/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/hard2_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 09:13:50,757 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 09:13:50,760 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 09:13:50,808 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 09:13:50,833 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 09:13:50,836 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 09:13:50,837 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 09:13:50,839 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 09:13:50,842 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 09:13:50,843 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 09:13:50,849 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 09:13:50,850 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 09:13:50,858 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 09:13:50,859 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 09:13:50,860 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 09:13:50,860 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 09:13:50,862 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 09:13:50,870 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 09:13:50,871 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 09:13:50,872 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 09:13:50,876 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 09:13:50,891 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 09:13:50,892 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 09:13:50,894 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 09:13:50,895 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 09:13:50,895 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 09:13:50,895 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 09:13:50,895 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 09:13:50,895 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 09:13:50,895 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 09:13:50,896 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 09:13:50,896 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 09:13:50,896 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 09:13:50,897 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 09:13:50,897 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 09:13:50,897 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 09:13:50,897 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 09:13:50,897 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 09:13:50,897 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 09:13:50,897 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 09:13:50,898 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 09:13:50,898 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 09:13:50,899 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 09:13:50,899 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 09:13:51,223 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 09:13:51,261 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 09:13:51,264 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 09:13:51,265 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 09:13:51,266 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 09:13:51,266 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound1.c [2021-05-06 09:13:51,339 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8cf247f6/e4501821f74444488435efddf023f131/FLAGc9cd53e8b [2021-05-06 09:13:51,857 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 09:13:51,858 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound1.c [2021-05-06 09:13:51,864 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8cf247f6/e4501821f74444488435efddf023f131/FLAGc9cd53e8b [2021-05-06 09:13:52,340 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8cf247f6/e4501821f74444488435efddf023f131 [2021-05-06 09:13:52,349 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 09:13:52,350 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 09:13:52,352 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 09:13:52,353 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 09:13:52,356 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 09:13:52,357 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 09:13:52" (1/1) ... [2021-05-06 09:13:52,359 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fed373 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:13:52, skipping insertion in model container [2021-05-06 09:13:52,359 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 09:13:52" (1/1) ... [2021-05-06 09:13:52,379 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 09:13:52,395 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 09:13:52,547 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/hard2_valuebound1.c[526,539] [2021-05-06 09:13:52,567 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 09:13:52,576 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 09:13:52,596 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/hard2_valuebound1.c[526,539] [2021-05-06 09:13:52,634 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 09:13:52,647 INFO L208 MainTranslator]: Completed translation [2021-05-06 09:13:52,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:13:52 WrapperNode [2021-05-06 09:13:52,648 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 09:13:52,650 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 09:13:52,650 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 09:13:52,650 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 09:13:52,661 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:13:52" (1/1) ... [2021-05-06 09:13:52,661 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:13:52" (1/1) ... [2021-05-06 09:13:52,668 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:13:52" (1/1) ... [2021-05-06 09:13:52,668 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:13:52" (1/1) ... [2021-05-06 09:13:52,681 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:13:52" (1/1) ... [2021-05-06 09:13:52,686 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:13:52" (1/1) ... [2021-05-06 09:13:52,691 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:13:52" (1/1) ... [2021-05-06 09:13:52,694 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 09:13:52,696 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 09:13:52,696 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 09:13:52,696 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 09:13:52,697 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:13:52" (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 [2021-05-06 09:13:52,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 09:13:52,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 09:13:52,768 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 09:13:52,769 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 09:13:52,769 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 09:13:52,769 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 09:13:52,769 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 09:13:52,769 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 09:13:52,769 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 09:13:52,769 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 09:13:52,769 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 09:13:52,770 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 09:13:52,770 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 09:13:52,770 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 09:13:52,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 09:13:52,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 09:13:52,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 09:13:52,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 09:13:52,771 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 09:13:52,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 09:13:53,109 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 09:13:53,110 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 09:13:53,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:13:53 BoogieIcfgContainer [2021-05-06 09:13:53,111 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 09:13:53,112 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 09:13:53,112 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 09:13:53,112 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 09:13:53,115 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:13:53" (1/1) ... [2021-05-06 09:13:53,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 09:13:53 BasicIcfg [2021-05-06 09:13:53,147 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 09:13:53,148 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 09:13:53,148 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 09:13:53,152 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 09:13:53,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 09:13:52" (1/4) ... [2021-05-06 09:13:53,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@183cda50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 09:13:53, skipping insertion in model container [2021-05-06 09:13:53,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:13:52" (2/4) ... [2021-05-06 09:13:53,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@183cda50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 09:13:53, skipping insertion in model container [2021-05-06 09:13:53,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:13:53" (3/4) ... [2021-05-06 