/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/divbin_unwindbound10.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 07:53:43,893 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 07:53:43,895 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 07:53:43,926 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 07:53:43,926 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 07:53:43,929 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 07:53:43,931 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 07:53:43,936 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 07:53:43,938 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 07:53:43,941 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 07:53:43,942 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 07:53:43,943 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2021-05-06 07:53:43,982 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 07:53:43,983 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 07:53:43,984 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 07:53:43,987 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 07:53:44,002 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 07:53:44,002 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 07:53:44,004 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 07:53:44,005 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 07:53:44,005 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 07:53:44,005 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 07:53:44,005 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 07:53:44,005 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 07:53:44,005 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 07:53:44,005 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 07:53:44,006 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 07:53:44,006 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 07:53:44,006 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 07:53:44,006 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 07:53:44,007 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 07:53:44,007 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 07:53:44,007 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 07:53:44,007 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 07:53:44,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 07:53:44,007 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 07:53:44,007 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 07:53:44,008 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 07:53:44,009 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 07:53:44,278 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 07:53:44,294 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 07:53:44,296 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 07:53:44,297 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 07:53:44,297 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 07:53:44,298 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound10.i [2021-05-06 07:53:44,344 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9dc7d912f/daed80ad627644d78f435ffb52be57c2/FLAGccf7228a7 [2021-05-06 07:53:44,741 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 07:53:44,741 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound10.i [2021-05-06 07:53:44,746 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9dc7d912f/daed80ad627644d78f435ffb52be57c2/FLAGccf7228a7 [2021-05-06 07:53:44,761 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9dc7d912f/daed80ad627644d78f435ffb52be57c2 [2021-05-06 07:53:44,763 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 07:53:44,765 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 07:53:44,769 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 07:53:44,769 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 07:53:44,773 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 07:53:44,774 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:53:44" (1/1) ... [2021-05-06 07:53:44,774 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d0affa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:53:44, skipping insertion in model container [2021-05-06 07:53:44,774 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:53:44" (1/1) ... [2021-05-06 07:53:44,779 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 07:53:44,792 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 07:53:44,915 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/divbin_unwindbound10.i[958,971] [2021-05-06 07:53:44,939 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:53:44,945 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 07:53:44,995 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/divbin_unwindbound10.i[958,971] [2021-05-06 07:53:45,011 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:53:45,021 INFO L208 MainTranslator]: Completed translation [2021-05-06 07:53:45,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:53:45 WrapperNode [2021-05-06 07:53:45,021 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 07:53:45,022 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 07:53:45,022 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 07:53:45,022 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 07:53:45,033 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:53:45" (1/1) ... [2021-05-06 07:53:45,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:53:45" (1/1) ... [2021-05-06 07:53:45,038 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:53:45" (1/1) ... [2021-05-06 07:53:45,038 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:53:45" (1/1) ... [2021-05-06 07:53:45,049 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:53:45" (1/1) ... [2021-05-06 07:53:45,053 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:53:45" (1/1) ... [2021-05-06 07:53:45,057 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:53:45" (1/1) ... [2021-05-06 07:53:45,062 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 07:53:45,063 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 07:53:45,063 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 07:53:45,063 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 07:53:45,064 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:53:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 07:53:45,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 07:53:45,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 07:53:45,144 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 07:53:45,144 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 07:53:45,144 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 07:53:45,144 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 07:53:45,144 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 07:53:45,145 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 07:53:45,145 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-06 07:53:45,145 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-06 07:53:45,145 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 07:53:45,145 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 07:53:45,145 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 07:53:45,146 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 07:53:45,146 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 07:53:45,147 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 07:53:45,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 07:53:45,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 07:53:45,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 07:53:45,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 07:53:45,148 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 07:53:45,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 07:53:45,377 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 07:53:45,383 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 07:53:45,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:53:45 BoogieIcfgContainer [2021-05-06 07:53:45,385 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 07:53:45,385 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 07:53:45,386 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 07:53:45,386 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 07:53:45,388 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:53:45" (1/1) ... [2021-05-06 07:53:45,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:53:45 BasicIcfg [2021-05-06 07:53:45,410 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 07:53:45,411 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 07:53:45,411 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 07:53:45,413 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 07:53:45,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 07:53:44" (1/4) ... [2021-05-06 07:53:45,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5938bd4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:53:45, skipping insertion in model container [2021-05-06 07:53:45,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:53:45" (2/4) ... [2021-05-06 07:53:45,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5938bd4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:53:45, skipping insertion in model container [2021-05-06 07:53:45,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:53:45" (3/4) ... [2021-05-06 07:53:45,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5938bd4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:53:45, skipping insertion in model container [2021-05-06 07:53:45,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:53:45" (4/4) ... [2021-05-06 07:53:45,415 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound10.iJordan [2021-05-06 07:53:45,429 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 07:53:45,434 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 07:53:45,446 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 07:53:45,466 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 07:53:45,466 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 07:53:45,467 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 07:53:45,467 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 07:53:45,467 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 07:53:45,467 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 07:53:45,467 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 07:53:45,467 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 07:53:45,481 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 07:53:45,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 07:53:45,487 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:53:45,488 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:53:45,488 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:53:45,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:53:45,492 INFO L82 PathProgramCache]: Analyzing trace with hash 35225450, now seen corresponding path program 1 times [2021-05-06 07:53:45,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:53:45,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124545592] [2021-05-06 