/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/ps6-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 07:08:12,107 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 07:08:12,110 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 07:08:12,142 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 07:08:12,142 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 07:08:12,145 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 07:08:12,147 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 07:08:12,151 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 07:08:12,153 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 07:08:12,157 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 07:08:12,157 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 07:08:12,158 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 07:08:12,158 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 07:08:12,160 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 07:08:12,161 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 07:08:12,162 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 07:08:12,164 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 07:08:12,165 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 07:08:12,167 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 07:08:12,171 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 07:08:12,172 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 07:08:12,173 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 07:08:12,173 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 07:08:12,175 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 07:08:12,180 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 07:08:12,189 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 07:08:12,190 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 07:08:12,190 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 07:08:12,194 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 07:08:12,208 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 07:08:12,208 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 07:08:12,211 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 07:08:12,211 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 07:08:12,211 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 07:08:12,211 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 07:08:12,211 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 07:08:12,212 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 07:08:12,212 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 07:08:12,212 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 07:08:12,212 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 07:08:12,213 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 07:08:12,213 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 07:08:12,213 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 07:08:12,213 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 07:08:12,213 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 07:08:12,213 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 07:08:12,213 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 07:08:12,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 07:08:12,214 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 07:08:12,214 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 07:08:12,224 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 07:08:12,224 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 07:08:12,515 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 07:08:12,530 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 07:08:12,532 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 07:08:12,532 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 07:08:12,533 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 07:08:12,533 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps6-ll.c [2021-05-06 07:08:12,588 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3f3a9ef8/fe8362d63ef84ee484213acb378e9eaa/FLAG5ce0b75ab [2021-05-06 07:08:12,975 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 07:08:12,975 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps6-ll.c [2021-05-06 07:08:12,981 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3f3a9ef8/fe8362d63ef84ee484213acb378e9eaa/FLAG5ce0b75ab [2021-05-06 07:08:12,996 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3f3a9ef8/fe8362d63ef84ee484213acb378e9eaa [2021-05-06 07:08:12,999 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 07:08:13,000 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 07:08:13,004 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 07:08:13,005 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 07:08:13,008 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 07:08:13,008 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:08:12" (1/1) ... [2021-05-06 07:08:13,009 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3da040f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:08:13, skipping insertion in model container [2021-05-06 07:08:13,009 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:08:12" (1/1) ... [2021-05-06 07:08:13,013 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 07:08:13,025 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 07:08:13,144 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/ps6-ll.c[458,471] [2021-05-06 07:08:13,163 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:08:13,172 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 07:08:13,181 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/ps6-ll.c[458,471] [2021-05-06 07:08:13,200 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:08:13,211 INFO L208 MainTranslator]: Completed translation [2021-05-06 07:08:13,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:08:13 WrapperNode [2021-05-06 07:08:13,211 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 07:08:13,212 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 07:08:13,212 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 07:08:13,213 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 07:08:13,253 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:08:13" (1/1) ... [2021-05-06 07:08:13,253 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:08:13" (1/1) ... [2021-05-06 07:08:13,260 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:08:13" (1/1) ... [2021-05-06 07:08:13,260 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:08:13" (1/1) ... [2021-05-06 07:08:13,269 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:08:13" (1/1) ... [2021-05-06 07:08:13,273 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:08:13" (1/1) ... [2021-05-06 07:08:13,275 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:08:13" (1/1) ... [2021-05-06 07:08:13,279 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 07:08:13,281 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 07:08:13,281 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 07:08:13,281 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 07:08:13,282 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:08:13" (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 07:08:13,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 07:08:13,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 07:08:13,373 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 07:08:13,373 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 07:08:13,373 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 07:08:13,373 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 07:08:13,373 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 07:08:13,373 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 07:08:13,374 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 07:08:13,374 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 07:08:13,374 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-06 07:08:13,374 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 07:08:13,374 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 07:08:13,374 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 07:08:13,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 07:08:13,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 07:08:13,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 07:08:13,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 07:08:13,375 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 07:08:13,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 07:08:13,569 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 07:08:13,569 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 07:08:13,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:08:13 BoogieIcfgContainer [2021-05-06 07:08:13,570 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 07:08:13,570 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 07:08:13,571 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 07:08:13,571 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 07:08:13,573 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:08:13" (1/1) ... [2021-05-06 07:08:13,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:08:13 