/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-u_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:58:15,942 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:58:15,944 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:58:15,961 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:58:15,961 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:58:15,961 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:58:15,962 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:58:15,963 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:58:15,964 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:58:15,965 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:58:15,966 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:58:15,966 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2021-05-02 20:58:15,979 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:58:15,980 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:58:15,980 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:58:15,981 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:58:15,995 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:58:15,995 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:58:15,998 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:58:15,998 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:58:15,998 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:58:15,998 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:58:15,998 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:58:15,998 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:58:15,998 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:58:15,998 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:58:15,999 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:58:15,999 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:58:15,999 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:58:15,999 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:58:15,999 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:58:16,000 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:58:16,000 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:58:16,000 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:58:16,000 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:58:16,000 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:58:16,000 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:58:16,001 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:58:16,001 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:58:16,233 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:58:16,247 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:58:16,249 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:58:16,250 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:58:16,250 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:58:16,251 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound100.c [2021-05-02 20:58:16,304 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a34256dfd/e4c4ec244dd146abaf1fffd899c1c3b7/FLAG30e3e3f2e [2021-05-02 20:58:16,646 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:58:16,647 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound100.c [2021-05-02 20:58:16,651 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a34256dfd/e4c4ec244dd146abaf1fffd899c1c3b7/FLAG30e3e3f2e [2021-05-02 20:58:16,667 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a34256dfd/e4c4ec244dd146abaf1fffd899c1c3b7 [2021-05-02 20:58:16,670 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:58:16,671 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:58:16,673 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:58:16,674 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:58:16,676 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:58:16,677 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:58:16" (1/1) ... [2021-05-02 20:58:16,677 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@561290c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:58:16, skipping insertion in model container [2021-05-02 20:58:16,677 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:58:16" (1/1) ... [2021-05-02 20:58:16,682 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:58:16,693 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:58:16,814 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-u_valuebound100.c[545,558] [2021-05-02 20:58:16,833 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:58:16,839 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:58:16,881 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-u_valuebound100.c[545,558] [2021-05-02 20:58:16,891 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:58:16,899 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:58:16,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:58:16 WrapperNode [2021-05-02 20:58:16,900 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:58:16,902 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:58:16,902 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:58:16,906 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:58:16,914 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:58:16" (1/1) ... [2021-05-02 20:58:16,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:58:16" (1/1) ... [2021-05-02 20:58:16,926 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:58:16" (1/1) ... [2021-05-02 20:58:16,926 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:58:16" (1/1) ... [2021-05-02 20:58:16,937 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:58:16" (1/1) ... [2021-05-02 20:58:16,940 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:58:16" (1/1) ... [2021-05-02 20:58:16,948 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:58:16" (1/1) ... [2021-05-02 20:58:16,950 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:58:16,950 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:58:16,950 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:58:16,951 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:58:16,951 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:58:16" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:58:16,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:58:16,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:58:16,998 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:58:16,998 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:58:16,998 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:58:16,998 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:58:16,998 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:58:16,998 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:58:16,998 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:58:16,999 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:58:16,999 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 20:58:16,999 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:58:16,999 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:58:17,000 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:58:17,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:58:17,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:58:17,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:58:17,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:58:17,001 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:58:17,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:58:17,253 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:58:17,253 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 20:58:17,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:58:17 BoogieIcfgContainer [2021-05-02 20:58:17,254 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:58:17,255 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:58:17,255 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:58:17,256 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:58:17,262 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:58:17" (1/1) ... [2021-05-02 20:58:17,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:58:17 BasicIcfg [2021-05-02 20:58:17,273 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:58:17,274 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:58:17,274 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:58:17,276 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:58:17,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:58:16" (1/4) ... [2021-05-02 20:58:17,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3827b05d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:58:17, skipping insertion in model container [2021-05-02 20:58:17,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:58:16" (2/4) ... [2021-05-02 20:58:17,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3827b05d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:58:17, skipping insertion in model container [2021-05-02 20:58:17,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:58:17" (3/4) ... [2021-05-02 20:58:17,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3827b05d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:58:17, skipping insertion in model container [2021-05-02 20:58:17,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:58:17" (4/4) ... [2021-05-02 20:58:17,278 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound100.cJordan [2021-05-02 20:58:17,281 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:58:17,284 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:58:17,294 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:58:17,305 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:58:17,305 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:58:17,305 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:58:17,305 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:58:17,305 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:58:17,306 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:58:17,306 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:58:17,306 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:58:17,315 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) [2021-05-02 20:58:17,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 20:58:17,319 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:58:17,320 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] [2021-05-02 20:58:17,320 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:58:17,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:58:17,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1011787902, now seen corresponding path program 1 times [2021-05-02 20:58:17,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:58:17,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915412811] [2021-05-02 20:58:17,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:58:17,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:58:17,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:58:17,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:58:17,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:58:17,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:58:17,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:58:17,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:58:17,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:58:17,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:58:17,518 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:58:17,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:58:17,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915412811] [2021-05-02 20:58:17,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915412811] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:58:17,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:58:17,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:58:17,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343678051] [2021-05-02 20:58:17,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:58:17,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:58:17,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:58:17,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:58:17,534 