/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/hard-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:55:40,897 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:55:40,898 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:55:40,916 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:55:40,917 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:55:40,918 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:55:40,918 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:55:40,921 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:55:40,922 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:55:40,923 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:55:40,923 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:55:40,924 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2021-05-06 08:55:40,950 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:55:40,951 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:55:40,952 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:55:40,960 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:55:40,973 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:55:40,973 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:55:40,975 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:55:40,975 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:55:40,975 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:55:40,976 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:55:40,976 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:55:40,976 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:55:40,976 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:55:40,976 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:55:40,977 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:55:40,977 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:55:40,977 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:55:40,977 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:55:40,977 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:55:40,977 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:55:40,978 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:55:40,978 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:55:40,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:55:40,978 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:55:40,978 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:55:40,979 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:55:40,979 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:55:41,234 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:55:41,253 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:55:41,255 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:55:41,256 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:55:41,256 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:55:41,257 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound50.c [2021-05-06 08:55:41,300 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c87e30d05/1243c5267a0e43319b21ccc23e8ee1d9/FLAG72faef78f [2021-05-06 08:55:41,673 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:55:41,674 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound50.c [2021-05-06 08:55:41,678 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c87e30d05/1243c5267a0e43319b21ccc23e8ee1d9/FLAG72faef78f [2021-05-06 08:55:41,692 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c87e30d05/1243c5267a0e43319b21ccc23e8ee1d9 [2021-05-06 08:55:41,694 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:55:41,695 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:55:41,699 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:55:41,699 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:55:41,702 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:55:41,702 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:55:41" (1/1) ... [2021-05-06 08:55:41,703 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40661b15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:55:41, skipping insertion in model container [2021-05-06 08:55:41,703 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:55:41" (1/1) ... [2021-05-06 08:55:41,707 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:55:41,717 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:55:41,822 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/hard-ll_valuebound50.c[546,559] [2021-05-06 08:55:41,841 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:55:41,848 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:55:41,866 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/hard-ll_valuebound50.c[546,559] [2021-05-06 08:55:41,887 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:55:41,896 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:55:41,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:55:41 WrapperNode [2021-05-06 08:55:41,896 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:55:41,897 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:55:41,897 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:55:41,897 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:55:41,903 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:55:41" (1/1) ... [2021-05-06 08:55:41,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:55:41" (1/1) ... [2021-05-06 08:55:41,908 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:55:41" (1/1) ... [2021-05-06 08:55:41,908 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:55:41" (1/1) ... [2021-05-06 08:55:41,911 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:55:41" (1/1) ... [2021-05-06 08:55:41,913 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:55:41" (1/1) ... [2021-05-06 08:55:41,914 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:55:41" (1/1) ... [2021-05-06 08:55:41,915 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:55:41,916 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:55:41,916 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:55:41,916 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:55:41,916 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:55:41" (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 08:55:41,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:55:41,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:55:41,983 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:55:41,983 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:55:41,983 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:55:41,983 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:55:41,983 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:55:41,983 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:55:41,983 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:55:41,984 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:55:41,984 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 08:55:41,984 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:55:41,984 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:55:41,984 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:55:41,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:55:41,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:55:41,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:55:41,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:55:41,985 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:55:41,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:55:42,222 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:55:42,222 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 08:55:42,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:55:42 BoogieIcfgContainer [2021-05-06 08:55:42,223 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:55:42,224 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:55:42,224 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:55:42,224 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:55:42,226 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:55:42" (1/1) ... [2021-05-06 08:55:42,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:55:42 BasicIcfg [2021-05-06 08:55:42,235 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:55:42,236 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:55:42,236 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:55:42,242 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:55:42,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:55:41" (1/4) ... [2021-05-06 08:55:42,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bafcfd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:55:42, skipping insertion in model container [2021-05-06 08:55:42,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:55:41" (2/4) ... [2021-05-06 08:55:42,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bafcfd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:55:42, skipping insertion in model container [2021-05-06 08:55:42,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:55:42" (3/4) ... [2021-05-06 08:55:42,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bafcfd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:55:42, skipping insertion in model container [2021-05-06 08:55:42,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:55:42" (4/4) ... [2021-05-06 08:55:42,244 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound50.cJordan [2021-05-06 08:55:42,247 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:55:42,249 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:55:42,264 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:55:42,284 