BasicIcfg [2021-05-06 07:08:13,581 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 07:08:13,582 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 07:08:13,582 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 07:08:13,584 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 07:08:13,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 07:08:12" (1/4) ... [2021-05-06 07:08:13,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@458212df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:08:13, skipping insertion in model container [2021-05-06 07:08:13,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:08:13" (2/4) ... [2021-05-06 07:08:13,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@458212df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:08:13, skipping insertion in model container [2021-05-06 07:08:13,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:08:13" (3/4) ... [2021-05-06 07:08:13,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@458212df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:08:13, skipping insertion in model container [2021-05-06 07:08:13,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:08:13" (4/4) ... [2021-05-06 07:08:13,586 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll.cJordan [2021-05-06 07:08:13,589 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 07:08:13,591 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 07:08:13,601 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 07:08:13,612 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 07:08:13,612 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 07:08:13,612 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 07:08:13,612 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 07:08:13,612 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 07:08:13,612 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 07:08:13,612 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 07:08:13,613 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 07:08:13,620 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 07:08:13,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 07:08:13,624 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:08:13,624 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 07:08:13,625 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:08:13,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:08:13,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1885409022, now seen corresponding path program 1 times [2021-05-06 07:08:13,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:08:13,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355266260] [2021-05-06 07:08:13,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:08:13,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:08:13,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 07:08:13,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:08:13,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 07:08:13,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:08:13,853 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 07:08:13,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:08:13,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355266260] [2021-05-06 07:08:13,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355266260] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:08:13,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:08:13,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 07:08:13,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070935705] [2021-05-06 07:08:13,858 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 07:08:13,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:08:13,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 07:08:13,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:08:13,867 INFO L87 Difference]: Start difference. First operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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 07:08:13,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:08:13,957 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-05-06 07:08:13,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 07:08:13,959 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 07:08:13,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:08:13,963 INFO L225 Difference]: With dead ends: 28 [2021-05-06 07:08:13,963 INFO L226 Difference]: Without dead ends: 23 [2021-05-06 07:08:13,981 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:08:13,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-06 07:08:14,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-06 07:08:14,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 07:08:14,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-05-06 07:08:14,006 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 17 [2021-05-06 07:08:14,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:08:14,007 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-05-06 07:08:14,007 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 07:08:14,007 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-05-06 07:08:14,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 07:08:14,007 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:08:14,007 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 07:08:14,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 07:08:14,008 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:08:14,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:08:14,008 INFO L82 PathProgramCache]: Analyzing trace with hash 603980644, now seen corresponding path program 1 times [2021-05-06 07:08:14,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:08:14,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363326476] [2021-05-06 07:08:14,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:08:14,048 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:08:14,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1642601394] [2021-05-06 07:08:14,048 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 07:08:14,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:08:14,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 07:08:14,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:08:14,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:14,282 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 07:08:14,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:08:14,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363326476] [2021-05-06 07:08:14,282 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:08:14,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642601394] [2021-05-06 07:08:14,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642601394] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:08:14,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:08:14,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 07:08:14,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860188078] [2021-05-06 07:08:14,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:08:14,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:08:14,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:08:14,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:08:14,288 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 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 07:08:14,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:08:14,333 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-05-06 07:08:14,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 07:08:14,334 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 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 07:08:14,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:08:14,335 INFO L225 Difference]: With dead ends: 32 [2021-05-06 07:08:14,335 INFO L226 Difference]: Without dead ends: 30 [2021-05-06 07:08:14,336 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:08:14,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-06 07:08:14,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-06 07:08:14,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 07:08:14,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-05-06 07:08:14,346 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 17 [2021-05-06 07:08:14,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:08:14,350 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-05-06 07:08:14,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 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 07:08:14,351 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-05-06 07:08:14,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 07:08:14,352 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:08:14,352 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:08:14,571 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 07:08:14,572 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:08:14,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:08:14,573 INFO L82 PathProgramCache]: Analyzing trace with hash -169450186, now seen corresponding path program 1 times [2021-05-06 