/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/hard-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 06:58:15,186 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 06:58:15,188 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 06:58:15,224 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 06:58:15,224 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 06:58:15,227 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 06:58:15,230 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 06:58:15,238 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 06:58:15,240 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 06:58:15,244 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 06:58:15,245 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 06:58:15,246 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 06:58:15,246 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 06:58:15,248 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 06:58:15,249 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 06:58:15,251 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 06:58:15,253 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 06:58:15,254 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 06:58:15,256 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 06:58:15,261 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 06:58:15,263 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 06:58:15,264 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 06:58:15,265 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 06:58:15,267 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 06:58:15,273 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 06:58:15,283 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 06:58:15,284 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 06:58:15,284 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 06:58:15,285 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 06:58:15,324 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 06:58:15,324 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 06:58:15,327 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 06:58:15,327 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 06:58:15,327 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 06:58:15,328 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 06:58:15,328 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 06:58:15,328 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 06:58:15,329 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 06:58:15,329 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 06:58:15,330 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 06:58:15,330 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 06:58:15,330 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 06:58:15,330 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 06:58:15,331 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 06:58:15,331 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 06:58:15,331 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 06:58:15,331 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 06:58:15,331 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 06:58:15,332 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 06:58:15,332 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 06:58:15,333 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 06:58:15,333 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 06:58:15,643 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 06:58:15,664 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 06:58:15,667 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 06:58:15,668 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 06:58:15,668 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 06:58:15,669 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/hard-u.c [2021-05-06 06:58:15,733 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b32a6d7a7/9697d2c120e4471487dd2f27e5764206/FLAG57e33be8b [2021-05-06 06:58:16,150 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 06:58:16,151 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/hard-u.c [2021-05-06 06:58:16,157 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b32a6d7a7/9697d2c120e4471487dd2f27e5764206/FLAG57e33be8b [2021-05-06 06:58:16,520 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b32a6d7a7/9697d2c120e4471487dd2f27e5764206 [2021-05-06 06:58:16,522 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 06:58:16,524 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 06:58:16,525 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 06:58:16,525 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 06:58:16,541 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 06:58:16,541 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 06:58:16" (1/1) ... [2021-05-06 06:58:16,542 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4745af06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:58:16, skipping insertion in model container [2021-05-06 06:58:16,543 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 06:58:16" (1/1) ... [2021-05-06 06:58:16,549 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 06:58:16,563 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 06:58:16,662 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/hard-u.c[545,558] [2021-05-06 06:58:16,676 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 06:58:16,683 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 06:58:16,694 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/hard-u.c[545,558] [2021-05-06 06:58:16,701 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 06:58:16,712 INFO L208 MainTranslator]: Completed translation [2021-05-06 06:58:16,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:58:16 WrapperNode [2021-05-06 06:58:16,713 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 06:58:16,714 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 06:58:16,714 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 06:58:16,714 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 06:58:16,724 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:58:16" (1/1) ... [2021-05-06 06:58:16,724 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:58:16" (1/1) ... [2021-05-06 06:58:16,736 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:58:16" (1/1) ... [2021-05-06 06:58:16,736 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:58:16" (1/1) ... [2021-05-06 06:58:16,741 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:58:16" (1/1) ... [2021-05-06 06:58:16,745 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:58:16" (1/1) ... [2021-05-06 06:58:16,746 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:58:16" (1/1) ... [2021-05-06 06:58:16,748 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 06:58:16,749 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 06:58:16,749 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 06:58:16,749 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 06:58:16,759 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:58:16" (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 06:58:16,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 06:58:16,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 06:58:16,851 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 06:58:16,852 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 06:58:16,852 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 06:58:16,852 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 06:58:16,852 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 06:58:16,853 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 06:58:16,853 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 06:58:16,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 06:58:16,854 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 06:58:16,854 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 06:58:16,854 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 06:58:16,854 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 06:58:16,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 06:58:16,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 06:58:16,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 06:58:16,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 06:58:16,856 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 06:58:16,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 06:58:17,197 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 06:58:17,197 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 06:58:17,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 06:58:17 BoogieIcfgContainer [2021-05-06 06:58:17,210 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 06:58:17,211 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 06:58:17,211 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 06:58:17,211 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 06:58:17,213 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 06:58:17" (1/1) ... [2021-05-06 06:58:17,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 06:58:17 BasicIcfg [2021-05-06 06:58:17,226 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 06:58:17,227 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 06:58:17,227 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 06:58:17,230 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 06:58:17,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 06:58:16" (1/4) ... [2021-05-06 06:58:17,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c4deb46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 06:58:17, skipping insertion in model container [2021-05-06 06:58:17,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:58:16" (2/4) ... [2021-05-06 06:58:17,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c4deb46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 06:58:17, skipping insertion in model container [2021-05-06 06:58:17,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 06:58:17" (3/4) ... [2021-05-06 06:58:17,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c4deb46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 06:58:17, skipping insertion in model container [2021-05-06 06:58:17,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 06:58:17" (4/4) ... [2021-05-06 06:58:17,233 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u.cJordan [2021-05-06 06:58:17,237 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 06:58:17,240 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 06:58:17,253 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 06:58:17,270 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 06:58:17,271 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 06:58:17,271 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 06:58:17,271 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 