/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 09:53:14,326 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 09:53:14,328 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 09:53:14,358 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 09:53:14,374 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 09:53:14,375 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 09:53:14,376 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 09:53:14,377 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 09:53:14,379 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 09:53:14,379 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 09:53:14,381 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 09:53:14,385 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 09:53:14,386 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 09:53:14,387 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 09:53:14,388 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 09:53:14,389 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 09:53:14,394 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 09:53:14,401 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 09:53:14,401 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 09:53:14,402 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 09:53:14,405 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 09:53:14,418 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 09:53:14,418 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 09:53:14,420 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 09:53:14,420 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 09:53:14,420 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 09:53:14,420 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 09:53:14,420 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 09:53:14,421 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 09:53:14,421 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 09:53:14,421 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 09:53:14,421 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 09:53:14,422 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 09:53:14,422 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 09:53:14,422 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 09:53:14,422 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 09:53:14,422 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 09:53:14,422 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 09:53:14,422 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 09:53:14,423 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 09:53:14,423 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 09:53:14,423 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 09:53:14,424 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 09:53:14,424 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 09:53:14,701 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 09:53:14,729 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 09:53:14,730 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 09:53:14,731 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 09:53:14,732 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 09:53:14,732 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound20.c [2021-05-06 09:53:14,774 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c53f8acc4/3a6d34c9ad7d489fa61246d63a575b98/FLAG4f5f9dd78 [2021-05-06 09:53:15,200 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 09:53:15,201 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound20.c [2021-05-06 09:53:15,205 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c53f8acc4/3a6d34c9ad7d489fa61246d63a575b98/FLAG4f5f9dd78 [2021-05-06 09:53:15,565 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c53f8acc4/3a6d34c9ad7d489fa61246d63a575b98 [2021-05-06 09:53:15,567 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 09:53:15,569 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 09:53:15,572 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 09:53:15,572 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 09:53:15,575 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 09:53:15,575 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 09:53:15" (1/1) ... [2021-05-06 09:53:15,576 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ee3ae80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:53:15, skipping insertion in model container [2021-05-06 09:53:15,576 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 09:53:15" (1/1) ... [2021-05-06 09:53:15,580 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 09:53:15,591 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 09:53:15,687 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound20.c[524,537] [2021-05-06 09:53:15,703 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 09:53:15,725 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 09:53:15,772 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound20.c[524,537] [2021-05-06 09:53:15,795 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 09:53:15,804 INFO L208 MainTranslator]: Completed translation [2021-05-06 09:53:15,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:53:15 WrapperNode [2021-05-06 09:53:15,804 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 09:53:15,805 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 09:53:15,805 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 09:53:15,805 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 09:53:15,822 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:53:15" (1/1) ... [2021-05-06 09:53:15,822 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:53:15" (1/1) ... [2021-05-06 09:53:15,826 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:53:15" (1/1) ... [2021-05-06 09:53:15,827 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:53:15" (1/1) ... [2021-05-06 09:53:15,830 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:53:15" (1/1) ... [2021-05-06 09:53:15,832 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:53:15" (1/1) ... [2021-05-06 09:53:15,833 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:53:15" (1/1) ... [2021-05-06 09:53:15,834 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 09:53:15,835 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 09:53:15,835 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 09:53:15,835 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 09:53:15,836 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:53:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 09:53:15,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 09:53:15,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 09:53:15,977 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 09:53:15,978 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 09:53:15,978 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 09:53:15,978 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 09:53:15,978 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 09:53:15,978 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 09:53:15,978 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 09:53:15,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 09:53:15,979 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 09:53:15,979 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 09:53:15,979 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 09:53:15,979 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 09:53:15,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 09:53:15,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 09:53:15,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 09:53:15,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 09:53:15,980 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 09:53:15,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 09:53:16,171 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 09:53:16,172 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 09:53:16,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:53:16 BoogieIcfgContainer [2021-05-06 09:53:16,173 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 09:53:16,174 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 09:53:16,174 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 09:53:16,174 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 09:53:16,176 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:53:16" (1/1) ... [2021-05-06 09:53:16,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 09:53:16 BasicIcfg [2021-05-06 09:53:16,198 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 09:53:16,199 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 09:53:16,199 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 09:53:16,201 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 09:53:16,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 09:53:15" (1/4) ... [2021-05-06 09:53:16,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29350f66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 09:53:16, skipping insertion in model container [2021-05-06 09:53:16,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:53:15" (2/4) ... [2021-05-06 09:53:16,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29350f66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 09:53:16, skipping insertion in model container [2021-05-06 09:53:16,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:53:16" (3/4) ... [2021-05-06 09:53:16,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29350f66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 09:53:16, skipping insertion in model container [2021-05-06 09:53:16,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 09:53:16" (4/4) ... [2021-05-06 09:53:16,203 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound20.cJordan [2021-05-06 09:53:16,206 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 09:53:16,209 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 09:53:16,218 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 09:53:16,230 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 09:53:16,230 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 09:53:16,230 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 09:53:16,230 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 09:53:16,230 