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:55:42,284 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:55:42,284 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:55:42,285 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:55:42,285 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:55:42,285 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:55:42,285 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:55:42,285 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:55:42,297 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 08:55:42,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 08:55:42,304 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:55:42,304 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:55:42,304 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:55:42,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:55:42,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1011787902, now seen corresponding path program 1 times [2021-05-06 08:55:42,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:55:42,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58312013] [2021-05-06 08:55:42,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:55:42,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:55:42,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:55:42,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:55:42,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:55:42,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:55:42,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 08:55:42,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:55:42,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 08:55:42,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:55:42,540 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:55:42,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:55:42,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58312013] [2021-05-06 08:55:42,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58312013] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:55:42,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:55:42,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 08:55:42,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214293782] [2021-05-06 08:55:42,545 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 08:55:42,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:55:42,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 08:55:42,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:55:42,555 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 08:55:42,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:55:42,672 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-06 08:55:42,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 08:55:42,673 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-06 08:55:42,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:55:42,677 INFO L225 Difference]: With dead ends: 38 [2021-05-06 08:55:42,677 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 08:55:42,678 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:55:42,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 08:55:42,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 08:55:42,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 08:55:42,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-05-06 08:55:42,714 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2021-05-06 08:55:42,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:55:42,714 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-05-06 08:55:42,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 08:55:42,714 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-05-06 08:55:42,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 08:55:42,715 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:55:42,715 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:55:42,715 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 08:55:42,715 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:55:42,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:55:42,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1710049411, now seen corresponding path program 1 times [2021-05-06 08:55:42,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:55:42,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323181137] [2021-05-06 08:55:42,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:55:42,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:55:42,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:55:42,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:55:42,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:55:42,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:55:42,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 08:55:42,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:55:42,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 08:55:42,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:55:42,848 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:55:42,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:55:42,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323181137] [2021-05-06 08:55:42,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323181137] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:55:42,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:55:42,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 08:55:42,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041527200] [2021-05-06 08:55:42,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:55:42,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:55:42,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:55:42,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:55:42,853 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 08:55:43,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:55:43,140 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2021-05-06 08:55:43,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:55:43,141 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2021-05-06 08:55:43,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:55:43,142 INFO L225 Difference]: With dead ends: 44 [2021-05-06 08:55:43,143 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 08:55:43,144 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 129.0ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:55:43,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 08:55:43,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-06 08:55:43,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 08:55:43,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-06 08:55:43,161 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2021-05-06 08:55:43,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:55:43,161 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-06 08:55:43,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 08:55:43,162 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-06 08:55:43,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 08:55:43,166 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:55:43,166 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 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 08:55:43,166 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 08:55:43,167 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:55:43,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:55:43,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1042498848, now seen corresponding path program 1 times [2021-05-06 08:55:43,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:55:43,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438588837] [2021-05-06 08:55:43,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:55:43,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:55:43,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:55:43,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:55:43,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:55:43,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:55:43,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 08:55:43,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:55:43,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 08:55:43,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:55:43,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-06 08:55:43,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:55:43,281 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:55:43,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:55:43,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438588837] [2021-05-06 08:55:43,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438588837] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:55:43,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:55:43,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 08:55:43,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385852321] [2021-05-06 08:55:43,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:55:43,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:55:43,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:55:43,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:55:43,282 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:55:43,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:55:43,512 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2021-05-06 08:55:43,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:55:43,512 