09:13:53,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@183cda50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 09:13:53, skipping insertion in model container [2021-05-06 09:13:53,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 09:13:53" (4/4) ... [2021-05-06 09:13:53,157 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_valuebound1.cJordan [2021-05-06 09:13:53,162 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 09:13:53,167 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 09:13:53,184 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 09:13:53,210 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 09:13:53,210 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 09:13:53,211 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 09:13:53,211 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 09:13:53,211 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 09:13:53,211 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 09:13:53,212 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 09:13:53,212 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 09:13:53,229 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 09:13:53,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 09:13:53,237 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:13:53,237 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:13:53,238 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:13:53,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:13:53,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1625753047, now seen corresponding path program 1 times [2021-05-06 09:13:53,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:13:53,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221500892] [2021-05-06 09:13:53,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:13:53,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:13:53,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:13:53,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:13:53,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 09:13:53,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:13:53,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:13:53,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:13:53,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221500892] [2021-05-06 09:13:53,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221500892] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:13:53,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:13:53,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 09:13:53,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417411977] [2021-05-06 09:13:53,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 09:13:53,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:13:53,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 09:13:53,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 09:13:53,576 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) 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) [2021-05-06 09:13:53,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:13:53,728 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2021-05-06 09:13:53,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 09:13:53,731 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 [2021-05-06 09:13:53,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:13:53,737 INFO L225 Difference]: With dead ends: 35 [2021-05-06 09:13:53,738 INFO L226 Difference]: Without dead ends: 30 [2021-05-06 09:13:53,739 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 75.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 09:13:53,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-06 09:13:53,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-06 09:13:53,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 09:13:53,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2021-05-06 09:13:53,774 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2021-05-06 09:13:53,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:13:53,774 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2021-05-06 09:13:53,774 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) [2021-05-06 09:13:53,774 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2021-05-06 09:13:53,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 09:13:53,775 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:13:53,775 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:13:53,775 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 09:13:53,776 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:13:53,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:13:53,776 INFO L82 PathProgramCache]: Analyzing trace with hash 861759786, now seen corresponding path program 1 times [2021-05-06 09:13:53,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:13:53,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621248191] [2021-05-06 09:13:53,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:13:53,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:13:53,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:13:53,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:13:53,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 09:13:53,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:13:53,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:13:53,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:13:53,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621248191] [2021-05-06 09:13:53,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621248191] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:13:53,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:13:53,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 09:13:53,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238424808] [2021-05-06 09:13:53,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:13:53,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:13:53,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:13:53,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:13:53,896 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 09:13:54,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:13:54,176 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2021-05-06 09:13:54,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:13:54,176 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 09:13:54,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:13:54,177 INFO L225 Difference]: With dead ends: 41 [2021-05-06 09:13:54,178 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 09:13:54,178 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 143.4ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:13:54,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 09:13:54,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2021-05-06 09:13:54,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 09:13:54,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-05-06 09:13:54,186 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 17 [2021-05-06 09:13:54,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:13:54,186 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-05-06 09:13:54,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 09:13:54,186 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-05-06 09:13:54,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 09:13:54,187 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:13:54,187 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:13:54,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 09:13:54,187 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:13:54,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:13:54,188 INFO L82 PathProgramCache]: Analyzing trace with hash 325569287, now seen corresponding path program 1 times [2021-05-06 09:13:54,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:13:54,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154804168] [2021-05-06 09:13:54,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:13:54,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:13:54,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:13:54,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:13:54,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 09:13:54,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:13:54,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-05-06 09:13:54,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:13:54,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:13:54,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:13:54,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154804168] [2021-05-06 09:13:54,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154804168] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:13:54,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:13:54,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 09:13:54,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484368118] [2021-05-06 09:13:54,289 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:13:54,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:13:54,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:13:54,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:13:54,290 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:13:54,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:13:54,558 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2021-05-06 09:13:54,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:13:54,559 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 