/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_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 21:00:31,324 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 21:00:31,326 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 21:00:31,360 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 21:00:31,360 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 21:00:31,361 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 21:00:31,363 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 21:00:31,364 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 21:00:31,366 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 21:00:31,366 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 21:00:31,367 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 21:00:31,368 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2021-05-02 21:00:31,392 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 21:00:31,393 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 21:00:31,393 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 21:00:31,394 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 21:00:31,403 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 21:00:31,404 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 21:00:31,405 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 21:00:31,405 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 21:00:31,405 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 21:00:31,405 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 21:00:31,405 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 21:00:31,406 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 21:00:31,406 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 21:00:31,406 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 21:00:31,406 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 21:00:31,406 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 21:00:31,406 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 21:00:31,406 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 21:00:31,407 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 21:00:31,407 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 21:00:31,407 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 21:00:31,407 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 21:00:31,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 21:00:31,407 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 21:00:31,408 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 21:00:31,408 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 21:00:31,409 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 21:00:31,746 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 21:00:31,772 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 21:00:31,775 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 21:00:31,776 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 21:00:31,777 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 21:00:31,778 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound5.c [2021-05-02 21:00:31,847 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/388279772/13533e55bfca4edebdffd58dd1f5eee9/FLAG7c72b528b [2021-05-02 21:00:32,318 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 21:00:32,318 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound5.c [2021-05-02 21:00:32,324 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/388279772/13533e55bfca4edebdffd58dd1f5eee9/FLAG7c72b528b [2021-05-02 21:00:32,339 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/388279772/13533e55bfca4edebdffd58dd1f5eee9 [2021-05-02 21:00:32,342 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 21:00:32,344 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 21:00:32,349 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 21:00:32,349 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 21:00:32,353 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 21:00:32,353 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 09:00:32" (1/1) ... [2021-05-02 21:00:32,354 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b3697ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:00:32, skipping insertion in model container [2021-05-02 21:00:32,355 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 09:00:32" (1/1) ... [2021-05-02 21:00:32,361 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 21:00:32,382 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 21:00:32,473 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_valuebound5.c[545,558] [2021-05-02 21:00:32,487 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 21:00:32,494 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 21:00:32,525 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_valuebound5.c[545,558] [2021-05-02 21:00:32,531 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 21:00:32,563 INFO L208 MainTranslator]: Completed translation [2021-05-02 21:00:32,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:00:32 WrapperNode [2021-05-02 21:00:32,564 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 21:00:32,565 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 21:00:32,565 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 21:00:32,565 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 21:00:32,582 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:00:32" (1/1) ... [2021-05-02 21:00:32,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:00:32" (1/1) ... [2021-05-02 21:00:32,600 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:00:32" (1/1) ... [2021-05-02 21:00:32,601 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:00:32" (1/1) ... [2021-05-02 21:00:32,605 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:00:32" (1/1) ... [2021-05-02 21:00:32,609 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:00:32" (1/1) ... [2021-05-02 21:00:32,610 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:00:32" (1/1) ... [2021-05-02 21:00:32,611 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 21:00:32,612 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 21:00:32,612 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 21:00:32,613 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 21:00:32,613 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:00:32" (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 21:00:32,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 21:00:32,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 21:00:32,667 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 21:00:32,667 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 21:00:32,667 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 21:00:32,667 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 21:00:32,667 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 21:00:32,668 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 21:00:32,668 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 21:00:32,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 21:00:32,669 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 21:00:32,669 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 21:00:32,669 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 21:00:32,669 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 21:00:32,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 21:00:32,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 21:00:32,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 21:00:32,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 21:00:32,671 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 21:00:32,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 21:00:32,917 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 21:00:32,917 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 21:00:32,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:00:32 BoogieIcfgContainer [2021-05-02 21:00:32,919 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 21:00:32,919 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 21:00:32,919 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 21:00:32,920 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 21:00:32,939 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:00:32" (1/1) ... [2021-05-02 21:00:32,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 09:00:32 BasicIcfg [2021-05-02 21:00:32,973 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 21:00:32,974 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 21:00:32,974 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 21:00:32,977 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 21:00:32,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 09:00:32" (1/4) ... [2021-05-02 21:00:32,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11e07e23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 09:00:32, skipping insertion in model container [2021-05-02 21:00:32,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:00:32" (2/4) ... [2021-05-02 21:00:32,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11e07e23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 09:00:32, skipping insertion in model container [2021-05-02 21:00:32,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:00:32" (3/4) ... [2021-05-02 21:00:32,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11e07e23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 09:00:32, skipping insertion in model container [2021-05-02 21:00:32,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 09:00:32" (4/4) ... [2021-05-02 21:00:32,980 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound5.cJordan [2021-05-02 21:00:32,984 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 21:00:32,987 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 21:00:33,002 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 21:00:33,018 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 21:00:33,018 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 21:00:33,018 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 21:00:33,019 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 21:00:33,019 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 21:00:33,019 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 21:00:33,019 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 21:00:33,019 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 21:00:33,030 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 21:00:33,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 21:00:33,036 