/FLAGb337a15f8 [2021-05-02 16:38:53,482 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 16:38:53,482 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_unwindbound10.c [2021-05-02 16:38:53,486 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1fbf8e95/4f147bec396344f7963461bf19c73e84/FLAGb337a15f8 [2021-05-02 16:38:53,912 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1fbf8e95/4f147bec396344f7963461bf19c73e84 [2021-05-02 16:38:53,914 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 16:38:53,917 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 16:38:53,918 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 16:38:53,918 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 16:38:53,923 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 16:38:53,924 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 04:38:53" (1/1) ... [2021-05-02 16:38:53,925 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68332681 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:38:53, skipping insertion in model container [2021-05-02 16:38:53,925 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 04:38:53" (1/1) ... [2021-05-02 16:38:53,930 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 16:38:53,942 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 16:38:54,020 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/ps2-ll_unwindbound10.c[454,467] [2021-05-02 16:38:54,027 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 16:38:54,032 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 16:38:54,040 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/ps2-ll_unwindbound10.c[454,467] [2021-05-02 16:38:54,046 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 16:38:54,056 INFO L208 MainTranslator]: Completed translation [2021-05-02 16:38:54,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:38:54 WrapperNode [2021-05-02 16:38:54,057 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 16:38:54,059 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 16:38:54,059 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 16:38:54,059 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 16:38:54,065 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:38:54" (1/1) ... [2021-05-02 16:38:54,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:38:54" (1/1) ... [2021-05-02 16:38:54,069 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:38:54" (1/1) ... [2021-05-02 16:38:54,069 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:38:54" (1/1) ... [2021-05-02 16:38:54,089 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:38:54" (1/1) ... [2021-05-02 16:38:54,098 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:38:54" (1/1) ... [2021-05-02 16:38:54,099 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:38:54" (1/1) ... [2021-05-02 16:38:54,100 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 16:38:54,100 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 16:38:54,101 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 16:38:54,101 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 16:38:54,101 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:38:54" (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 16:38:54,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 16:38:54,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 16:38:54,173 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 16:38:54,173 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 16:38:54,173 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 16:38:54,173 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 16:38:54,173 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 16:38:54,174 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 16:38:54,174 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 16:38:54,174 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 16:38:54,175 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 16:38:54,175 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 16:38:54,176 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 16:38:54,176 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 16:38:54,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 16:38:54,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 16:38:54,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 16:38:54,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 16:38:54,177 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 16:38:54,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 16:38:54,306 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 16:38:54,307 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 16:38:54,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 04:38:54 BoogieIcfgContainer [2021-05-02 16:38:54,308 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 16:38:54,309 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 16:38:54,309 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 16:38:54,311 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 16:38:54,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 04:38:53" (1/3) ... [2021-05-02 16:38:54,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e1f95ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 04:38:54, skipping insertion in model container [2021-05-02 16:38:54,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:38:54" (2/3) ... [2021-05-02 16:38:54,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e1f95ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 04:38:54, skipping insertion in model container [2021-05-02 16:38:54,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 04:38:54" (3/3) ... [2021-05-02 16:38:54,313 INFO L111 eAbstractionObserver]: Analyzing ICFG ps2-ll_unwindbound10.c [2021-05-02 16:38:54,317 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 16:38:54,320 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 16:38:54,331 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 16:38:54,356 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 16:38:54,357 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 16:38:54,357 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 16:38:54,357 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 16:38:54,357 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 16:38:54,357 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 16:38:54,357 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 16:38:54,357 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 16:38:54,381 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 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 16:38:54,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 16:38:54,384 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:38:54,385 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:38:54,385 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:38:54,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:38:54,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1665267581, now seen corresponding path program 1 times [2021-05-02 16:38:54,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:38:54,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382821200] [2021-05-02 16:38:54,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:38:54,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:38:54,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 16:38:54,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:38:54,550 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 16:38:54,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:38:54,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382821200] [2021-05-02 16:38:54,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382821200] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:38:54,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:38:54,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 16:38:54,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572611697] [2021-05-02 16:38:54,555 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 16:38:54,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:38:54,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 16:38:54,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 16:38:54,564 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 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 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 16:38:54,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:38:54,630 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2021-05-02 16:38:54,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 16:38:54,632 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 11 [2021-05-02 