09:13:54,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:13:54,563 INFO L225 Difference]: With dead ends: 45 [2021-05-06 09:13:54,563 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 09:13:54,564 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 132.1ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:13:54,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 09:13:54,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2021-05-06 09:13:54,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 09:13:54,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-05-06 09:13:54,583 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 22 [2021-05-06 09:13:54,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:13:54,584 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-05-06 09:13:54,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:13:54,584 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-05-06 09:13:54,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 09:13:54,586 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:13:54,586 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:13:54,586 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 09:13:54,586 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:13:54,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:13:54,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1461652409, now seen corresponding path program 1 times [2021-05-06 09:13:54,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:13:54,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561829561] [2021-05-06 09:13:54,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:13:54,617 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:13:54,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [167837920] [2021-05-06 09:13:54,618 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 [2021-05-06 09:13:54,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:13:54,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 09:13:54,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:13:54,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:13:54,868 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 09:13:54,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:13:54,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561829561] [2021-05-06 09:13:54,869 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:13:54,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167837920] [2021-05-06 09:13:54,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167837920] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:13:54,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:13:54,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 09:13:54,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146380533] [2021-05-06 09:13:54,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 09:13:54,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:13:54,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 09:13:54,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 09:13:54,874 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 09:13:54,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:13:54,937 INFO L93 Difference]: Finished difference Result 53 states and 65 transitions. [2021-05-06 09:13:54,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 09:13:54,937 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), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2021-05-06 09:13:54,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:13:54,939 INFO L225 Difference]: With dead ends: 53 [2021-05-06 09:13:54,939 INFO L226 Difference]: Without dead ends: 52 [2021-05-06 09:13:54,939 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:13:54,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-06 09:13:54,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-05-06 09:13:54,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 09:13:54,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2021-05-06 09:13:54,950 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 27 [2021-05-06 09:13:54,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:13:54,950 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2021-05-06 09:13:54,950 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), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 09:13:54,950 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2021-05-06 09:13:54,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 09:13:54,952 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:13:54,952 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:13:55,177 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:13:55,177 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:13:55,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:13:55,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1008917278, now seen corresponding path program 1 times [2021-05-06 09:13:55,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:13:55,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817385639] [2021-05-06 09:13:55,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:13:55,188 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:13:55,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [107549573] [2021-05-06 09:13:55,188 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 [2021-05-06 09:13:55,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:13:55,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 09:13:55,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:13:55,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:13:55,406 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 09:13:55,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:13:55,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817385639] [2021-05-06 09:13:55,408 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:13:55,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107549573] [2021-05-06 09:13:55,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107549573] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:13:55,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:13:55,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 09:13:55,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991816955] [2021-05-06 09:13:55,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 09:13:55,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:13:55,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 09:13:55,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 09:13:55,411 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 09:13:55,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:13:55,472 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2021-05-06 09:13:55,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 09:13:55,473 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-06 09:13:55,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:13:55,474 INFO L225 Difference]: With dead ends: 63 [2021-05-06 09:13:55,475 INFO L226 Difference]: Without dead ends: 58 [2021-05-06 09:13:55,475 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:13:55,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-06 09:13:55,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-05-06 09:13:55,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 35 states have internal predecessors, (39), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 09:13:55,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2021-05-06 09:13:55,493 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 34 [2021-05-06 09:13:55,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:13:55,493 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2021-05-06 09:13:55,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 09:13:55,493 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2021-05-06 09:13:55,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 09:13:55,495 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:13:55,496 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:13:55,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:13:55,721 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:13:55,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:13:55,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1762200840, now seen corresponding path program 1 times [2021-05-06 09:13:55,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:13:55,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951922933] [2021-05-06 09:13:55,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:13:55,731 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:13:55,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1203565492] [2021-05-06 09:13:55,732 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 [2021-05-06 09:13:55,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:13:55,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 09:13:55,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:13:55,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:13:55,940 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 09:13:55,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:13:55,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951922933] [2021-05-06 09:13:55,940 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:13:55,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203565492] [2021-05-06 09:13:55,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203565492] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:13:55,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:13:55,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 