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:00:33,037 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 21:00:33,037 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:00:33,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:00:33,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1011787902, now seen corresponding path program 1 times [2021-05-02 21:00:33,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:00:33,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041326145] [2021-05-02 21:00:33,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:00:33,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:00:33,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 21:00:33,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:00:33,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 21:00:33,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:00:33,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 21:00:33,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:00:33,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 21:00:33,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:00:33,400 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 21:00:33,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:00:33,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041326145] [2021-05-02 21:00:33,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041326145] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 21:00:33,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 21:00:33,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 21:00:33,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58183080] [2021-05-02 21:00:33,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 21:00:33,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:00:33,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 21:00:33,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 21:00:33,420 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 21:00:33,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:00:33,565 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-02 21:00:33,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 21:00:33,567 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 21:00:33,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:00:33,574 INFO L225 Difference]: With dead ends: 38 [2021-05-02 21:00:33,574 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 21:00:33,577 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 21:00:33,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 21:00:33,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-02 21:00:33,609 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 21:00:33,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-05-02 21:00:33,612 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2021-05-02 21:00:33,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:00:33,613 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-05-02 21:00:33,613 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 21:00:33,614 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-05-02 21:00:33,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 21:00:33,615 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:00:33,616 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 21:00:33,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 21:00:33,616 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:00:33,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:00:33,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1710049411, now seen corresponding path program 1 times [2021-05-02 21:00:33,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:00:33,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141839751] [2021-05-02 21:00:33,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:00:33,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:00:33,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 21:00:33,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:00:33,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 21:00:33,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:00:33,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 21:00:33,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:00:33,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 21:00:33,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:00:33,820 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 21:00:33,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:00:33,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141839751] [2021-05-02 21:00:33,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141839751] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 21:00:33,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 21:00:33,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 21:00:33,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491575590] [2021-05-02 21:00:33,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 21:00:33,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:00:33,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 21:00:33,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 21:00:33,823 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 21:00:34,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:00:34,129 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2021-05-02 21:00:34,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 21:00:34,130 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 21:00:34,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:00:34,131 INFO L225 Difference]: With dead ends: 44 [2021-05-02 21:00:34,131 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 21:00:34,132 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 143.0ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 21:00:34,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 21:00:34,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-02 21:00:34,138 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 21:00:34,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-02 21:00:34,140 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2021-05-02 21:00:34,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:00:34,140 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-02 21:00:34,140 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 21:00:34,140 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-02 21:00:34,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 21:00:34,141 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:00:34,141 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 21:00:34,142 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 21:00:34,142 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:00:34,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:00:34,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1042498848, now seen corresponding path program 1 times [2021-05-02 21:00:34,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:00:34,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747216682] [2021-05-02 21:00:34,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:00:34,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:00:34,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 21:00:34,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:00:34,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 21:00:34,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:00:34,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 21:00:34,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:00:34,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 21:00:34,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:00:34,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-02 21:00:34,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:00:34,384 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 21:00:34,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:00:34,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747216682] [2021-05-02 21:00:34,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747216682] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 21:00:34,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 21:00:34,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 21:00:34,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822312202] [2021-05-02 21:00:34,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 21:00:34,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:00:34,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 21:00:34,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 21:00:34,387 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 21:00:34,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:00:34,795 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2021-05-02 21:00:34,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 21:00:34,796 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 21:00:34,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:00:34,797 INFO L225 Difference]: With dead ends: 48 [2021-05-02 21:00:34,797 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 21:00:34,797 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 229.0ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 21:00:34,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 21:00:34,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-05-02 21:00:34,802 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 21:00:34,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-05-02 21:00:34,803 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2021-05-02 21:00:34,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:00:34,803 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-05-02 21:00:34,803 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 21:00:34,803 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-05-02 21:00:34,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 21:00:34,804 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:00:34,805 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 21:00:34,805 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 21:00:34,805 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:00:34,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:00:34,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1436069466, now seen corresponding path program 1 times [2021-05-02 21:00:34,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:00:34,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218766575] [2021-05-02 