/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_valuebound5.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:15:37,821 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:15:37,823 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:15:37,866 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:15:37,867 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:15:37,867 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:15:37,868 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:15:37,870 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:15:37,871 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:15:37,872 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:15:37,872 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:15:37,882 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2021-05-02 20:15:37,904 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:15:37,905 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:15:37,906 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:15:37,907 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:15:37,915 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:15:37,915 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:15:37,917 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:15:37,917 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:15:37,917 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:15:37,917 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:15:37,917 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:15:37,918 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:15:37,918 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:15:37,918 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:15:37,918 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:15:37,918 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:15:37,918 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:15:37,919 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:15:37,919 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:15:37,919 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:15:37,919 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:15:37,919 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:15:37,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:15:37,920 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:15:37,920 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:15:37,921 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:15:37,921 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:15:38,182 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:15:38,206 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:15:38,208 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:15:38,209 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:15:38,209 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:15:38,210 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin_valuebound5.i [2021-05-02 20:15:38,279 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f7ede25b/e08b00e2224c4d259f62f6ccf777777f/FLAG30e25a902 [2021-05-02 20:15:38,650 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:15:38,651 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_valuebound5.i [2021-05-02 20:15:38,656 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f7ede25b/e08b00e2224c4d259f62f6ccf777777f/FLAG30e25a902 [2021-05-02 20:15:39,040 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f7ede25b/e08b00e2224c4d259f62f6ccf777777f [2021-05-02 20:15:39,042 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:15:39,044 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:15:39,046 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:15:39,046 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:15:39,049 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:15:39,049 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:15:39" (1/1) ... [2021-05-02 20:15:39,050 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17f3c2e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:15:39, skipping insertion in model container [2021-05-02 20:15:39,050 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:15:39" (1/1) ... [2021-05-02 20:15:39,055 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:15:39,067 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:15:39,165 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_valuebound5.i[958,971] [2021-05-02 20:15:39,176 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:15:39,183 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:15:39,198 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_valuebound5.i[958,971] [2021-05-02 20:15:39,217 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:15:39,227 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:15:39,228 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:15:39 WrapperNode [2021-05-02 20:15:39,228 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:15:39,235 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:15:39,235 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:15:39,235 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:15:39,290 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:15:39" (1/1) ... [2021-05-02 20:15:39,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:15:39" (1/1) ... [2021-05-02 20:15:39,305 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:15:39" (1/1) ... [2021-05-02 20:15:39,305 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:15:39" (1/1) ... [2021-05-02 20:15:39,320 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:15:39" (1/1) ... [2021-05-02 20:15:39,324 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:15:39" (1/1) ... [2021-05-02 20:15:39,326 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:15:39" (1/1) ... [2021-05-02 20:15:39,327 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:15:39,334 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:15:39,334 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:15:39,335 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:15:39,336 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:15:39" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:15:39,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:15:39,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:15:39,400 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:15:39,400 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:15:39,400 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:15:39,401 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:15:39,401 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:15:39,401 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:15:39,401 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 20:15:39,401 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 20:15:39,401 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:15:39,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:15:39,401 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 20:15:39,402 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:15:39,402 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:15:39,402 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:15:39,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:15:39,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:15:39,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:15:39,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:15:39,403 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:15:39,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:15:39,629 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:15:39,629 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 20:15:39,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:15:39 BoogieIcfgContainer [2021-05-02 20:15:39,631 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:15:39,631 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:15:39,631 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:15:39,632 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:15:39,633 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:15:39" (1/1) ... [2021-05-02 20:15:39,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:15:39 BasicIcfg [2021-05-02 20:15:39,669 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:15:39,670 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:15:39,670 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:15:39,673 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:15:39,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:15:39" (1/4) ... [2021-05-02 20:15:39,673 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@142a79c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:15:39, skipping insertion in model container [2021-05-02 20:15:39,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:15:39" (2/4) ... [2021-05-02 20:15:39,677 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@142a79c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:15:39, skipping insertion in model container [2021-05-02 20:15:39,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:15:39" (3/4) ... [2021-05-02 20:15:39,677 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@142a79c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:15:39, skipping insertion in model container [2021-05-02 20:15:39,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:15:39" (4/4) ... [2021-05-02 20:15:39,678 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_valuebound5.iJordan [2021-05-02 20:15:39,683 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:15:39,687 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:15:39,732 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:15:39,768 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:15:39,768 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:15:39,768 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:15:39,768 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:15:39,768 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:15:39,768 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:15:39,768 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:15:39,769 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:15:39,796 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:15:39,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 20:15:39,804 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:15:39,804 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:15:39,805 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:15:39,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:15:39,817 INFO L82 PathProgramCache]: Analyzing trace with hash -402483300, now seen corresponding path program 1 times [2021-05-02 20:15:39,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:15:39,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705001088] [2021-05-02 20:15:39,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:15:39,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:15:40,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:15:40,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:15:40,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:15:40,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:15:40,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:15:40,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:15:40,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:15:40,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:15:40,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 