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 09:53:16,230 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 09:53:16,231 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 09:53:16,231 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 09:53:16,238 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 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 09:53:16,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 09:53:16,243 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:53:16,243 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:53:16,243 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:53:16,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:53:16,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1119019339, now seen corresponding path program 1 times [2021-05-06 09:53:16,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:53:16,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578161438] [2021-05-06 09:53:16,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:53:16,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:53:16,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:53:16,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:53:16,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 09:53:16,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:53:16,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:53:16,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:53:16,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578161438] [2021-05-06 09:53:16,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578161438] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:53:16,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:53:16,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 09:53:16,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579888977] [2021-05-06 09:53:16,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 09:53:16,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:53:16,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 09:53:16,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 09:53:16,413 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 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 09:53:16,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:53:16,475 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2021-05-06 09:53:16,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 09:53:16,476 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 09:53:16,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:53:16,481 INFO L225 Difference]: With dead ends: 33 [2021-05-06 09:53:16,481 INFO L226 Difference]: Without dead ends: 28 [2021-05-06 09:53:16,482 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 09:53:16,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-06 09:53:16,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-05-06 09:53:16,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 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 09:53:16,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-05-06 09:53:16,505 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 17 [2021-05-06 09:53:16,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:53:16,506 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-05-06 09:53:16,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 09:53:16,506 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-05-06 09:53:16,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 09:53:16,507 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:53:16,507 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:53:16,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 09:53:16,507 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:53:16,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:53:16,508 INFO L82 PathProgramCache]: Analyzing trace with hash -496973861, now seen corresponding path program 1 times [2021-05-06 09:53:16,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:53:16,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993455960] [2021-05-06 09:53:16,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:53:16,543 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:53:16,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1588019512] [2021-05-06 09:53:16,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:53:16,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:53:16,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 09:53:16,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:53:16,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:16,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:16,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:16,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:16,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:16,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:53:16,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:53:16,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993455960] [2021-05-06 09:53:16,777 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:53:16,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588019512] [2021-05-06 09:53:16,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588019512] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:53:16,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:53:16,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 09:53:16,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211769099] [2021-05-06 09:53:16,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 09:53:16,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:53:16,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 09:53:16,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 09:53:16,781 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 09:53:16,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:53:16,792 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2021-05-06 09:53:16,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 09:53:16,792 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-06 09:53:16,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:53:16,793 INFO L225 Difference]: With dead ends: 29 [2021-05-06 09:53:16,793 INFO L226 Difference]: Without dead ends: 29 [2021-05-06 09:53:16,795 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 09:53:16,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-06 09:53:16,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-06 09:53:16,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 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 09:53:16,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-05-06 09:53:16,807 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 18 [2021-05-06 09:53:16,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:53:16,808 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-05-06 09:53:16,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 09:53:16,809 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-05-06 09:53:16,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 09:53:16,812 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:53:16,812 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:53:17,025 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 09:53:17,026 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:53:17,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:53:17,027 INFO L82 PathProgramCache]: Analyzing trace with hash -495871594, now seen corresponding path program 1 times [2021-05-06 09:53:17,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:53:17,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751982168] [2021-05-06 09:53:17,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:53:17,037 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:53:17,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [592772504] [2021-05-06 09:53:17,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:53:17,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:53:17,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 09:53:17,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:53:17,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:17,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:53:17,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:53:17,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751982168] [2021-05-06 09:53:17,197 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:53:17,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592772504] [2021-05-06 09:53:17,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592772504] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:53:17,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:53:17,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 09:53:17,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671650374] [2021-05-06 09:53:17,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 09:53:17,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:53:17,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 09:53:17,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 09:53:17,199 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 09:53:17,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:53:17,248 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2021-05-06 09:53:17,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 09:53:17,248 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 18 [2021-05-06 09:53:17,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:53:17,249 INFO L225 Difference]: With dead ends: 40 [2021-05-06 09:53:17,249 INFO L226 Difference]: Without dead ends: 40 [2021-05-06 09:53:17,249 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:53:17,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-06 09:53:17,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2021-05-06 09:53:17,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 states have internal predecessors, (28), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 09:53:17,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2021-05-06 09:53:17,254 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 18 [2021-05-06 09:53:17,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:53:17,254 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2021-05-06 09:53:17,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 09:53:17,254 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2021-05-06 