21:00:34,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:00:34,821 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:00:34,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1449587845] [2021-05-02 21:00:34,822 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 21:00:34,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:00:34,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 21:00:34,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:00:34,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:35,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:35,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:35,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:35,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:35,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:35,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:35,150 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 21:00:35,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:00:35,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218766575] [2021-05-02 21:00:35,151 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:00:35,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449587845] [2021-05-02 21:00:35,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449587845] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:00:35,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:00:35,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 21:00:35,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969351831] [2021-05-02 21:00:35,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 21:00:35,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:00:35,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 21:00:35,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 21:00:35,153 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 21:00:35,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:00:35,331 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2021-05-02 21:00:35,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 21:00:35,331 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 21:00:35,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:00:35,332 INFO L225 Difference]: With dead ends: 56 [2021-05-02 21:00:35,333 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 21:00:35,333 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 54.7ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 21:00:35,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 21:00:35,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-02 21:00:35,338 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 21:00:35,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2021-05-02 21:00:35,339 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 38 [2021-05-02 21:00:35,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:00:35,339 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2021-05-02 21:00:35,340 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 21:00:35,340 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2021-05-02 21:00:35,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 21:00:35,341 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:00:35,341 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 21:00:35,551 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:00:35,551 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:00:35,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:00:35,552 INFO L82 PathProgramCache]: Analyzing trace with hash 5711864, now seen corresponding path program 1 times [2021-05-02 21:00:35,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:00:35,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693266631] [2021-05-02 21:00:35,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:00:35,561 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:00:35,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [800779046] [2021-05-02 21:00:35,562 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 21:00:35,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:00:35,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 21:00:35,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:00:35,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:35,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:35,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:35,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:35,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:35,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:35,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:35,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:35,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:35,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:35,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:35,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:35,840 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 21:00:35,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:00:35,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693266631] [2021-05-02 21:00:35,840 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:00:35,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800779046] [2021-05-02 21:00:35,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800779046] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:00:35,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:00:35,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 21:00:35,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113116940] [2021-05-02 21:00:35,841 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 21:00:35,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:00:35,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 21:00:35,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 21:00:35,842 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 21:00:35,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:00:35,970 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2021-05-02 21:00:35,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 21:00:35,971 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 21:00:35,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:00:35,972 INFO L225 Difference]: With dead ends: 66 [2021-05-02 21:00:35,972 INFO L226 Difference]: Without dead ends: 61 [2021-05-02 21:00:35,972 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 56.4ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 21:00:35,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-02 21:00:35,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2021-05-02 21:00:35,977 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 21:00:35,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2021-05-02 21:00:35,978 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 45 [2021-05-02 21:00:35,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:00:35,978 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2021-05-02 21:00:35,979 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 21:00:35,979 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2021-05-02 21:00:35,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 21:00:35,980 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:00:35,980 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 21:00:36,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:00:36,181 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:00:36,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:00:36,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1597443315, now seen corresponding path program 1 times [2021-05-02 21:00:36,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:00:36,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145922275] [2021-05-02 21:00:36,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:00:36,195 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:00:36,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [788982463] [2021-05-02 21:00:36,195 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 21:00:36,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:00:36,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 21:00:36,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:00:36,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:36,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:36,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:36,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:36,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:36,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:36,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:36,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:36,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:36,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:36,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:36,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:36,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:36,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:36,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:36,654 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 21:00:36,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:00:36,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145922275] [2021-05-02 21:00:36,655 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:00:36,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788982463] [2021-05-02 21:00:36,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788982463] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:00:36,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:00:36,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 21:00:36,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946453401] [2021-05-02 21:00:36,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 21:00:36,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:00:36,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 21:00:36,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-02 21:00:36,657 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 21:00:37,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:00:37,075 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2021-05-02 21:00:37,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 21:00:37,076 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 55 [2021-05-02 21:00:37,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:00:37,081 INFO L225 Difference]: With dead ends: 73 [2021-05-02 21:00:37,081 INFO L226 Difference]: Without dead ends: 73 [2021-05-02 21:00:37,082 