06:58:17,271 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 06:58:17,271 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 06:58:17,271 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 06:58:17,271 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 06:58:17,283 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 06:58:17,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 06:58:17,290 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:58:17,291 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 06:58:17,291 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:58:17,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:58:17,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1625753047, now seen corresponding path program 1 times [2021-05-06 06:58:17,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:58:17,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046437619] [2021-05-06 06:58:17,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:58:17,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:58:17,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:58:17,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:58:17,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 06:58:17,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:58:17,491 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 06:58:17,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:58:17,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046437619] [2021-05-06 06:58:17,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046437619] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 06:58:17,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 06:58:17,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 06:58:17,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134523949] [2021-05-06 06:58:17,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 06:58:17,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:58:17,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 06:58:17,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 06:58:17,511 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 06:58:17,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:58:17,644 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2021-05-06 06:58:17,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 06:58:17,647 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 06:58:17,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:58:17,653 INFO L225 Difference]: With dead ends: 35 [2021-05-06 06:58:17,653 INFO L226 Difference]: Without dead ends: 30 [2021-05-06 06:58:17,655 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 06:58:17,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-06 06:58:17,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-06 06:58:17,684 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 06:58:17,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2021-05-06 06:58:17,686 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2021-05-06 06:58:17,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:58:17,687 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2021-05-06 06:58:17,687 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 06:58:17,687 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2021-05-06 06:58:17,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 06:58:17,688 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:58:17,688 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 06:58:17,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 06:58:17,688 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:58:17,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:58:17,689 INFO L82 PathProgramCache]: Analyzing trace with hash 861759786, now seen corresponding path program 1 times [2021-05-06 06:58:17,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:58:17,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237044081] [2021-05-06 06:58:17,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:58:17,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:58:17,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:58:17,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:58:17,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 06:58:17,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:58:17,950 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 06:58:17,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:58:17,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237044081] [2021-05-06 06:58:17,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237044081] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 06:58:17,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 06:58:17,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 06:58:17,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955693904] [2021-05-06 06:58:17,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 06:58:17,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:58:17,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 06:58:17,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 06:58:17,953 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 06:58:18,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:58:18,409 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2021-05-06 06:58:18,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 06:58:18,410 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 06:58:18,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:58:18,413 INFO L225 Difference]: With dead ends: 41 [2021-05-06 06:58:18,413 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 06:58:18,415 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 297.6ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 06:58:18,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 06:58:18,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2021-05-06 06:58:18,427 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 06:58:18,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-05-06 06:58:18,433 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 17 [2021-05-06 06:58:18,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:58:18,433 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-05-06 06:58:18,434 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 06:58:18,434 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-05-06 06:58:18,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 06:58:18,435 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:58:18,436 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 06:58:18,439 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 06:58:18,439 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:58:18,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:58:18,441 INFO L82 PathProgramCache]: Analyzing trace with hash 325569287, now seen corresponding path program 1 times [2021-05-06 06:58:18,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:58:18,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969061347] [2021-05-06 06:58:18,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:58:18,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:58:18,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:58:18,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:58:18,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 06:58:18,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:58:18,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-05-06 06:58:18,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:58:18,596 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 06:58:18,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:58:18,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969061347] [2021-05-06 06:58:18,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969061347] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 06:58:18,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 06:58:18,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 06:58:18,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190314683] [2021-05-06 06:58:18,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 06:58:18,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:58:18,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 06:58:18,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 06:58:18,598 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 06:58:18,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:58:18,917 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2021-05-06 06:58:18,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 06:58:18,918 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 06:58:18,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:58:18,919 INFO L225 Difference]: With dead ends: 45 [2021-05-06 06:58:18,919 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 06:58:18,920 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 174.3ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 06:58:18,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 06:58:18,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2021-05-06 06:58:18,924 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 06:58:18,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-05-06 06:58:18,925 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 22 [2021-05-06 06:58:18,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:58:18,925 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-05-06 06:58:18,926 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 06:58:18,926 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-05-06 06:58:18,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 06:58:18,926 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:58:18,927 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 06:58:18,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 06:58:18,927 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:58:18,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:58:18,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1461652409, now seen corresponding path program 1 times [2021-05-06 06:58:18,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:58:18,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102951161] [2021-05-06 06:58:18,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:58:18,950 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:58:18,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2067449865] [2021-05-06 06:58:18,951 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 06:58:19,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:58:19,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 06:58:19,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:58:19,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:58:19,194 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 06:58:19,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:58:19,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102951161] [2021-05-06 