07:53:45,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:53:45,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:53:45,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 07:53:45,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:53:45,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 07:53:45,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:53:45,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 07:53:45,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:53:45,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:53:45,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:53:45,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124545592] [2021-05-06 07:53:45,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124545592] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:53:45,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:53:45,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 07:53:45,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222656715] [2021-05-06 07:53:45,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 07:53:45,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:53:45,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 07:53:45,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:53:45,769 INFO L87 Difference]: Start difference. First operand has 33 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:53:45,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:53:45,856 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2021-05-06 07:53:45,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 07:53:45,858 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 07:53:45,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:53:45,863 INFO L225 Difference]: With dead ends: 34 [2021-05-06 07:53:45,864 INFO L226 Difference]: Without dead ends: 29 [2021-05-06 07:53:45,865 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:53:45,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-06 07:53:45,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-05-06 07:53:45,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 07:53:45,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-05-06 07:53:45,890 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 23 [2021-05-06 07:53:45,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:53:45,890 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-05-06 07:53:45,890 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:53:45,891 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-05-06 07:53:45,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-06 07:53:45,892 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:53:45,892 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:53:45,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 07:53:45,892 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:53:45,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:53:45,893 INFO L82 PathProgramCache]: Analyzing trace with hash 106385839, now seen corresponding path program 1 times [2021-05-06 07:53:45,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:53:45,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436065718] [2021-05-06 07:53:45,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:53:45,907 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:53:45,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [490274931] [2021-05-06 07:53:45,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:53:45,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:53:45,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 07:53:45,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:53:46,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:53:46,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:53:46,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:53:46,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:53:46,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:53:46,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:53:46,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:53:46,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436065718] [2021-05-06 07:53:46,084 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:53:46,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490274931] [2021-05-06 07:53:46,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490274931] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:53:46,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:53:46,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 07:53:46,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481736762] [2021-05-06 07:53:46,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 07:53:46,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:53:46,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 07:53:46,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 07:53:46,086 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:53:46,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:53:46,095 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2021-05-06 07:53:46,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 07:53:46,096 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2021-05-06 07:53:46,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:53:46,096 INFO L225 Difference]: With dead ends: 30 [2021-05-06 07:53:46,096 INFO L226 Difference]: Without dead ends: 30 [2021-05-06 07:53:46,097 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 07:53:46,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-06 07:53:46,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-06 07:53:46,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 07:53:46,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-05-06 07:53:46,100 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 25 [2021-05-06 07:53:46,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:53:46,101 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-05-06 07:53:46,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:53:46,101 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-05-06 07:53:46,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-06 07:53:46,102 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:53:46,102 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:53:46,309 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 07:53:46,309 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:53:46,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:53:46,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1662084126, now seen corresponding path program 1 times [2021-05-06 07:53:46,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:53:46,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580675926] [2021-05-06 07:53:46,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:53:46,322 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:53:46,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2107511819] [2021-05-06 07:53:46,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:53:46,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:53:46,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 07:53:46,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:53:46,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:53:46,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:53:46,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:53:46,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:53:46,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:53:46,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:53:46,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:53:46,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:53:46,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:53:46,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:53:46,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580675926] [2021-05-06 07:53:46,456 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:53:46,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107511819] [2021-05-06 07:53:46,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107511819] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:53:46,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:53:46,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 07:53:46,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102499459] [2021-05-06 07:53:46,457 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:53:46,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:53:46,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:53:46,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:53:46,457 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:53:46,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:53:46,483 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2021-05-06 07:53:46,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 07:53:46,483 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-05-06 07:53:46,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:53:46,484 INFO L225 Difference]: With dead ends: 34 [2021-05-06 07:53:46,484 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 07:53:46,484 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 8.7ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:53:46,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 07:53:46,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-05-06 07:53:46,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 07:53:46,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2021-05-06 07:53:46,487 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 26 [2021-05-06 07:53:46,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:53:46,487 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2021-05-06 07:53:46,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:53:46,488 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2021-05-06 07:53:46,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-06 07:53:46,488 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:53:46,488 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:53:46,705 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:53:46,706 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:53:46,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:53:46,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1663216184, now seen corresponding path program 1 times [2021-05-06 07:53:46,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:53:46,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243735104] [2021-05-06 07:53:46,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:53:46,717 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:53:46,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [699217917] [2021-05-06 07:53:46,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:53:46,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:53:46,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 07:53:46,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:53:46,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:53:46,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:53:46,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:53:46,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:53:46,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:53:46,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 