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 129.5ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 21:00:37,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-02 21:00:37,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-05-02 21:00:37,089 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 21:00:37,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 92 transitions. [2021-05-02 21:00:37,091 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 92 transitions. Word has length 55 [2021-05-02 21:00:37,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:00:37,091 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 92 transitions. [2021-05-02 21:00:37,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 21:00:37,091 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 92 transitions. [2021-05-02 21:00:37,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 21:00:37,092 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:00:37,093 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 21:00:37,301 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:00:37,301 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:00:37,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:00:37,304 INFO L82 PathProgramCache]: Analyzing trace with hash 294687610, now seen corresponding path program 2 times [2021-05-02 21:00:37,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:00:37,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779256884] [2021-05-02 21:00:37,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:00:37,320 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:00:37,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [262676030] [2021-05-02 21:00:37,320 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 21:00:37,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 21:00:37,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 21:00:37,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-02 21:00:37,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:00:37,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:37,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:37,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:37,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:37,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:37,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:37,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:37,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:37,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:37,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:37,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:37,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:37,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:37,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:37,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:37,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:37,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:37,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:37,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:37,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:37,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:37,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:37,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:38,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:38,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:39,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:39,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:40,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:40,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:41,313 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 35 proven. 36 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-05-02 21:00:41,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:00:41,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779256884] [2021-05-02 21:00:41,313 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:00:41,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262676030] [2021-05-02 21:00:41,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262676030] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:00:41,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:00:41,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 21:00:41,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892990785] [2021-05-02 21:00:41,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 21:00:41,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:00:41,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 21:00:41,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-05-02 21:00:41,317 INFO L87 Difference]: Start difference. First operand 73 states and 92 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 21:00:43,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:00:43,863 INFO L93 Difference]: Finished difference Result 86 states and 110 transitions. [2021-05-02 21:00:43,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 21:00:43,864 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 72 [2021-05-02 21:00:43,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:00:43,865 INFO L225 Difference]: With dead ends: 86 [2021-05-02 21:00:43,865 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 21:00:43,866 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 382.0ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-05-02 21:00:43,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 21:00:43,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-05-02 21:00:43,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 50 states have internal predecessors, (55), 28 states have call successors, (28), 10 states have call predecessors, (28), 9 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 21:00:43,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 109 transitions. [2021-05-02 21:00:43,873 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 109 transitions. Word has length 72 [2021-05-02 21:00:43,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:00:43,873 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 109 transitions. [2021-05-02 21:00:43,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 21:00:43,874 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 109 transitions. [2021-05-02 21:00:43,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 21:00:43,875 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:00:43,875 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] [2021-05-02 21:00:44,075 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:00:44,076 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:00:44,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:00:44,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1689231171, now seen corresponding path program 1 times [2021-05-02 21:00:44,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:00:44,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129634347] [2021-05-02 21:00:44,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:00:44,083 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:00:44,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [536072293] [2021-05-02 21:00:44,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:00:44,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:00:44,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-02 21:00:44,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:00:44,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:44,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:44,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:44,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:44,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:44,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:44,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:44,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:44,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:44,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:44,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:44,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:44,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:44,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:44,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:44,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:44,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:44,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:44,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:44,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:44,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:44,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:44,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:44,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:44,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:44,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:44,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:44,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:45,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:45,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:45,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:45,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:45,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:45,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:45,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:45,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:45,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:45,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:45,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:45,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:45,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:45,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:45,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:45,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:45,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:45,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:45,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:45,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:45,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:45,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:45,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:45,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:45,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:00:45,355 WARN L159 QuantifierPusher]: Ignoring assumption.