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) [2021-05-02 20:58:17,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:58:17,689 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-02 20:58:17,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:58:17,691 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 [2021-05-02 20:58:17,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:58:17,696 INFO L225 Difference]: With dead ends: 38 [2021-05-02 20:58:17,696 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 20:58:17,697 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:58:17,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 20:58:17,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-02 20:58:17,722 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) [2021-05-02 20:58:17,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-05-02 20:58:17,724 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2021-05-02 20:58:17,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:58:17,725 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-05-02 20:58:17,725 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) [2021-05-02 20:58:17,725 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-05-02 20:58:17,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 20:58:17,726 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:58:17,726 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] [2021-05-02 20:58:17,726 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:58:17,727 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:58:17,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:58:17,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1710049411, now seen corresponding path program 1 times [2021-05-02 20:58:17,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:58:17,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296159332] [2021-05-02 20:58:17,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:58:17,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:58:17,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:58:17,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:58:17,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:58:17,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:58:17,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:58:17,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:58:17,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:58:17,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:58:17,902 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:58:17,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:58:17,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296159332] [2021-05-02 20:58:17,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296159332] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:58:17,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:58:17,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 20:58:17,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623990561] [2021-05-02 20:58:17,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:58:17,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:58:17,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:58:17,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:58:17,904 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) [2021-05-02 20:58:18,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:58:18,290 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2021-05-02 20:58:18,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:58:18,291 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 [2021-05-02 20:58:18,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:58:18,292 INFO L225 Difference]: With dead ends: 44 [2021-05-02 20:58:18,292 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 20:58:18,292 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 240.7ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:58:18,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 20:58:18,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-02 20:58:18,297 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) [2021-05-02 20:58:18,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-02 20:58:18,298 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2021-05-02 20:58:18,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:58:18,298 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-02 20:58:18,298 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) [2021-05-02 20:58:18,298 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-02 20:58:18,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:58:18,299 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:58:18,299 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] [2021-05-02 20:58:18,299 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 20:58:18,299 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:58:18,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:58:18,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1042498848, now seen corresponding path program 1 times [2021-05-02 20:58:18,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:58:18,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629124078] [2021-05-02 20:58:18,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:58:18,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:58:18,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:58:18,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:58:18,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:58:18,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:58:18,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:58:18,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:58:18,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:58:18,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:58:18,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-02 20:58:18,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:58:18,518 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:58:18,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:58:18,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629124078] [2021-05-02 20:58:18,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629124078] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:58:18,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:58:18,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 20:58:18,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727298733] [2021-05-02 20:58:18,520 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:58:18,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:58:18,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:58:18,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:58:18,520 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) [2021-05-02 20:58:18,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:58:18,762 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2021-05-02 20:58:18,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:58:18,762 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 [2021-05-02 20:58:18,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:58:18,765 INFO L225 Difference]: With dead ends: 48 [2021-05-02 20:58:18,765 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 20:58:18,765 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 172.2ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:58:18,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 20:58:18,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-05-02 20:58:18,775 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) [2021-05-02 20:58:18,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-05-02 20:58:18,778 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2021-05-02 20:58:18,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:58:18,779 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-05-02 20:58:18,779 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) [2021-05-02 20:58:18,779 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-05-02 20:58:18,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 20:58:18,780 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:58:18,781 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] [2021-05-02 20:58:18,781 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 20:58:18,781 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:58:18,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:58:18,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1436069466, now seen corresponding path program 1 times [2021-05-02 20:58:18,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:58:18,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796909266] [2021-05-02 20:58:18,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:58:18,800 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:58:18,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [960487548] [2021-05-02 20:58:18,800 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 [2021-05-02 20:58:18,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:58:18,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 20:58:18,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:58:18,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:18,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:18,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:18,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:18,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:19,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:19,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:19,023 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-02 20:58:19,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:58:19,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796909266] [2021-05-02 20:58:19,023 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:58:19,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960487548] [2021-05-02 20:58:19,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960487548] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:58:19,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:58:19,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:58:19,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572308787] [2021-05-02 20:58:19,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:58:19,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:58:19,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:58:19,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:58:19,025 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 20:58:19,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:58:19,124 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2021-05-02 20:58:19,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:58:19,125 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2021-05-02 20:58:19,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:58:19,125 INFO L225 Difference]: With dead ends: 56 [2021-05-02 20:58:19,125 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 20:58:19,126 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 36.9ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:58:19,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 20:58:19,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-02 20:58:19,129 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) [2021-05-02 20:58:19,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2021-05-02 20:58:19,130 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 38 [2021-05-02 20:58:19,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:58:19,130 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2021-05-02 20:58:19,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 20:58:19,130 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2021-05-02 20:58:19,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 20:58:19,131 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:58:19,131 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] [2021-05-02 