07:53:46,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:53:46,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243735104] [2021-05-06 07:53:46,938 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:53:46,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699217917] [2021-05-06 07:53:46,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699217917] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:53:46,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:53:46,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 07:53:46,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658709391] [2021-05-06 07:53:46,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 07:53:46,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:53:46,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 07:53:46,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 07:53:46,940 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:53:53,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:53:53,520 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2021-05-06 07:53:53,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 07:53:53,521 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-05-06 07:53:53,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:53:53,522 INFO L225 Difference]: With dead ends: 40 [2021-05-06 07:53:53,522 INFO L226 Difference]: Without dead ends: 39 [2021-05-06 07:53:53,522 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 83.2ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 07:53:53,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-06 07:53:53,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-06 07:53:53,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 07:53:53,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2021-05-06 07:53:53,526 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 26 [2021-05-06 07:53:53,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:53:53,526 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2021-05-06 07:53:53,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:53:53,526 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2021-05-06 07:53:53,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 07:53:53,527 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:53:53,527 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:53:53,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:53:53,741 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:53:53,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:53:53,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1664227005, now seen corresponding path program 1 times [2021-05-06 07:53:53,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:53:53,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114611054] [2021-05-06 07:53:53,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:53:53,751 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:53:53,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [682486455] [2021-05-06 07:53:53,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:53:53,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:53:53,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 07:53:53,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:53:53,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:53:53,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:53:53,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:53:53,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:53:53,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:53:53,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:53:53,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:53:53,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:53:53,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:53:53,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:53:53,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114611054] [2021-05-06 07:53:53,927 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:53:53,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682486455] [2021-05-06 07:53:53,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682486455] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:53:53,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:53:53,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 07:53:53,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131994659] [2021-05-06 07:53:53,928 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:53:53,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:53:53,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:53:53,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:53:53,928 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:53:53,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:53:53,962 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2021-05-06 07:53:53,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:53:53,963 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-05-06 07:53:53,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:53:53,963 INFO L225 Difference]: With dead ends: 41 [2021-05-06 07:53:53,964 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 07:53:53,964 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:53:53,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 07:53:53,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-05-06 07:53:53,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 30 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 07:53:53,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2021-05-06 07:53:53,967 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 28 [2021-05-06 07:53:53,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:53:53,967 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2021-05-06 07:53:53,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:53:53,967 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2021-05-06 07:53:53,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 07:53:53,968 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:53:53,968 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:53:54,174 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:53:54,177 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:53:54,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:53:54,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1687306486, now seen corresponding path program 1 times [2021-05-06 07:53:54,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:53:54,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286145536] [2021-05-06 07:53:54,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:53:54,196 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:53:54,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1607199000] [2021-05-06 07:53:54,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:53:54,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:53:54,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 07:53:54,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:53:54,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:53:54,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:53:54,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:53:54,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:53:54,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:53:54,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:53:54,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:53:54,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:53:54,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:53:54,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:53:54,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:53:54,336 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:53:54,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:53:54,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286145536] [2021-05-06 07:53:54,337 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:53:54,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607199000] [2021-05-06 07:53:54,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607199000] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:53:54,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:53:54,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 07:53:54,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565950539] [2021-05-06 07:53:54,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:53:54,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:53:54,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:53:54,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:53:54,338 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:53:54,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:53:54,381 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2021-05-06 07:53:54,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 07:53:54,382 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-06 07:53:54,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:53:54,382 INFO L225 Difference]: With dead ends: 46 [2021-05-06 07:53:54,382 INFO L226 Difference]: Without dead ends: 46 [2021-05-06 07:53:54,383 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 25.0ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:53:54,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-06 07:53:54,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-05-06 07:53:54,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 34 states have internal predecessors, (42), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 07:53:54,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2021-05-06 07:53:54,386 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 29 [2021-05-06 07:53:54,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:53:54,386 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2021-05-06 07:53:54,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:53:54,386 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2021-05-06 07:53:54,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 07:53:54,386 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:53:54,387 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:53:54,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 07:53:54,600 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:53:54,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:53:54,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1686174428, now seen corresponding path program 1 times [2021-05-06 07:53:54,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:53:54,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999207511] [2021-05-06 07:53:54,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:53:54,609 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:53:54,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [855938089] [2021-05-06 07:53:54,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:53:54,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:53:54,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 