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 08:55:43,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:55:43,513 INFO L225 Difference]: With dead ends: 48 [2021-05-06 08:55:43,513 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 08:55:43,513 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 108.8ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:55:43,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 08:55:43,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-05-06 08:55:43,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 08:55:43,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-05-06 08:55:43,523 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2021-05-06 08:55:43,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:55:43,523 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-05-06 08:55:43,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:55:43,523 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-05-06 08:55:43,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 08:55:43,524 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:55:43,524 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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 08:55:43,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 08:55:43,524 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:55:43,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:55:43,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1436069466, now seen corresponding path program 1 times [2021-05-06 08:55:43,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:55:43,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946732381] [2021-05-06 08:55:43,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:55:43,548 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:55:43,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1380115937] [2021-05-06 08:55:43,548 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 08:55:43,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:55:43,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:55:43,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:55:43,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:43,785 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 08:55:43,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:55:43,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946732381] [2021-05-06 08:55:43,785 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:55:43,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380115937] [2021-05-06 08:55:43,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380115937] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:55:43,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:55:43,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:55:43,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998765626] [2021-05-06 08:55:43,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:55:43,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:55:43,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:55:43,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:55:43,787 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 08:55:43,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:55:43,826 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2021-05-06 08:55:43,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:55:43,826 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2021-05-06 08:55:43,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:55:43,827 INFO L225 Difference]: With dead ends: 56 [2021-05-06 08:55:43,827 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 08:55:43,827 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:55:43,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 08:55:43,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-06 08:55:43,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 08:55:43,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2021-05-06 08:55:43,831 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 38 [2021-05-06 08:55:43,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:55:43,831 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2021-05-06 08:55:43,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 08:55:43,831 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2021-05-06 08:55:43,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 08:55:43,832 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:55:43,832 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:55:44,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:55:44,033 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:55:44,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:55:44,033 INFO L82 PathProgramCache]: Analyzing trace with hash 5711864, now seen corresponding path program 1 times [2021-05-06 08:55:44,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:55:44,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623863910] [2021-05-06 08:55:44,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:55:44,040 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:55:44,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [224067305] [2021-05-06 08:55:44,040 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 08:55:44,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:55:44,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:55:44,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:55:44,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:44,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:44,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:44,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:44,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:44,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:44,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:44,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:44,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:44,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:44,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:44,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:44,335 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-06 08:55:44,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:55:44,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623863910] [2021-05-06 08:55:44,335 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:55:44,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224067305] [2021-05-06 08:55:44,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224067305] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:55:44,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:55:44,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:55:44,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061951705] [2021-05-06 08:55:44,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:55:44,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:55:44,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:55:44,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:55:44,337 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:55:44,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:55:44,485 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2021-05-06 08:55:44,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:55:44,485 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2021-05-06 08:55:44,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:55:44,489 INFO L225 Difference]: With dead ends: 67 [2021-05-06 08:55:44,489 INFO L226 Difference]: Without dead ends: 58 [2021-05-06 08:55:44,490 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 60.6ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:55:44,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-06 08:55:44,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-06 08:55:44,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 08:55:44,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-05-06 08:55:44,502 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 45 [2021-05-06 08:55:44,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:55:44,503 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-05-06 08:55:44,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:55:44,503 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-05-06 08:55:44,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-06 08:55:44,507 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:55:44,507 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 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 08:55:44,714 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:55:44,715 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:55:44,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:55:44,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1597443315, now seen corresponding path program 1 times [2021-05-06 08:55:44,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:55:44,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88274914] [2021-05-06 08:55:44,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:55:44,722 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:55:44,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [449366641] [2021-05-06 08:55:44,722 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 08:55:44,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:55:44,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-06 