20:15:40,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:15:40,035 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 20:15:40,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:15:40,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705001088] [2021-05-02 20:15:40,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705001088] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:15:40,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:15:40,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:15:40,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395065357] [2021-05-02 20:15:40,040 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:15:40,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:15:40,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:15:40,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:15:40,050 INFO L87 Difference]: Start difference. First operand has 34 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:15:40,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:15:40,102 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2021-05-02 20:15:40,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:15:40,104 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-02 20:15:40,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:15:40,109 INFO L225 Difference]: With dead ends: 34 [2021-05-02 20:15:40,109 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 20:15:40,110 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:15:40,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 20:15:40,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-02 20:15:40,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:15:40,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-05-02 20:15:40,169 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 34 [2021-05-02 20:15:40,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:15:40,169 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-05-02 20:15:40,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:15:40,170 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-05-02 20:15:40,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 20:15:40,175 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:15:40,175 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:15:40,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:15:40,176 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:15:40,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:15:40,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1131459816, now seen corresponding path program 1 times [2021-05-02 20:15:40,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:15:40,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082288454] [2021-05-02 20:15:40,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:15:40,214 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:15:40,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [376672757] [2021-05-02 20:15:40,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:15:40,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:15:40,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 20:15:40,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:15:40,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:40,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:40,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:40,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:40,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:40,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:40,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:40,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:40,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:40,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:40,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:40,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:40,595 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:15:40,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:15:40,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082288454] [2021-05-02 20:15:40,596 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:15:40,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376672757] [2021-05-02 20:15:40,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376672757] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:15:40,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:15:40,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:15:40,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526367960] [2021-05-02 20:15:40,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:15:40,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:15:40,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:15:40,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:15:40,598 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:15:40,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:15:40,751 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2021-05-02 20:15:40,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:15:40,751 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 35 [2021-05-02 20:15:40,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:15:40,753 INFO L225 Difference]: With dead ends: 42 [2021-05-02 20:15:40,753 INFO L226 Difference]: Without dead ends: 41 [2021-05-02 20:15:40,754 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 109.6ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:15:40,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-02 20:15:40,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2021-05-02 20:15:40,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.24) internal successors, (31), 26 states have internal predecessors, (31), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 20:15:40,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2021-05-02 20:15:40,759 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 35 [2021-05-02 20:15:40,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:15:40,760 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2021-05-02 20:15:40,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:15:40,760 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2021-05-02 20:15:40,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 20:15:40,761 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:15:40,761 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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 20:15:40,977 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 20:15:40,977 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:15:40,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:15:40,978 INFO L82 PathProgramCache]: Analyzing trace with hash -305154333, now seen corresponding path program 1 times [2021-05-02 20:15:40,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:15:40,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066187329] [2021-05-02 20:15:40,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:15:40,994 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:15:40,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [831186138] [2021-05-02 20:15:40,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:15:41,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:15:41,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 20:15:41,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:15:41,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:41,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:41,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:41,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:41,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:41,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:41,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:41,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:41,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:41,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:41,256 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:15:41,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:15:41,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066187329] [2021-05-02 20:15:41,256 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:15:41,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831186138] [2021-05-02 20:15:41,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831186138] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:15:41,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:15:41,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:15:41,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149301072] [2021-05-02 20:15:41,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:15:41,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:15:41,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:15:41,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:15:41,258 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:15:41,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:15:41,418 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2021-05-02 20:15:41,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:15:41,419 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2021-05-02 20:15:41,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:15:41,420 INFO L225 Difference]: With dead ends: 55 [2021-05-02 20:15:41,420 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 20:15:41,420 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 108.2ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:15:41,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 20:15:41,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2021-05-02 20:15:41,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 20:15:41,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2021-05-02 20:15:41,424 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 37 [2021-05-02 20:15:41,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:15:41,424 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2021-05-02 20:15:41,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:15:41,424 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2021-05-02 20:15:41,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 20:15:41,425 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:15:41,425 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1] [2021-05-02 20:15:41,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:15:41,630 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:15:41,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:15:41,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1858557484, now seen corresponding path program 1 times [2021-05-02 20:15:41,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:15:41,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669052608] [2021-05-02 20:15:41,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:15:41,640 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:15:41,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [907377815] [2021-05-02 20:15:41,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:15:41,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:15:41,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-02 20:15:41,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:15:41,761 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 20:15:41,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:15:41,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669052608] [2021-05-02 