09:13:55,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623712458] [2021-05-06 09:13:55,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:13:55,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:13:55,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:13:55,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:13:55,942 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 09:13:56,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:13:56,047 INFO L93 Difference]: Finished difference Result 82 states and 106 transitions. [2021-05-06 09:13:56,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 09:13:56,048 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2021-05-06 09:13:56,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:13:56,053 INFO L225 Difference]: With dead ends: 82 [2021-05-06 09:13:56,053 INFO L226 Difference]: Without dead ends: 76 [2021-05-06 09:13:56,055 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.7ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 09:13:56,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-06 09:13:56,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-05-06 09:13:56,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 46 states have internal predecessors, (50), 24 states have call successors, (24), 9 states have call predecessors, (24), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 09:13:56,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 95 transitions. [2021-05-06 09:13:56,074 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 95 transitions. Word has length 44 [2021-05-06 09:13:56,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:13:56,074 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 95 transitions. [2021-05-06 09:13:56,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 09:13:56,075 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 95 transitions. [2021-05-06 09:13:56,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 09:13:56,078 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:13:56,079 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:13:56,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:13:56,280 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:13:56,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:13:56,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1665528729, now seen corresponding path program 2 times [2021-05-06 09:13:56,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:13:56,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092058210] [2021-05-06 09:13:56,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:13:56,288 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:13:56,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [783450047] [2021-05-06 09:13:56,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:13:56,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 09:13:56,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:13:56,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 09:13:56,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:13:56,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:13:56,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:13:56,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:13:56,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:13:56,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:13:56,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:13:56,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:13:56,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:13:56,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:13:56,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:13:56,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:13:56,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:13:56,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:13:56,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:13:56,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:13:56,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:13:56,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:13:56,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:13:56,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:13:56,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:13:56,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:13:56,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:13:56,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:13:56,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:13:56,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:13:56,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:13:56,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:13:56,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:13:56,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:13:56,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:13:56,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:13:56,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:13:56,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:13:56,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:13:56,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:13:56,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:13:56,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:13:56,614 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-05-06 09:13:56,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:13:56,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092058210] [2021-05-06 09:13:56,615 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:13:56,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783450047] [2021-05-06 09:13:56,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783450047] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:13:56,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:13:56,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-06 09:13:56,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072020990] [2021-05-06 09:13:56,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 09:13:56,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:13:56,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 09:13:56,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 09:13:56,616 INFO L87 Difference]: Start difference. First operand 76 states and 95 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 09:13:56,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:13:56,697 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2021-05-06 09:13:56,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:13:56,698 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 61 [2021-05-06 09:13:56,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:13:56,698 INFO L225 Difference]: With dead ends: 58 [2021-05-06 09:13:56,698 INFO L226 Difference]: Without dead ends: 58 [2021-05-06 09:13:56,699 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 57.4ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:13:56,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-06 09:13:56,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-06 09:13:56,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 36 states have internal predecessors, (36), 14 states have call successors, (14), 9 states have call predecessors, (14), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 09:13:56,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2021-05-06 09:13:56,702 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 61 [2021-05-06 09:13:56,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:13:56,702 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2021-05-06 09:13:56,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 09:13:56,703 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2021-05-06 09:13:56,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-06 09:13:56,703 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:13:56,703 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:13:56,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:13:56,913 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:13:56,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:13:56,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1382136022, now seen corresponding path program 1 times [2021-05-06 09:13:56,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:13:56,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882445885] [2021-05-06 09:13:56,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:13:56,922 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:13:56,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1749220701] [2021-05-06 09:13:56,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:13:57,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:13:57,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 09:13:57,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:13:57,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:13:57,235 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-05-06 09:13:57,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:13:57,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882445885] [2021-05-06 09:13:57,235 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:13:57,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749220701] [2021-05-06 09:13:57,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749220701] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:13:57,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:13:57,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 09:13:57,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105348254] [2021-05-06 