07:08:14,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:08:14,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410249927] [2021-05-06 07:08:14,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:08:14,582 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:08:14,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [529429200] [2021-05-06 07:08:14,583 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 07:08:14,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:08:14,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 07:08:14,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:08:14,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:14,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:08:14,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:08:14,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410249927] [2021-05-06 07:08:14,751 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:08:14,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529429200] [2021-05-06 07:08:14,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529429200] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:08:14,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:08:14,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 07:08:14,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041632343] [2021-05-06 07:08:14,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:08:14,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:08:14,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:08:14,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:08:14,752 INFO L87 Difference]: Start difference. First operand 30 states and 32 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, (5), 2 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 07:08:14,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:08:14,795 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2021-05-06 07:08:14,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:08:14,796 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, (5), 2 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 24 [2021-05-06 07:08:14,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:08:14,797 INFO L225 Difference]: With dead ends: 39 [2021-05-06 07:08:14,797 INFO L226 Difference]: Without dead ends: 39 [2021-05-06 07:08:14,797 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.1ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:08:14,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-06 07:08:14,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-05-06 07:08:14,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 07:08:14,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-05-06 07:08:14,801 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 24 [2021-05-06 07:08:14,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:08:14,802 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-05-06 07:08:14,802 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, (5), 2 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 07:08:14,802 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-05-06 07:08:14,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-06 07:08:14,802 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:08:14,803 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:08:15,023 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:08:15,024 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:08:15,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:08:15,024 INFO L82 PathProgramCache]: Analyzing trace with hash -570969308, now seen corresponding path program 2 times [2021-05-06 07:08:15,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:08:15,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950292083] [2021-05-06 07:08:15,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:08:15,033 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:08:15,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [321971956] [2021-05-06 07:08:15,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:08:15,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 07:08:15,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:08:15,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 07:08:15,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:08:15,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:15,201 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:08:15,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:08:15,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950292083] [2021-05-06 07:08:15,202 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:08:15,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321971956] [2021-05-06 07:08:15,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321971956] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:08:15,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:08:15,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 07:08:15,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794976932] [2021-05-06 07:08:15,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 07:08:15,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:08:15,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 07:08:15,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:08:15,203 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 07:08:15,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:08:15,280 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2021-05-06 07:08:15,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 07:08:15,281 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2021-05-06 07:08:15,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:08:15,282 INFO L225 Difference]: With dead ends: 48 [2021-05-06 07:08:15,282 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 07:08:15,282 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.8ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:08:15,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 07:08:15,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-05-06 07:08:15,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 07:08:15,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2021-05-06 07:08:15,286 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 31 [2021-05-06 07:08:15,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:08:15,287 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2021-05-06 07:08:15,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 07:08:15,287 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2021-05-06 07:08:15,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-06 07:08:15,288 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:08:15,288 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:08:15,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:08:15,493 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:08:15,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:08:15,494 INFO L82 PathProgramCache]: Analyzing trace with hash -124222480, now seen corresponding path program 1 times [2021-05-06 07:08:15,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:08:15,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312708115] [2021-05-06 07:08:15,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:08:15,502 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:08:15,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1732272097] [2021-05-06 07:08:15,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:08:15,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:08:15,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 07:08:15,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:08:15,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:15,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:15,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:15,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:15,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:15,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:15,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:15,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:15,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:15,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:15,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:15,678 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 07:08:15,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:08:15,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312708115] [2021-05-06 07:08:15,678 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:08:15,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732272097] [2021-05-06 07:08:15,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732272097] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:08:15,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:08:15,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 07:08:15,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924223535] [2021-05-06 07:08:15,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 07:08:15,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:08:15,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 