20:15:41,762 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:15:41,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907377815] [2021-05-02 20:15:41,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907377815] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:15:41,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:15:41,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:15:41,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354635080] [2021-05-02 20:15:41,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:15:41,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:15:41,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:15:41,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:15:41,764 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 20:15:41,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:15:41,776 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2021-05-02 20:15:41,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:15:41,776 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2021-05-02 20:15:41,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:15:41,777 INFO L225 Difference]: With dead ends: 42 [2021-05-02 20:15:41,777 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 20:15:41,777 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:15:41,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 20:15:41,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-02 20:15:41,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.2) internal successors, (30), 26 states have internal predecessors, (30), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 20:15:41,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2021-05-02 20:15:41,781 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 43 [2021-05-02 20:15:41,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:15:41,782 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2021-05-02 20:15:41,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 20:15:41,782 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2021-05-02 20:15:41,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 20:15:41,783 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:15:41,783 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1] [2021-05-02 20:15:42,005 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:15:42,005 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:15:42,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:15:42,006 INFO L82 PathProgramCache]: Analyzing trace with hash 270500047, now seen corresponding path program 1 times [2021-05-02 20:15:42,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:15:42,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081191619] [2021-05-02 20:15:42,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:15:42,017 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:15:42,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [764928883] [2021-05-02 20:15:42,017 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 [2021-05-02 20:15:42,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:15:42,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 20:15:42,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:15:42,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:42,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:42,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:42,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:42,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:42,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:42,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:42,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:42,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:42,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:42,209 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-05-02 20:15:42,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:15:42,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081191619] [2021-05-02 20:15:42,209 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:15:42,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764928883] [2021-05-02 20:15:42,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764928883] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:15:42,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:15:42,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:15:42,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466165511] [2021-05-02 20:15:42,210 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:15:42,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:15:42,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:15:42,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:15:42,211 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 20:15:42,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:15:42,305 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2021-05-02 20:15:42,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:15:42,306 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 45 [2021-05-02 20:15:42,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:15:42,306 INFO L225 Difference]: With dead ends: 47 [2021-05-02 20:15:42,306 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 20:15:42,307 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 45.5ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:15:42,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 20:15:42,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-02 20:15:42,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 31 states have internal predecessors, (35), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:15:42,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-05-02 20:15:42,311 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 45 [2021-05-02 20:15:42,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:15:42,311 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-05-02 20:15:42,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 20:15:42,312 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-05-02 20:15:42,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-02 20:15:42,312 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:15:42,313 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1] [2021-05-02 20:15:42,535 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:15:42,535 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:15:42,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:15:42,536 INFO L82 PathProgramCache]: Analyzing trace with hash -575889733, now seen corresponding path program 2 times [2021-05-02 20:15:42,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:15:42,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693253879] [2021-05-02 20:15:42,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:15:42,548 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:15:42,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [74546502] [2021-05-02 20:15:42,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:15:42,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:15:42,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:15:42,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 20:15:42,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:15:42,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:42,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:42,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:42,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:42,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:42,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:42,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:42,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:43,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:43,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:44,067 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 26 [2021-05-02 20:15:44,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:44,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:44,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:50,483 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:15:50,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:15:50,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693253879] [2021-05-02 20:15:50,483 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:15:50,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74546502] [2021-05-02 20:15:50,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74546502] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:15:50,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:15:50,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:15:50,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602943550] [2021-05-02 20:15:50,484 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:15:50,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:15:50,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:15:50,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:15:50,485 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:15:51,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:15:51,160 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2021-05-02 20:15:51,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:15:51,161 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 53 [2021-05-02 20:15:51,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:15:51,163 INFO L225 Difference]: With dead ends: 55 [2021-05-02 20:15:51,163 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 20:15:51,163 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1412.0ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:15:51,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 20:15:51,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-05-02 20:15:51,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 32 states have (on average 1.15625) internal successors, (37), 33 states have internal predecessors, (37), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:15:51,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2021-05-02 20:15:51,167 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 53 [2021-05-02 20:15:51,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:15:51,167 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2021-05-02 20:15:51,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:15:51,167 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2021-05-02 20:15:51,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 20:15:51,168 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:15:51,168 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 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, 1] [2021-05-02 20:15:51,369 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 20:15:51,369 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:15:51,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:15:51,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1631897610, now seen corresponding path program 3 times [2021-05-02 20:15:51,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:15:51,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577012958] [2021-05-02 20:15:51,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:15:51,383 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:15:51,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [457735888] [2021-05-02 20:15:51,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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