09:53:17,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 09:53:17,255 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:53:17,255 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, 1, 1] [2021-05-06 09:53:17,474 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:53:17,474 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:53:17,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:53:17,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1025358414, now seen corresponding path program 1 times [2021-05-06 09:53:17,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:53:17,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287728454] [2021-05-06 09:53:17,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:53:17,488 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:53:17,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1091343227] [2021-05-06 09:53:17,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:53:17,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:53:17,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 09:53:17,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:53:17,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:17,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:17,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:17,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:17,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:17,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:17,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:17,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:17,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:17,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:17,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:17,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:17,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:17,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:17,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:53:17,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:53:17,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287728454] [2021-05-06 09:53:17,763 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:53:17,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091343227] [2021-05-06 09:53:17,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091343227] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:53:17,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:53:17,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 09:53:17,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594741458] [2021-05-06 09:53:17,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 09:53:17,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:53:17,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 09:53:17,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-06 09:53:17,764 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:53:17,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:53:17,999 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2021-05-06 09:53:17,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 09:53:17,999 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-05-06 09:53:17,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:53:18,001 INFO L225 Difference]: With dead ends: 49 [2021-05-06 09:53:18,001 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 09:53:18,001 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 190.8ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-05-06 09:53:18,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 09:53:18,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-05-06 09:53:18,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 29 states have internal predecessors, (36), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 09:53:18,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2021-05-06 09:53:18,005 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 24 [2021-05-06 09:53:18,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:53:18,005 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2021-05-06 09:53:18,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:53:18,005 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2021-05-06 09:53:18,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 09:53:18,005 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:53:18,006 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-06 09:53:18,222 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:53:18,225 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:53:18,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:53:18,225 INFO L82 PathProgramCache]: Analyzing trace with hash -2117889998, now seen corresponding path program 1 times [2021-05-06 09:53:18,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:53:18,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192169837] [2021-05-06 09:53:18,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:53:18,234 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:53:18,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1395363257] [2021-05-06 09:53:18,235 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 09:53:18,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:53:18,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 09:53:18,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:53:18,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:18,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:18,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:18,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:18,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:18,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:18,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:18,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:18,327 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 09:53:18,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:53:18,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192169837] [2021-05-06 09:53:18,328 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:53:18,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395363257] [2021-05-06 09:53:18,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395363257] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:53:18,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:53:18,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 09:53:18,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015030329] [2021-05-06 09:53:18,328 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 09:53:18,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:53:18,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 09:53:18,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 09:53:18,329 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 09:53:18,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:53:18,360 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2021-05-06 09:53:18,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 09:53:18,360 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2021-05-06 09:53:18,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:53:18,361 INFO L225 Difference]: With dead ends: 48 [2021-05-06 09:53:18,361 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 09:53:18,361 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.2ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:53:18,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 09:53:18,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-05-06 09:53:18,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 36 states have internal predecessors, (47), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 09:53:18,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2021-05-06 09:53:18,364 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 27 [2021-05-06 09:53:18,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:53:18,364 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2021-05-06 09:53:18,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 09:53:18,365 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2021-05-06 09:53:18,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 09:53:18,365 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:53:18,365 INFO L523 BasicCegarLoop]: trace histogram [2, 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 09:53:18,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:53:18,584 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:53:18,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:53:18,585 INFO L82 PathProgramCache]: Analyzing trace with hash -2116787731, now seen corresponding path program 1 times [2021-05-06 09:53:18,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:53:18,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622866096] [2021-05-06 09:53:18,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:53:18,595 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:53:18,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [177667143] [2021-05-06 09:53:18,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:53:18,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:53:18,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 09:53:18,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:53:18,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:18,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:18,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:18,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:18,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:18,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:18,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:18,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:18,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:18,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:18,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:18,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:18,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:18,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:18,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:18,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:18,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:18,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:18,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:18,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:18,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:18,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:18,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:18,872 