07:08:15,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:08:15,680 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 07:08:15,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:08:15,727 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2021-05-06 07:08:15,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 07:08:15,728 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 35 [2021-05-06 07:08:15,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:08:15,730 INFO L225 Difference]: With dead ends: 51 [2021-05-06 07:08:15,730 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 07:08:15,730 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 37.0ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 07:08:15,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 07:08:15,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-06 07:08:15,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 30 states have internal predecessors, (31), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 07:08:15,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-05-06 07:08:15,734 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 35 [2021-05-06 07:08:15,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:08:15,735 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-05-06 07:08:15,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 07:08:15,735 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-05-06 07:08:15,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 07:08:15,736 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:08:15,736 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:08:15,955 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:08:15,955 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:08:15,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:08:15,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1050508662, now seen corresponding path program 3 times [2021-05-06 07:08:15,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:08:15,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509638823] [2021-05-06 07:08:15,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:08:15,964 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:08:15,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [379284066] [2021-05-06 07:08:15,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 07:08:17,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 07:08:17,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:08:17,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 07:08:17,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:08:18,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:18,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:18,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:18,514 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-06 07:08:18,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:08:18,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509638823] [2021-05-06 07:08:18,514 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:08:18,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379284066] [2021-05-06 07:08:18,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379284066] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:08:18,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:08:18,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 07:08:18,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790097283] [2021-05-06 07:08:18,515 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 07:08:18,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:08:18,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 07:08:18,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:08:18,516 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 07:08:18,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:08:18,609 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2021-05-06 07:08:18,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 07:08:18,610 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), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 38 [2021-05-06 07:08:18,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:08:18,610 INFO L225 Difference]: With dead ends: 49 [2021-05-06 07:08:18,610 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 07:08:18,611 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1447.1ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 07:08:18,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 07:08:18,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2021-05-06 07:08:18,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 07:08:18,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-05-06 07:08:18,614 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 38 [2021-05-06 07:08:18,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:08:18,614 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-05-06 07:08:18,614 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), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 07:08:18,614 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-05-06 07:08:18,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 07:08:18,615 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:08:18,615 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:08:18,815 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-06 07:08:18,816 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:08:18,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:08:18,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1580411582, now seen corresponding path program 2 times [2021-05-06 07:08:18,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:08:18,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844488646] [2021-05-06 07:08:18,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:08:18,824 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:08:18,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1508322435] [2021-05-06 07:08:18,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:08:18,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 07:08:18,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:08:18,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 07:08:18,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:08:18,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:18,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:18,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:18,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:18,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:18,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:18,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:18,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:18,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:18,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:19,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:19,010 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 07:08:19,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:08:19,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844488646] [2021-05-06 07:08:19,011 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:08:19,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508322435] [2021-05-06 07:08:19,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508322435] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:08:19,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:08:19,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 07:08:19,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137779331] [2021-05-06 07:08:19,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 07:08:19,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:08:19,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 07:08:19,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:08:19,012 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-06 07:08:19,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:08:19,080 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2021-05-06 07:08:19,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 07:08:19,081 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 42 [2021-05-06 07:08:19,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:08:19,081 INFO L225 Difference]: With dead ends: 46 [2021-05-06 07:08:19,081 INFO L226 Difference]: Without dead ends: 42 [2021-05-06 07:08:19,082 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 56.5ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-06 07:08:19,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-06 07:08:19,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-05-06 07:08:19,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 9 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 07:08:19,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2021-05-06 07:08:19,084 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 42 [2021-05-06 07:08:19,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:08:19,084 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2021-05-06 07:08:19,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-06 07:08:19,085 