16:38:54,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:38:54,636 INFO L225 Difference]: With dead ends: 39 [2021-05-02 16:38:54,636 INFO L226 Difference]: Without dead ends: 18 [2021-05-02 16:38:54,638 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 16:38:54,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-02 16:38:54,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-05-02 16:38:54,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 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 16:38:54,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-02 16:38:54,666 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-05-02 16:38:54,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:38:54,666 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-02 16:38:54,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 16:38:54,667 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-02 16:38:54,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 16:38:54,668 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:38:54,668 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:38:54,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 16:38:54,668 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:38:54,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:38:54,669 INFO L82 PathProgramCache]: Analyzing trace with hash -318583316, now seen corresponding path program 1 times [2021-05-02 16:38:54,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:38:54,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716455614] [2021-05-02 16:38:54,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:38:54,697 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:38:54,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [633240664] [2021-05-02 16:38:54,697 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 16:38:54,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:38:54,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 16:38:54,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:38:54,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:38:54,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:38:54,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:38:54,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:38:54,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:38:54,811 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 16:38:54,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:38:54,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716455614] [2021-05-02 16:38:54,812 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:38:54,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633240664] [2021-05-02 16:38:54,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633240664] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:38:54,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:38:54,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 16:38:54,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078284160] [2021-05-02 16:38:54,813 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 16:38:54,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:38:54,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 16:38:54,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 16:38:54,814 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 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 16:38:54,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:38:54,823 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-05-02 16:38:54,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 16:38:54,823 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 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 16:38:54,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:38:54,824 INFO L225 Difference]: With dead ends: 26 [2021-05-02 16:38:54,824 INFO L226 Difference]: Without dead ends: 19 [2021-05-02 16:38:54,824 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 16:38:54,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-02 16:38:54,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-02 16:38:54,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 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 16:38:54,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-05-02 16:38:54,828 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-05-02 16:38:54,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:38:54,828 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-05-02 16:38:54,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 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 16:38:54,828 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-05-02 16:38:54,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 16:38:54,829 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:38:54,829 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:38:55,045 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 16:38:55,045 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:38:55,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:38:55,046 INFO L82 PathProgramCache]: Analyzing trace with hash -316795856, now seen corresponding path program 1 times [2021-05-02 16:38:55,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:38:55,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117721856] [2021-05-02 16:38:55,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:38:55,055 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:38:55,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [6457724] [2021-05-02 16:38:55,055 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 16:38:55,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:38:55,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 16:38:55,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:38:55,165 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 16:38:55,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:38:55,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117721856] [2021-05-02 16:38:55,165 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:38:55,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6457724] [2021-05-02 16:38:55,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6457724] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:38:55,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:38:55,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 16:38:55,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084727162] [2021-05-02 16:38:55,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 16:38:55,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:38:55,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 16:38:55,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 16:38:55,170 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 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 16:38:55,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:38:55,199 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2021-05-02 16:38:55,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 16:38:55,199 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 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 16:38:55,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:38:55,201 INFO L225 Difference]: With dead ends: 28 [2021-05-02 16:38:55,201 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 16:38:55,201 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 16:38:55,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 16:38:55,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-02 16:38:55,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 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 16:38:55,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-05-02 16:38:55,212 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2021-05-02 16:38:55,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:38:55,212 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-05-02 16:38:55,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 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 16:38:55,213 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-05-02 16:38:55,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 16:38:55,214 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:38:55,214 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:38:55,431 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:38:55,432 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:38:55,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:38:55,434 INFO L82 PathProgramCache]: Analyzing trace with hash -2089867248, now seen corresponding path program 1 times [2021-05-02 