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:53:18,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:53:18,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622866096] [2021-05-06 09:53:18,873 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:53:18,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177667143] [2021-05-06 09:53:18,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177667143] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:53:18,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:53:18,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 09:53:18,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486808132] [2021-05-06 09:53:18,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 09:53:18,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:53:18,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 09:53:18,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 09:53:18,874 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:53:18,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:53:18,973 INFO L93 Difference]: Finished difference Result 61 states and 79 transitions. [2021-05-06 09:53:18,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 09:53:18,973 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2021-05-06 09:53:18,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:53:18,974 INFO L225 Difference]: With dead ends: 61 [2021-05-06 09:53:18,974 INFO L226 Difference]: Without dead ends: 61 [2021-05-06 09:53:18,974 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 54.3ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 09:53:18,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-06 09:53:18,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2021-05-06 09:53:18,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 40 states have (on average 1.3) internal successors, (52), 42 states have internal predecessors, (52), 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 09:53:18,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2021-05-06 09:53:18,978 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 27 [2021-05-06 09:53:18,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:53:18,978 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2021-05-06 09:53:18,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:53:18,978 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2021-05-06 09:53:18,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 09:53:18,978 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:53:18,979 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:53:19,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:53:19,196 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:53:19,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:53:19,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1857795251, now seen corresponding path program 1 times [2021-05-06 09:53:19,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:53:19,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978564232] [2021-05-06 09:53:19,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:53:19,204 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:53:19,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [720923734] [2021-05-06 09:53:19,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:53:19,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:53:19,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-06 09:53:19,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:53:19,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:19,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:19,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:19,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:19,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:19,365 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:53:19,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:53:19,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978564232] [2021-05-06 09:53:19,366 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:53:19,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720923734] [2021-05-06 09:53:19,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720923734] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:53:19,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:53:19,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 09:53:19,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132070855] [2021-05-06 09:53:19,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 09:53:19,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:53:19,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 09:53:19,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-06 09:53:19,367 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:53:19,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:53:19,549 INFO L93 Difference]: Finished difference Result 64 states and 79 transitions. [2021-05-06 09:53:19,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 09:53:19,550 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-05-06 09:53:19,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:53:19,550 INFO L225 Difference]: With dead ends: 64 [2021-05-06 09:53:19,550 INFO L226 Difference]: Without dead ends: 64 [2021-05-06 09:53:19,551 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 71.4ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-06 09:53:19,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-06 09:53:19,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-06 09:53:19,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 47 states have (on average 1.297872340425532) internal successors, (61), 49 states have internal predecessors, (61), 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 09:53:19,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 79 transitions. [2021-05-06 09:53:19,554 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 79 transitions. Word has length 28 [2021-05-06 09:53:19,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:53:19,554 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 79 transitions. [2021-05-06 09:53:19,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:53:19,554 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 79 transitions. [2021-05-06 09:53:19,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 09:53:19,555 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:53:19,555 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:53:19,755 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:53:19,756 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:53:19,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:53:19,756 INFO L82 PathProgramCache]: Analyzing trace with hash -2004143825, now seen corresponding path program 1 times [2021-05-06 09:53:19,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:53:19,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828915979] [2021-05-06 09:53:19,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:53:19,763 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:53:19,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1897266160] [2021-05-06 09:53:19,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 09:53:19,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:53:19,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 09:53:19,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:53:19,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:19,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:19,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:19,887 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:53:19,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:53:19,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828915979] [2021-05-06 09:53:19,887 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:53:19,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897266160] [2021-05-06 09:53:19,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897266160] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:53:19,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:53:19,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 09:53:19,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953071134] [2021-05-06 09:53:19,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 09:53:19,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:53:19,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 09:53:19,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:53:19,888 INFO L87 Difference]: Start difference. First operand 64 states and 79 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:53:20,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:53:20,196 INFO L93 Difference]: Finished difference Result 77 states and 96 transitions. [2021-05-06 09:53:20,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 09:53:20,197 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-06 09:53:20,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:53:20,197 INFO L225 Difference]: With dead ends: 77 [2021-05-06 09:53:20,197 INFO L226 Difference]: Without dead ends: 77 [2021-05-06 09:53:20,198 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 41.0ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:53:20,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-06 09:53:20,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2021-05-06 09:53:20,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 55 states have (on average 1.290909090909091) internal successors, (71), 57 states have internal predecessors, (71), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 09:53:20,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2021-05-06 09:53:20,202 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 29 [2021-05-06 09:53:20,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:53:20,202 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2021-05-06 09:53:20,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:53:20,202 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2021-05-06 09:53:20,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 09:53:20,202 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:53:20,203 