06:58:19,194 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:58:19,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067449865] [2021-05-06 06:58:19,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067449865] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 06:58:19,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 06:58:19,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 06:58:19,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936707671] [2021-05-06 06:58:19,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 06:58:19,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:58:19,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 06:58:19,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 06:58:19,196 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 06:58:21,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:58:21,424 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2021-05-06 06:58:21,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 06:58:21,425 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 06:58:21,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:58:21,426 INFO L225 Difference]: With dead ends: 53 [2021-05-06 06:58:21,426 INFO L226 Difference]: Without dead ends: 52 [2021-05-06 06:58:21,427 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 06:58:21,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-06 06:58:21,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-05-06 06:58:21,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 29 states have (on average 1.206896551724138) internal successors, (35), 31 states have internal predecessors, (35), 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 06:58:21,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2021-05-06 06:58:21,433 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 27 [2021-05-06 06:58:21,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:58:21,433 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2021-05-06 06:58:21,433 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 06:58:21,434 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2021-05-06 06:58:21,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 06:58:21,434 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:58:21,435 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 06:58:21,649 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:58:21,649 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:58:21,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:58:21,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1008917278, now seen corresponding path program 1 times [2021-05-06 06:58:21,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:58:21,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279085151] [2021-05-06 06:58:21,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:58:21,663 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:58:21,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [15695143] [2021-05-06 06:58:21,663 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 06:58:21,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:58:21,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 06:58:21,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:58:21,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:58:21,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:58:21,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:58:21,988 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 06:58:21,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:58:21,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279085151] [2021-05-06 06:58:21,989 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:58:21,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15695143] [2021-05-06 06:58:21,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15695143] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 06:58:21,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 06:58:21,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 06:58:21,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161543374] [2021-05-06 06:58:21,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 06:58:21,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:58:21,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 06:58:21,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 06:58:21,994 INFO L87 Difference]: Start difference. First operand 52 states and 64 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, (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 06:58:22,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:58:22,198 INFO L93 Difference]: Finished difference Result 71 states and 85 transitions. [2021-05-06 06:58:22,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 06:58:22,199 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, (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 06:58:22,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:58:22,200 INFO L225 Difference]: With dead ends: 71 [2021-05-06 06:58:22,200 INFO L226 Difference]: Without dead ends: 70 [2021-05-06 06:58:22,201 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 85.8ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 06:58:22,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-05-06 06:58:22,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2021-05-06 06:58:22,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 41 states have (on average 1.170731707317073) internal successors, (48), 43 states have internal predecessors, (48), 18 states have call successors, (18), 10 states have call predecessors, (18), 9 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 06:58:22,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2021-05-06 06:58:22,207 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 34 [2021-05-06 06:58:22,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:58:22,208 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2021-05-06 06:58:22,208 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, (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 06:58:22,208 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2021-05-06 06:58:22,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 06:58:22,209 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:58:22,209 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 06:58:22,409 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:58:22,410 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:58:22,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:58:22,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1762200840, now seen corresponding path program 1 times [2021-05-06 06:58:22,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:58:22,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980331062] [2021-05-06 06:58:22,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:58:22,420 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:58:22,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1356669341] [2021-05-06 06:58:22,427 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 06:58:22,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:58:22,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 06:58:22,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:58:22,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:58:22,687 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 06:58:22,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:58:22,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980331062] [2021-05-06 06:58:22,688 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 06:58:22,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356669341] [2021-05-06 06:58:22,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356669341] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:58:22,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 06:58:22,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 06:58:22,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799082217] [2021-05-06 06:58:22,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 06:58:22,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:58:22,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 06:58:22,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 06:58:22,690 INFO L87 Difference]: Start difference. First operand 69 states and 82 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 06:58:27,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:58:27,155 INFO L93 Difference]: Finished difference Result 82 states and 100 transitions. [2021-05-06 06:58:27,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 06:58:27,156 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 06:58:27,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:58:27,158 INFO L225 Difference]: With dead ends: 82 [2021-05-06 06:58:27,158 INFO L226 Difference]: Without dead ends: 82 [2021-05-06 06:58:27,158 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.7ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 06:58:27,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-06 06:58:27,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-05-06 06:58:27,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 50 states have internal predecessors, (56), 23 states have call successors, (23), 11 states have call predecessors, (23), 10 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 06:58:27,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 100 transitions. [2021-05-06 06:58:27,166 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 100 transitions. Word has length 44 [2021-05-06 06:58:27,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:58:27,167 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 100 transitions. [2021-05-06 06:58:27,167 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 06:58:27,167 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 100 transitions. [2021-05-06 06:58:27,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 06:58:27,168 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:58:27,168 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 1, 1, 1, 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 06:58:27,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:58:27,376 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:58:27,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:58:27,376 INFO L82 PathProgramCache]: Analyzing trace with hash 582060793, now seen corresponding path program 1 times [2021-05-06 06:58:27,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:58:27,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824057813] [2021-05-06 06:58:27,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:58:27,386 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 06:58:27,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [675988267] [2021-05-06 06:58:27,387 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