16:38:55,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:38:55,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410940228] [2021-05-02 16:38:55,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:38:55,454 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:38:55,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [268130339] [2021-05-02 16:38:55,454 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 16:38:55,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:38:55,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 16:38:55,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:38:55,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:38:55,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:38:55,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:38:55,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:38:55,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:38:55,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:38:55,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:38:55,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:38:55,582 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 16:38:55,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:38:55,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410940228] [2021-05-02 16:38:55,582 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:38:55,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268130339] [2021-05-02 16:38:55,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268130339] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:38:55,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:38:55,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 16:38:55,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62786923] [2021-05-02 16:38:55,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 16:38:55,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:38:55,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 16:38:55,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 16:38:55,585 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 16:38:55,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:38:55,615 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-05-02 16:38:55,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 16:38:55,616 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 20 [2021-05-02 16:38:55,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:38:55,617 INFO L225 Difference]: With dead ends: 34 [2021-05-02 16:38:55,617 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 16:38:55,617 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 16:38:55,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 16:38:55,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 16:38:55,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 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 16:38:55,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-05-02 16:38:55,624 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 20 [2021-05-02 16:38:55,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:38:55,624 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-05-02 16:38:55,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 16:38:55,625 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-05-02 16:38:55,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 16:38:55,625 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:38:55,625 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:38:55,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:38:55,837 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:38:55,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:38:55,837 INFO L82 PathProgramCache]: Analyzing trace with hash -2088079788, now seen corresponding path program 1 times [2021-05-02 16:38:55,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:38:55,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587763047] [2021-05-02 16:38:55,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:38:55,845 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:38:55,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [244421024] [2021-05-02 16:38:55,845 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 16:38:55,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:38:55,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 16:38:55,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:38:55,963 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 16:38:55,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:38:55,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587763047] [2021-05-02 16:38:55,963 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:38:55,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244421024] [2021-05-02 16:38:55,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244421024] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:38:55,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:38:55,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 16:38:55,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794692545] [2021-05-02 16:38:55,965 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 16:38:55,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:38:55,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 16:38:55,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 16:38:55,965 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 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 16:38:56,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:38:56,017 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-05-02 16:38:56,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 16:38:56,018 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 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 20 [2021-05-02 16:38:56,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:38:56,019 INFO L225 Difference]: With dead ends: 36 [2021-05-02 16:38:56,019 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 16:38:56,021 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 38.5ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-02 16:38:56,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 16:38:56,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-02 16:38:56,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 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 16:38:56,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-05-02 16:38:56,030 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 20 [2021-05-02 16:38:56,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:38:56,030 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-05-02 16:38:56,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 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 16:38:56,031 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-05-02 16:38:56,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 16:38:56,031 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:38:56,032 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:38:56,244 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:38:56,245 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:38:56,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:38:56,245 INFO L82 PathProgramCache]: Analyzing trace with hash -696181196, now seen corresponding path program 2 times [2021-05-02 16:38:56,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:38:56,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933267519] [2021-05-02 16:38:56,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:38:56,253 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:38:56,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2104641077] [2021-05-02 16:38:56,253 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 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 16:38:56,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:38:56,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:38:56,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 16:38:56,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:38:56,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:38:56,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:38:56,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:38:56,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:38:56,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:38:56,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:38:56,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:38:56,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:38:56,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:38:56,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:38:56,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:38:56,373 