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2021-05-06 07:08:19,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-06 07:08:19,085 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:08:19,085 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:08:19,302 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:08:19,303 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:08:19,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:08:19,303 INFO L82 PathProgramCache]: Analyzing trace with hash 2070660016, now seen corresponding path program 3 times [2021-05-06 07:08:19,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:08:19,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882713770] [2021-05-06 07:08:19,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:08:19,310 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:08:19,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1543866165] [2021-05-06 07:08:19,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:08:19,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 07:08:19,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:08:19,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-06 07:08:19,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:08:20,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:20,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:20,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:20,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:20,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:20,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:20,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:20,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:20,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:20,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:20,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:20,098 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 07:08:20,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:08:20,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882713770] [2021-05-06 07:08:20,098 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:08:20,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543866165] [2021-05-06 07:08:20,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543866165] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:08:20,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:08:20,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 07:08:20,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221994806] [2021-05-06 07:08:20,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 07:08:20,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:08:20,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 07:08:20,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-06 07:08:20,100 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-06 07:08:20,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:08:20,228 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2021-05-06 07:08:20,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 07:08:20,228 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 49 [2021-05-06 07:08:20,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:08:20,229 INFO L225 Difference]: With dead ends: 53 [2021-05-06 07:08:20,229 INFO L226 Difference]: Without dead ends: 49 [2021-05-06 07:08:20,229 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 100.0ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-06 07:08:20,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-06 07:08:20,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-05-06 07:08:20,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 07:08:20,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2021-05-06 07:08:20,232 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 49 [2021-05-06 07:08:20,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:08:20,232 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2021-05-06 07:08:20,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-06 07:08:20,232 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2021-05-06 07:08:20,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-06 07:08:20,233 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:08:20,233 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:08:20,438 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 07:08:20,438 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:08:20,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:08:20,438 INFO L82 PathProgramCache]: Analyzing trace with hash 780557698, now seen corresponding path program 4 times [2021-05-06 07:08:20,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:08:20,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979418240] [2021-05-06 07:08:20,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:08:20,444 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:08:20,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [19033125] [2021-05-06 07:08:20,445 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:08:20,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 07:08:20,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:08:20,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-06 07:08:20,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:08:20,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:20,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:20,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:20,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:20,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:20,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:20,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:20,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:20,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:20,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:20,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:20,712 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 07:08:20,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:08:20,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979418240] [2021-05-06 07:08:20,712 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:08:20,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19033125] [2021-05-06 07:08:20,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19033125] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:08:20,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:08:20,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 07:08:20,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051829422] [2021-05-06 07:08:20,713 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 07:08:20,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:08:20,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 07:08:20,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-06 07:08:20,714 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-05-06 07:08:20,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:08:20,814 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2021-05-06 07:08:20,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 07:08:20,814 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 56 [2021-05-06 07:08:20,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:08:20,815 INFO L225 Difference]: With dead ends: 56 [2021-05-06 07:08:20,815 INFO L226 Difference]: Without dead ends: 52 [2021-05-06 07:08:20,815 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 81.6ms TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-06 07:08:20,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-06 07:08:20,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-05-06 07:08:20,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 11 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 07:08:20,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2021-05-06 07:08:20,818 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 56 [2021-05-06 07:08:20,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:08:20,818 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2021-05-06 07:08:20,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-05-06 07:08:20,819 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2021-05-06 07:08:20,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-06 07:08:20,819 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:08:20,819 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:08:21,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 07:08:21,020 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:08:21,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:08:21,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1957983088, now seen corresponding path program 5 times [2021-05-06 07:08:21,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:08:21,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924128741] [2021-05-06 07:08:21,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:08:21,026 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:08:21,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [141869955] [2021-05-06 07:08:21,027 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true