20:58:19,337 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:58:19,338 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:58:19,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:58:19,338 INFO L82 PathProgramCache]: Analyzing trace with hash 5711864, now seen corresponding path program 1 times [2021-05-02 20:58:19,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:58:19,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326722093] [2021-05-02 20:58:19,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:58:19,346 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:58:19,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1014596139] [2021-05-02 20:58:19,347 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 [2021-05-02 20:58:19,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:58:19,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 20:58:19,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:58:19,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:19,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:19,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:19,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:19,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:19,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:19,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:19,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:19,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:19,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:19,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:19,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:19,598 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-02 20:58:19,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:58:19,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326722093] [2021-05-02 20:58:19,599 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:58:19,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014596139] [2021-05-02 20:58:19,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014596139] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:58:19,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:58:19,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:58:19,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235347633] [2021-05-02 20:58:19,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:58:19,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:58:19,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:58:19,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:58:19,602 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 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) [2021-05-02 20:58:19,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:58:19,714 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2021-05-02 20:58:19,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:58:19,715 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 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 [2021-05-02 20:58:19,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:58:19,716 INFO L225 Difference]: With dead ends: 66 [2021-05-02 20:58:19,716 INFO L226 Difference]: Without dead ends: 61 [2021-05-02 20:58:19,716 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 34.8ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:58:19,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-02 20:58:19,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2021-05-02 20:58:19,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 36 states have internal predecessors, (40), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 20:58:19,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2021-05-02 20:58:19,721 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 45 [2021-05-02 20:58:19,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:58:19,721 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2021-05-02 20:58:19,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 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) [2021-05-02 20:58:19,721 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2021-05-02 20:58:19,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 20:58:19,722 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:58:19,722 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] [2021-05-02 20:58:19,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:58:19,937 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:58:19,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:58:19,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1597443315, now seen corresponding path program 1 times [2021-05-02 20:58:19,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:58:19,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644112333] [2021-05-02 20:58:19,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:58:19,951 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:58:19,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [925857372] [2021-05-02 20:58:19,952 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 [2021-05-02 20:58:20,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:58:20,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 20:58:20,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:58:20,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:20,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:20,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:20,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:20,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:20,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:20,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:20,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:20,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:20,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:20,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:20,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:20,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:20,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:20,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:20,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:20,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:20,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:20,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:20,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:20,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:20,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:20,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:20,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:20,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:20,322 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 20:58:20,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:58:20,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644112333] [2021-05-02 20:58:20,322 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:58:20,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925857372] [2021-05-02 20:58:20,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925857372] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:58:20,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:58:20,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:58:20,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708876029] [2021-05-02 20:58:20,323 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:58:20,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:58:20,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:58:20,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:58:20,324 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand has 11 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 20:58:20,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:58:20,573 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2021-05-02 20:58:20,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:58:20,573 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 55 [2021-05-02 20:58:20,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:58:20,577 INFO L225 Difference]: With dead ends: 73 [2021-05-02 20:58:20,577 INFO L226 Difference]: Without dead ends: 73 [2021-05-02 20:58:20,577 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 108.7ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:58:20,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-02 20:58:20,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-05-02 20:58:20,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 41 states have (on average 1.170731707317073) internal successors, (48), 43 states have internal predecessors, (48), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 20:58:20,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 92 transitions. [2021-05-02 20:58:20,594 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 92 transitions. Word has length 55 [2021-05-02 20:58:20,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:58:20,594 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 92 transitions. [2021-05-02 20:58:20,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 20:58:20,594 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 92 transitions. [2021-05-02 20:58:20,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 20:58:20,595 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:58:20,595 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] [2021-05-02 20:58:20,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:58:20,796 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:58:20,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:58:20,797 INFO L82 PathProgramCache]: Analyzing trace with hash 294687610, now seen corresponding path program 2 times [2021-05-02 20:58:20,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:58:20,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42951720] [2021-05-02 20:58:20,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:58:20,809 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:58:20,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [350032865] [2021-05-02 20:58:20,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:58:21,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:58:21,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:58:21,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-02 20:58:21,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:58:21,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:21,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:21,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:21,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:21,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:21,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:21,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:21,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:21,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:21,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:21,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:21,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:21,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:21,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:21,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:21,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:21,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:21,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:21,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:21,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:21,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:21,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:21,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:21,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:21,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:21,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:21,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:22,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:58:22,891 WARN L159 QuantifierPusher]: Ignoring assumption.