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:38:56,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:38:56,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933267519] [2021-05-02 16:38:56,374 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:38:56,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104641077] [2021-05-02 16:38:56,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104641077] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:38:56,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:38:56,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 16:38:56,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422411724] [2021-05-02 16:38:56,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 16:38:56,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:38:56,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 16:38:56,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 16:38:56,375 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 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 16:38:56,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:38:56,405 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2021-05-02 16:38:56,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 16:38:56,406 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-02 16:38:56,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:38:56,407 INFO L225 Difference]: With dead ends: 42 [2021-05-02 16:38:56,407 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 16:38:56,408 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 18.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 16:38:56,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 16:38:56,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 16:38:56,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 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 16:38:56,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-05-02 16:38:56,414 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 28 [2021-05-02 16:38:56,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:38:56,414 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-05-02 16:38:56,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 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 16:38:56,414 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-05-02 16:38:56,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 16:38:56,415 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:38:56,415 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:38:56,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 16:38:56,629 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:38:56,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:38:56,629 INFO L82 PathProgramCache]: Analyzing trace with hash -694393736, now seen corresponding path program 2 times [2021-05-02 16:38:56,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:38:56,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221679543] [2021-05-02 16:38:56,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:38:56,644 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:38:56,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1958258468] [2021-05-02 16:38:56,644 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 16:38:56,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:38:56,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:38:56,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 16:38:56,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:38:56,769 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 16:38:56,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:38:56,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221679543] [2021-05-02 16:38:56,770 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:38:56,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958258468] [2021-05-02 16:38:56,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958258468] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:38:56,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:38:56,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 16:38:56,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647868007] [2021-05-02 16:38:56,770 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 16:38:56,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:38:56,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 16:38:56,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 16:38:56,773 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 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 16:38:56,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:38:56,847 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2021-05-02 16:38:56,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 16:38:56,847 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 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 28 [2021-05-02 16:38:56,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:38:56,848 INFO L225 Difference]: With dead ends: 44 [2021-05-02 16:38:56,848 INFO L226 Difference]: Without dead ends: 41 [2021-05-02 16:38:56,848 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 50.5ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-02 16:38:56,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-02 16:38:56,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-05-02 16:38:56,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 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 16:38:56,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2021-05-02 16:38:56,852 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 28 [2021-05-02 16:38:56,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:38:56,852 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2021-05-02 16:38:56,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 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 16:38:56,852 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2021-05-02 16:38:56,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 16:38:56,853 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:38:56,853 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:38:57,070 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:38:57,071 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:38:57,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:38:57,071 INFO L82 PathProgramCache]: Analyzing trace with hash 618442840, now seen corresponding path program 3 times [2021-05-02 16:38:57,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:38:57,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072017729] [2021-05-02 16:38:57,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:38:57,082 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:38:57,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [169248218] [2021-05-02 16:38:57,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:38:57,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 16:38:57,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:38:57,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 16:38:57,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:38:57,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:38:57,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:38:57,219 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 16:38:57,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:38:57,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072017729] [2021-05-02 16:38:57,219 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:38:57,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169248218] [2021-05-02 16:38:57,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169248218] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:38:57,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:38:57,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 16:38:57,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260638375] [2021-05-02 16:38:57,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 16:38:57,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:38:57,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 16:38:57,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 16:38:57,221 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 16:38:57,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:38:57,245 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2021-05-02 16:38:57,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 16:38:57,245 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), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2021-05-02 16:38:57,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:38:57,247 