09:13:57,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 09:13:57,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:13:57,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 09:13:57,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 09:13:57,238 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 09:13:57,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:13:57,356 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2021-05-06 09:13:57,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:13:57,357 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 64 [2021-05-06 09:13:57,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:13:57,360 INFO L225 Difference]: With dead ends: 66 [2021-05-06 09:13:57,361 INFO L226 Difference]: Without dead ends: 64 [2021-05-06 09:13:57,361 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.1ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:13:57,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-06 09:13:57,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-06 09:13:57,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 40 states have (on average 1.0) internal successors, (40), 40 states have internal predecessors, (40), 14 states have call successors, (14), 11 states have call predecessors, (14), 9 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 09:13:57,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2021-05-06 09:13:57,374 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 64 [2021-05-06 09:13:57,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:13:57,374 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2021-05-06 09:13:57,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 09:13:57,374 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2021-05-06 09:13:57,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-06 09:13:57,375 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:13:57,375 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:13:57,594 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:13:57,594 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:13:57,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:13:57,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1085940318, now seen corresponding path program 1 times [2021-05-06 09:13:57,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:13:57,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166952389] [2021-05-06 09:13:57,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:13:57,612 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:13:57,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1385827511] [2021-05-06 09:13:57,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:13:57,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:13:57,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 09:13:57,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:13:57,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:13:57,902 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-05-06 09:13:57,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:13:57,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166952389] [2021-05-06 09:13:57,902 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:13:57,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385827511] [2021-05-06 09:13:57,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385827511] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:13:57,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:13:57,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 09:13:57,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290587594] [2021-05-06 09:13:57,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 09:13:57,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:13:57,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 09:13:57,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:13:57,904 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 09:13:58,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:13:58,007 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2021-05-06 09:13:58,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:13:58,008 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2021-05-06 09:13:58,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:13:58,009 INFO L225 Difference]: With dead ends: 62 [2021-05-06 09:13:58,009 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 09:13:58,009 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 53.2ms TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 09:13:58,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 09:13:58,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 09:13:58,009 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) [2021-05-06 09:13:58,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 09:13:58,009 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 75 [2021-05-06 09:13:58,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:13:58,010 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 09:13:58,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 09:13:58,010 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 09:13:58,010 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 09:13:58,224 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:13:58,228 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 09:13:58 BasicIcfg [2021-05-06 09:13:58,228 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 09:13:58,229 INFO L168 Benchmark]: Toolchain (without parser) took 5878.67 ms. Allocated memory was 198.2 MB in the beginning and 238.0 MB in the end (delta: 39.8 MB). Free memory was 163.2 MB in the beginning and 141.9 MB in the end (delta: 21.3 MB). Peak memory consumption was 61.8 MB. Max. memory is 8.0 GB. [2021-05-06 09:13:58,229 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 198.2 MB. Free memory was 180.2 MB in the beginning and 180.1 MB in the end (delta: 105.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 09:13:58,229 INFO L168 Benchmark]: CACSL2BoogieTranslator took 295.47 ms. Allocated memory is still 198.2 MB. Free memory was 163.0 MB in the beginning and 181.6 MB in the end (delta: -18.6 MB). Peak memory consumption was 11.9 MB. Max. memory is 8.0 GB. [2021-05-06 09:13:58,229 INFO L168 Benchmark]: Boogie Preprocessor took 44.34 ms. Allocated memory is still 198.2 MB. Free memory was 181.6 MB in the beginning and 180.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 09:13:58,229 INFO L168 Benchmark]: RCFGBuilder took 415.36 ms. Allocated memory is still 198.2 MB. Free memory was 179.9 MB in the beginning and 164.8 MB in the end (delta: 15.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-06 09:13:58,229 INFO L168 Benchmark]: IcfgTransformer took 35.21 ms. Allocated memory is still 198.2 MB. Free memory was 164.8 MB in the beginning and 163.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 09:13:58,229 INFO L168 Benchmark]: TraceAbstraction took 5080.26 ms. Allocated memory was 198.2 MB in the beginning and 238.0 MB in the end (delta: 39.8 MB). Free memory was 163.1 MB in the beginning and 141.9 MB in the end (delta: 21.2 MB). Peak memory consumption was 61.5 MB. Max. memory is 8.0 GB. [2021-05-06 09:13:58,230 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 198.2 MB. Free memory was 180.2 MB in the beginning and 180.1 MB in the end (delta: 105.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 295.47 ms. Allocated memory is still 198.2 MB. Free memory was 163.0 MB in the beginning and 181.6 MB in the end (delta: -18.6 MB). Peak memory consumption was 11.9 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 44.34 ms. Allocated memory is still 198.2 MB. Free memory was 181.6 MB in the beginning and 180.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 415.36 ms. Allocated memory is still 198.2 MB. Free memory was 179.9 MB in the beginning and 164.8 MB in the end (delta: 15.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 35.21 ms. Allocated memory is still 198.2 MB. Free memory was 164.8 MB in the beginning and 163.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5080.26 ms. Allocated memory was 198.2 MB in the beginning and 238.0 MB in the end (delta: 39.8 MB). Free memory was 163.1 MB in the beginning and 141.9 MB in the end (delta: 21.2 MB). Peak memory consumption was 61.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: 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, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5017.3ms, OverallIterations: 9, TraceHistogramMax: 11, EmptinessCheckTime: 25.0ms, AutomataDifference: 1290.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 308 SDtfs, 142 SDslu, 817 SDs, 0 SdLazy, 588 SolverSat, 111 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 657.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 342 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 575.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=76occurred in iteration=6, InterpolantAutomatonStates: 54, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 110.8ms AutomataMinimizationTime, 9 MinimizatonAttempts, 15 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 83.0ms SsaConstructionTime, 223.0ms SatisfiabilityAnalysisTime, 1497.1ms InterpolantComputationTime, 361 NumberOfCodeBlocks, 361 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 352 ConstructedInterpolants, 0 QuantifiedInterpolants, 1268 SizeOfPredicates, 13 NumberOfNonLiveVariables, 1020 ConjunctsInSsa, 93 ConjunctsInUnsatCore, 9 InterpolantComputations, 6 PerfectInterpolantSequences, 547/567 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...