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:53:20,403 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:53:20,403 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:53:20,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:53:20,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1116640144, now seen corresponding path program 1 times [2021-05-06 09:53:20,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:53:20,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89271053] [2021-05-06 09:53:20,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:53:20,410 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:53:20,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [499782255] [2021-05-06 09:53:20,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 09:53:20,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:53:20,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-06 09:53:20,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:53:20,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:20,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:20,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:20,596 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:53:20,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:53:20,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89271053] [2021-05-06 09:53:20,597 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:53:20,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499782255] [2021-05-06 09:53:20,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499782255] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:53:20,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:53:20,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 09:53:20,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87958287] [2021-05-06 09:53:20,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 09:53:20,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:53:20,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 09:53:20,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 09:53:20,598 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:53:20,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:53:20,936 INFO L93 Difference]: Finished difference Result 85 states and 107 transitions. [2021-05-06 09:53:20,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 09:53:20,937 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-06 09:53:20,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:53:20,937 INFO L225 Difference]: With dead ends: 85 [2021-05-06 09:53:20,937 INFO L226 Difference]: Without dead ends: 85 [2021-05-06 09:53:20,938 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 56.2ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-06 09:53:20,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-06 09:53:20,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 72. [2021-05-06 09:53:20,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 55 states have internal predecessors, (69), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 09:53:20,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 89 transitions. [2021-05-06 09:53:20,942 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 89 transitions. Word has length 29 [2021-05-06 09:53:20,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:53:20,943 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 89 transitions. [2021-05-06 09:53:20,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:53:20,943 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 89 transitions. [2021-05-06 09:53:20,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 09:53:20,943 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:53:20,943 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:53:21,162 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 09:53:21,163 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:53:21,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:53:21,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1454559031, now seen corresponding path program 1 times [2021-05-06 09:53:21,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:53:21,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364505417] [2021-05-06 09:53:21,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:53:21,169 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:53:21,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [21716567] [2021-05-06 09:53:21,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-06 09:53:21,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:53:21,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 09:53:21,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:53:21,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:21,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:21,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:21,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:21,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:21,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:21,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:21,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:21,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:21,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:21,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:21,293 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 09:53:21,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:53:21,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364505417] [2021-05-06 09:53:21,294 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:53:21,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21716567] [2021-05-06 09:53:21,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21716567] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:53:21,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:53:21,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-06 09:53:21,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828392762] [2021-05-06 09:53:21,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 09:53:21,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:53:21,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 09:53:21,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 09:53:21,295 INFO L87 Difference]: Start difference. First operand 72 states and 89 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 09:53:21,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:53:21,361 INFO L93 Difference]: Finished difference Result 90 states and 118 transitions. [2021-05-06 09:53:21,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:53:21,361 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 33 [2021-05-06 09:53:21,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:53:21,362 INFO L225 Difference]: With dead ends: 90 [2021-05-06 09:53:21,362 INFO L226 Difference]: Without dead ends: 90 [2021-05-06 09:53:21,362 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 37.0ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:53:21,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-06 09:53:21,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 85. [2021-05-06 09:53:21,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 63 states have (on average 1.3333333333333333) internal successors, (84), 66 states have internal predecessors, (84), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 09:53:21,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 110 transitions. [2021-05-06 09:53:21,368 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 110 transitions. Word has length 33 [2021-05-06 09:53:21,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:53:21,369 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 110 transitions. [2021-05-06 09:53:21,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 09:53:21,369 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 110 transitions. [2021-05-06 09:53:21,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-06 09:53:21,370 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:53:21,370 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:53:21,595 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:53:21,595 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:53:21,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:53:21,595 INFO L82 PathProgramCache]: Analyzing trace with hash 482870923, now seen corresponding path program 1 times [2021-05-06 09:53:21,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:53:21,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770501987] [2021-05-06 09:53:21,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:53:21,602 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:53:21,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1555919359] [2021-05-06 09:53:21,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:53:21,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:53:21,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 09:53:21,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:53:21,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:21,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:21,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:21,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:21,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:53:21,817 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 09:53:21,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:53:21,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770501987] [2021-05-06 09:53:21,818 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:53:21,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555919359] [2021-05-06 09:53:21,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555919359] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:53:21,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:53:21,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 09:53:21,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462811673] [2021-05-06 09:53:21,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 09:53:21,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:53:21,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 09:53:21,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 09:53:21,819 INFO L87 Difference]: Start difference. First operand 85 states and 110 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4)