08:55:44,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:55:44,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:44,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:44,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:44,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:44,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:44,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:44,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:44,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:44,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:44,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:44,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:44,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:44,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:44,953 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-05-06 08:55:44,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:55:44,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88274914] [2021-05-06 08:55:44,954 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:55:44,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449366641] [2021-05-06 08:55:44,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449366641] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:55:44,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:55:44,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:55:44,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430209156] [2021-05-06 08:55:44,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:55:44,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:55:44,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:55:44,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:55:44,956 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:55:45,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:55:45,102 INFO L93 Difference]: Finished difference Result 78 states and 95 transitions. [2021-05-06 08:55:45,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:55:45,105 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 55 [2021-05-06 08:55:45,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:55:45,107 INFO L225 Difference]: With dead ends: 78 [2021-05-06 08:55:45,107 INFO L226 Difference]: Without dead ends: 77 [2021-05-06 08:55:45,109 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:55:45,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-06 08:55:45,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-05-06 08:55:45,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 46 states have internal predecessors, (50), 23 states have call successors, (23), 10 states have call predecessors, (23), 9 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 08:55:45,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 93 transitions. [2021-05-06 08:55:45,121 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 93 transitions. Word has length 55 [2021-05-06 08:55:45,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:55:45,122 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 93 transitions. [2021-05-06 08:55:45,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:55:45,122 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 93 transitions. [2021-05-06 08:55:45,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-06 08:55:45,122 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:55:45,122 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:55:45,341 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:55:45,341 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:55:45,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:55:45,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1292294975, now seen corresponding path program 1 times [2021-05-06 08:55:45,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:55:45,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749427904] [2021-05-06 08:55:45,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:55:45,347 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:55:45,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [5480273] [2021-05-06 08:55:45,348 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 08:55:45,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:55:45,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 08:55:45,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:55:45,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:45,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:45,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:45,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:45,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:45,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:45,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:45,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:45,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:45,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:45,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:45,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:45,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:45,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:45,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:45,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:45,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:45,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:45,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:45,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:45,675 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-06 08:55:45,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:55:45,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749427904] [2021-05-06 08:55:45,676 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:55:45,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5480273] [2021-05-06 08:55:45,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5480273] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:55:45,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:55:45,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:55:45,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410066328] [2021-05-06 08:55:45,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:55:45,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:55:45,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:55:45,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:55:45,677 INFO L87 Difference]: Start difference. First operand 77 states and 93 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 08:55:45,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:55:45,845 INFO L93 Difference]: Finished difference Result 94 states and 109 transitions. [2021-05-06 08:55:45,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:55:45,846 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 62 [2021-05-06 08:55:45,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:55:45,848 INFO L225 Difference]: With dead ends: 94 [2021-05-06 08:55:45,848 INFO L226 Difference]: Without dead ends: 89 [2021-05-06 08:55:45,848 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 87.9ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:55:45,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-06 08:55:45,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-05-06 08:55:45,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 55 states have internal predecessors, (58), 23 states have call successors, (23), 13 states have call predecessors, (23), 12 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 08:55:45,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2021-05-06 08:55:45,861 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 62 [2021-05-06 08:55:45,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:55:45,862 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2021-05-06 08:55:45,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 08:55:45,862 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2021-05-06 08:55:45,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-06 08:55:45,866 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:55:45,866 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:55:46,085 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:55:46,085 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:55:46,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:55:46,085 INFO L82 PathProgramCache]: Analyzing trace with hash 294687610, now seen corresponding path program 2 times [2021-05-06 08:55:46,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:55:46,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240379220] [2021-05-06 08:55:46,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:55:46,091 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:55:46,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [284884129] [2021-05-06 08:55:46,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:55:46,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:55:46,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:55:46,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-06 