07:53:54,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:53:54,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:53:54,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:53:54,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:53:54,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:53:54,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:53:54,890 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 07:53:54,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:53:54,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999207511] [2021-05-06 07:53:54,890 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:53:54,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855938089] [2021-05-06 07:53:54,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855938089] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:53:54,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:53:54,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 07:53:54,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357166049] [2021-05-06 07:53:54,891 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 07:53:54,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:53:54,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 07:53:54,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 07:53:54,892 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 07:54:01,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:54:01,625 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2021-05-06 07:54:01,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 07:54:01,626 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2021-05-06 07:54:01,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:54:01,627 INFO L225 Difference]: With dead ends: 63 [2021-05-06 07:54:01,627 INFO L226 Difference]: Without dead ends: 60 [2021-05-06 07:54:01,627 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 188.4ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-05-06 07:54:01,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-06 07:54:01,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 53. [2021-05-06 07:54:01,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 40 states have internal predecessors, (48), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 07:54:01,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2021-05-06 07:54:01,630 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 29 [2021-05-06 07:54:01,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:54:01,630 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2021-05-06 07:54:01,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 07:54:01,631 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2021-05-06 07:54:01,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-06 07:54:01,631 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:54:01,631 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-06 07:54:01,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:54:01,832 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:54:01,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:54:01,833 INFO L82 PathProgramCache]: Analyzing trace with hash -665062919, now seen corresponding path program 1 times [2021-05-06 07:54:01,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:54:01,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125687959] [2021-05-06 07:54:01,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:54:01,840 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:54:01,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [824661942] [2021-05-06 07:54:01,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:54:01,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:54:01,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-06 07:54:01,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:54:01,929 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:54:01,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:54:01,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125687959] [2021-05-06 07:54:01,929 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:54:01,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824661942] [2021-05-06 07:54:01,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824661942] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:54:01,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:54:01,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 07:54:01,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342192799] [2021-05-06 07:54:01,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 07:54:01,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:54:01,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 07:54:01,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:54:01,931 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 07:54:01,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:54:01,947 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2021-05-06 07:54:01,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 07:54:01,948 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2021-05-06 07:54:01,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:54:01,948 INFO L225 Difference]: With dead ends: 50 [2021-05-06 07:54:01,948 INFO L226 Difference]: Without dead ends: 42 [2021-05-06 07:54:01,949 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:54:01,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-06 07:54:01,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-05-06 07:54:01,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 31 states have internal predecessors, (37), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 07:54:01,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2021-05-06 07:54:01,953 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 35 [2021-05-06 07:54:01,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:54:01,953 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2021-05-06 07:54:01,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 07:54:01,954 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2021-05-06 07:54:01,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 07:54:01,954 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:54:01,954 INFO L523 BasicCegarLoop]: trace histogram [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, 1] [2021-05-06 07:54:02,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:54:02,157 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:54:02,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:54:02,158 INFO L82 PathProgramCache]: Analyzing trace with hash 402759474, now seen corresponding path program 1 times [2021-05-06 07:54:02,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:54:02,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045595436] [2021-05-06 07:54:02,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:54:02,177 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:54:02,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2049390068] [2021-05-06 07:54:02,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:54:02,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:54:02,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 07:54:02,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:54:02,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:54:02,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:54:02,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:54:02,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:54:02,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:54:02,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:54:02,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:54:02,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:54:02,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:54:02,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:54:02,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:54:02,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:54:02,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:54:02,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:54:02,312 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:54:02,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:54:02,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045595436] [2021-05-06 07:54:02,312 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:54:02,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049390068] [2021-05-06 07:54:02,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049390068] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:54:02,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:54:02,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 07:54:02,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446988056] [2021-05-06 07:54:02,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 07:54:02,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:54:02,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 07:54:02,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:54:02,314 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 07:54:02,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:54:02,358 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2021-05-06 07:54:02,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 07:54:02,358 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2021-05-06 07:54:02,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:54:02,359 INFO L225 Difference]: With dead ends: 60 [2021-05-06 07:54:02,359 INFO L226 Difference]: Without dead ends: 60 [2021-05-06 07:54:02,359 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 27.4ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:54:02,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-06 07:54:02,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2021-05-06 07:54:02,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 40 states have (on average 1.225) internal successors, (49), 41 states have internal predecessors, (49), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 07:54:02,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2021-05-06 07:54:02,362 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 38 [2021-05-06 07:54:02,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:54:02,362 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2021-05-06 07:54:02,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 07:54:02,362 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2021-05-06 07:54:02,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 07:54:02,363 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:54:02,363 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-06 07:54:02,579 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 07:54:02,580 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:54:02,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:54:02,580 INFO L82 PathProgramCache]: Analyzing trace with hash 403891532, now seen corresponding path program 1 times [2021-05-06 07:54:02,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:54:02,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130865250] [2021-05-06 07:54:02,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:54:02,602 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:54:02,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1839727283] [2021-05-06 07:54:02,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true