INFO L225 Difference]: With dead ends: 41 [2021-05-02 16:38:57,247 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 16:38:57,247 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.5ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-02 16:38:57,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 16:38:57,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 16:38:57,247 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 16:38:57,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 16:38:57,248 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2021-05-02 16:38:57,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:38:57,248 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 16:38:57,248 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), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 16:38:57,248 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 16:38:57,248 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 16:38:57,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:38:57,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 16:38:57,605 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-05-02 16:38:57,605 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-05-02 16:38:57,605 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-05-02 16:38:57,605 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 16:38:57,605 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= ~counter~0 |old(~counter~0)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-02 16:38:57,606 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 16:38:57,606 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 16:38:57,606 INFO L194 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: (<= ~counter~0 0) [2021-05-02 16:38:57,606 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 16:38:57,606 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 16:38:57,606 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 6 8) no Hoare annotation was computed. [2021-05-02 16:38:57,606 INFO L198 CegarLoopUtils]: For program point L7(line 7) no Hoare annotation was computed. [2021-05-02 16:38:57,606 INFO L198 CegarLoopUtils]: For program point L7-2(lines 6 8) no Hoare annotation was computed. [2021-05-02 16:38:57,606 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 6 8) no Hoare annotation was computed. [2021-05-02 16:38:57,606 INFO L194 CegarLoopUtils]: At program point mainENTRY(lines 18 40) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (= ~counter~0 |old(~counter~0)|)) [2021-05-02 16:38:57,606 INFO L194 CegarLoopUtils]: At program point L28(line 28) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (= (+ (* main_~y~0 main_~y~0) main_~y~0) (* main_~x~0 2))) [2021-05-02 16:38:57,606 INFO L198 CegarLoopUtils]: For program point L28-1(lines 27 36) no Hoare annotation was computed. [2021-05-02 16:38:57,606 INFO L198 CegarLoopUtils]: For program point L27-1(lines 27 36) no Hoare annotation was computed. [2021-05-02 16:38:57,606 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 18 40) no Hoare annotation was computed. [2021-05-02 16:38:57,607 INFO L194 CegarLoopUtils]: At program point L27-3(lines 27 36) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (= (+ (* main_~y~0 main_~y~0) main_~y~0) (* main_~x~0 2))) [2021-05-02 16:38:57,607 INFO L194 CegarLoopUtils]: At program point L27-4(lines 27 36) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (= (+ (* main_~y~0 main_~y~0) main_~y~0) (* main_~x~0 2))) [2021-05-02 16:38:57,607 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 18 40) no Hoare annotation was computed. [2021-05-02 16:38:57,607 INFO L198 CegarLoopUtils]: For program point L37(line 37) no Hoare annotation was computed. [2021-05-02 16:38:57,607 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 9 15) the Hoare annotation is: true [2021-05-02 16:38:57,607 INFO L198 CegarLoopUtils]: For program point L11(lines 11 12) no Hoare annotation was computed. [2021-05-02 16:38:57,607 INFO L198 CegarLoopUtils]: For program point L10(lines 10 13) no Hoare annotation was computed. [2021-05-02 16:38:57,607 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 9 15) no Hoare annotation was computed. [2021-05-02 16:38:57,607 INFO L198 CegarLoopUtils]: For program point L10-2(lines 9 15) no Hoare annotation was computed. [2021-05-02 16:38:57,607 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2021-05-02 16:38:57,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 04:38:57 BoogieIcfgContainer [2021-05-02 16:38:57,616 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 16:38:57,617 INFO L168 Benchmark]: Toolchain (without parser) took 3699.89 ms. Allocated memory was 224.4 MB in the beginning and 317.7 MB in the end (delta: 93.3 MB). Free memory was 189.4 MB in the beginning and 261.5 MB in the end (delta: -72.0 MB). Peak memory consumption was 21.7 MB. Max. memory is 8.0 GB. [2021-05-02 16:38:57,617 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 224.4 MB. Free memory is still 206.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 16:38:57,617 INFO L168 Benchmark]: CACSL2BoogieTranslator took 139.20 ms. Allocated memory is still 224.4 MB. Free memory was 189.3 MB in the beginning and 179.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 16:38:57,617 INFO L168 Benchmark]: Boogie Preprocessor took 41.31 ms. Allocated memory is still 224.4 MB. Free memory was 179.6 MB in the beginning and 208.2 MB in the end (delta: -28.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-05-02 16:38:57,617 INFO L168 Benchmark]: RCFGBuilder took 207.36 ms. Allocated memory is still 224.4 MB. Free memory was 208.2 MB in the beginning and 193.7 MB in the end (delta: 14.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-05-02 16:38:57,617 INFO L168 Benchmark]: TraceAbstraction took 3307.53 ms. Allocated memory was 224.4 MB in the beginning and 317.7 MB in the end (delta: 93.3 MB). Free memory was 193.1 MB in the beginning and 261.5 MB in the end (delta: -68.3 MB). Peak memory consumption was 26.6 MB. Max. memory is 8.0 GB. [2021-05-02 16:38:57,618 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 224.4 MB. Free memory is still 206.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 139.20 ms. Allocated memory is still 224.4 MB. Free memory was 189.3 MB in the beginning and 179.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 41.31 ms. Allocated memory is still 224.4 MB. Free memory was 179.6 MB in the beginning and 208.2 MB in the end (delta: -28.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 207.36 ms. Allocated memory is still 224.4 MB. Free memory was 208.2 MB in the beginning and 193.7 MB in the end (delta: 14.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3307.53 ms. Allocated memory was 224.4 MB in the beginning and 317.7 MB in the end (delta: 93.3 MB). Free memory was 193.1 MB in the beginning and 261.5 MB in the end (delta: -68.3 MB). Peak memory consumption was 26.6 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 6 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3121.6ms, OverallIterations: 8, TraceHistogramMax: 4, EmptinessCheckTime: 24.9ms, AutomataDifference: 352.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 139.9ms, InitialAbstractionConstructionTime: 7.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 142 SDtfs, 54 SDslu, 367 SDs, 0 SdLazy, 195 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 137.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 162 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 194.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=7, InterpolantAutomatonStates: 48, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 57.0ms AutomataMinimizationTime, 8 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 8 LocationsWithAnnotation, 20 PreInvPairs, 32 NumberOfFragments, 89 HoareAnnotationTreeSize, 20 FomulaSimplifications, 121 FormulaSimplificationTreeSizeReduction, 57.3ms HoareSimplificationTime, 8 FomulaSimplificationsInter, 199 FormulaSimplificationTreeSizeReductionInter, 76.3ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 54.8ms SsaConstructionTime, 140.1ms SatisfiabilityAnalysisTime, 629.4ms InterpolantComputationTime, 167 NumberOfCodeBlocks, 151 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 159 ConstructedInterpolants, 0 QuantifiedInterpolants, 486 SizeOfPredicates, 13 NumberOfNonLiveVariables, 882 ConjunctsInSsa, 88 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 46/79 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 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: !(\old(counter) <= 0) || y * y + y == x * 2 RESULT: Ultimate proved your program to be correct! Received shutdown request...