08:55:46,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:55:46,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:46,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:46,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:46,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:46,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:46,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:46,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:46,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:46,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:46,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:46,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:46,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:46,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:46,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:46,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:46,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:46,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:46,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:46,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:46,322 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-05-06 08:55:46,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:55:46,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240379220] [2021-05-06 08:55:46,323 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:55:46,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284884129] [2021-05-06 08:55:46,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284884129] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:55:46,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:55:46,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:55:46,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848011292] [2021-05-06 08:55:46,323 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:55:46,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:55:46,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:55:46,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:55:46,324 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 08:55:46,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:55:46,506 INFO L93 Difference]: Finished difference Result 114 states and 138 transitions. [2021-05-06 08:55:46,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:55:46,506 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 72 [2021-05-06 08:55:46,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:55:46,507 INFO L225 Difference]: With dead ends: 114 [2021-05-06 08:55:46,507 INFO L226 Difference]: Without dead ends: 113 [2021-05-06 08:55:46,507 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 55.0ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:55:46,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-05-06 08:55:46,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2021-05-06 08:55:46,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 65 states have (on average 1.123076923076923) internal successors, (73), 68 states have internal predecessors, (73), 32 states have call successors, (32), 14 states have call predecessors, (32), 13 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-06 08:55:46,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 134 transitions. [2021-05-06 08:55:46,511 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 134 transitions. Word has length 72 [2021-05-06 08:55:46,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:55:46,511 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 134 transitions. [2021-05-06 08:55:46,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 08:55:46,512 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 134 transitions. [2021-05-06 08:55:46,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-06 08:55:46,512 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:55:46,512 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:55:46,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:55:46,729 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:55:46,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:55:46,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1689231171, now seen corresponding path program 1 times [2021-05-06 08:55:46,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:55:46,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798589871] [2021-05-06 08:55:46,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:55:46,735 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:55:46,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [553236014] [2021-05-06 08:55:46,735 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 08:55:46,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:55:46,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-06 08:55:46,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:55:46,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:46,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:46,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:46,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:46,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:46,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:46,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:46,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:46,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:46,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:46,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:46,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:46,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:47,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:47,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:47,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:47,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:47,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:47,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:47,135 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 42 proven. 8 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-05-06 08:55:47,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:55:47,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798589871] [2021-05-06 08:55:47,135 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:55:47,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553236014] [2021-05-06 08:55:47,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553236014] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:55:47,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:55:47,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 08:55:47,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006053096] [2021-05-06 08:55:47,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 08:55:47,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:55:47,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 08:55:47,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:55:47,136 INFO L87 Difference]: Start difference. First operand 111 states and 134 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 08:55:47,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:55:47,412 INFO L93 Difference]: Finished difference Result 121 states and 142 transitions. [2021-05-06 08:55:47,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:55:47,413 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2021-05-06 08:55:47,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:55:47,414 INFO L225 Difference]: With dead ends: 121 [2021-05-06 08:55:47,414 INFO L226 Difference]: Without dead ends: 121 [2021-05-06 08:55:47,414 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 148.1ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:55:47,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-05-06 08:55:47,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2021-05-06 08:55:47,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 71 states have (on average 1.1126760563380282) internal successors, (79), 74 states have internal predecessors, (79), 32 states have call successors, (32), 16 states have call predecessors, (32), 15 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-06 08:55:47,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 140 transitions. [2021-05-06 08:55:47,418 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 140 transitions. Word has length 75 [2021-05-06 08:55:47,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:55:47,418 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 140 transitions. [2021-05-06 08:55:47,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 08:55:47,419 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 140 transitions. [2021-05-06 08:55:47,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 08:55:47,419 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:55:47,419 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:55:47,629 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:55:47,629 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:55:47,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:55:47,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1714864424, now seen corresponding path program 2 times [2021-05-06 08:55:47,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:55:47,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19755449] [2021-05-06 08:55:47,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:55:47,635 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:55:47,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1517192696] [2021-05-06 08:55:47,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 08:55:47,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:55:47,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:55:47,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 08:55:47,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:55:47,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:47,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:47,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:47,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:47,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:47,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:47,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:47,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:47,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:47,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:47,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:47,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:47,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:47,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:47,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:47,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:47,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:47,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:47,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:47,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:47,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:47,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:47,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:47,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:47,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:47,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:47,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:47,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:48,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:48,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:48,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:48,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:48,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:48,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:48,126 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 21 proven. 18 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-05-06 08:55:48,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:55:48,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19755449] [2021-05-06 08:55:48,126 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:55:48,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517192696] [2021-05-06 08:55:48,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517192696] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:55:48,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:55:48,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:55:48,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834686702] [2021-05-06 08:55:48,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:55:48,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:55:48,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:55:48,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:55:48,129 INFO L87 Difference]: Start difference. First operand 119 states and 140 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 08:55:48,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:55:48,596 INFO L93 Difference]: Finished difference Result 141 states and 164 transitions. [2021-05-06 08:55:48,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:55:48,596 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 79 [2021-05-06 08:55:48,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:55:48,598 INFO L225 Difference]: With dead ends: 141 [2021-05-06 08:55:48,598 INFO L226 Difference]: Without dead ends: 136 [2021-05-06 08:55:48,598 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 297.2ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:55:48,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-06 08:55:48,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2021-05-06 08:55:48,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 83 states have (on average 1.0963855421686748) internal successors, (91), 86 states have internal predecessors, (91), 34 states have call successors, (34), 19 states have call predecessors, (34), 18 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 08:55:48,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 156 transitions. [2021-05-06 08:55:48,602 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 156 transitions. Word has length 79 [2021-05-06 08:55:48,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:55:48,603 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 156 transitions. [2021-05-06 08:55:48,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 08:55:48,603 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 156 transitions. [2021-05-06 08:55:48,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 08:55:48,603 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:55:48,603 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:55:48,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 08:55:48,813 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:55:48,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:55:48,813 INFO L82 PathProgramCache]: Analyzing trace with hash -102783885, now seen corresponding path program 1 times [2021-05-06 08:55:48,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:55:48,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499428570] [2021-05-06 08:55:48,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:55:48,819 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:55:48,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [354829364] [2021-05-06 08:55:48,819 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 08:55:48,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:55:48,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:55:48,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:55:49,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:55:49,024 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2021-05-06 08:55:49,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:55:49,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499428570] [2021-05-06 08:55:49,024 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:55:49,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354829364] [2021-05-06 08:55:49,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354829364] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:55:49,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:55:49,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:55:49,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243900235] [2021-05-06 08:55:49,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:55:49,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:55:49,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:55:49,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:55:49,026 INFO L87 Difference]: Start difference. First operand 136 states and 156 transitions. Second operand has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 08:55:49,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:55:49,105 INFO L93 Difference]: Finished difference Result 158 states and 188 transitions. [2021-05-06 08:55:49,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:55:49,105 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 86 [2021-05-06 08:55:49,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:55:49,106 INFO L225 Difference]: With dead ends: 158 [2021-05-06 08:55:49,106 INFO L226 Difference]: Without dead ends: 135 [2021-05-06 08:55:49,106 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 34.0ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:55:49,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-05-06 08:55:49,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2021-05-06 08:55:49,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 79 states have (on average 1.1265822784810127) internal successors, (89), 83 states have internal predecessors, (89), 36 states have call successors, (36), 17 states have call predecessors, (36), 16 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 08:55:49,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 157 transitions. [2021-05-06 08:55:49,110 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 157 transitions. Word has length 86 [2021-05-06 08:55:49,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:55:49,111 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 157 transitions. [2021-05-06 08:55:49,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 08:55:49,111 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 157 transitions. [2021-05-06 08:55:49,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 08:55:49,111 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:55:49,111 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:55:49,330 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-06 08:55:49,330 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:55:49,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:55:49,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1101138899, now seen corresponding path program 3 times [2021-05-06 08:55:49,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:55:49,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315351432] [2021-05-06 08:55:49,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:55:49,335 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:55:49,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1209338103] [2021-05-06 08:55:49,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 08:55:49,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:55:49,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:55:49,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 08:55:49,401 INFO L286 TraceCheckSpWp]: Computing forward predicates...