/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/ps3-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 22:06:27,070 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 22:06:27,072 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 22:06:27,104 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 22:06:27,105 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 22:06:27,109 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 22:06:27,113 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 22:06:27,119 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 22:06:27,120 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 22:06:27,121 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 22:06:27,125 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 22:06:27,126 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 22:06:27,126 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 22:06:27,127 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 22:06:27,128 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 22:06:27,128 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 22:06:27,129 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 22:06:27,130 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 22:06:27,131 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 22:06:27,140 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 22:06:27,144 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 22:06:27,149 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 22:06:27,149 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 22:06:27,150 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 22:06:27,152 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 22:06:27,159 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 22:06:27,163 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 22:06:27,165 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 22:06:27,170 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 22:06:27,180 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 22:06:27,180 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 22:06:27,181 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 22:06:27,181 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 22:06:27,181 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 22:06:27,182 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 22:06:27,182 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 22:06:27,182 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 22:06:27,182 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 22:06:27,182 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 22:06:27,182 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 22:06:27,182 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 22:06:27,183 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 22:06:27,183 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 22:06:27,183 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 22:06:27,183 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 22:06:27,183 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 22:06:27,183 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 22:06:27,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 22:06:27,184 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 22:06:27,184 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 22:06:27,184 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 22:06:27,185 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 22:06:27,472 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 22:06:27,490 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 22:06:27,492 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 22:06:27,493 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 22:06:27,494 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 22:06:27,495 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps3-ll_unwindbound100.c [2021-05-02 22:06:27,557 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36bbac4b7/8c058e74a5e141ff8f8c0f105b9fd40e/FLAGceb6f188d [2021-05-02 22:06:28,013 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 22:06:28,013 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps3-ll_unwindbound100.c [2021-05-02 22:06:28,019 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36bbac4b7/8c058e74a5e141ff8f8c0f105b9fd40e/FLAGceb6f188d [2021-05-02 22:06:28,045 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36bbac4b7/8c058e74a5e141ff8f8c0f105b9fd40e [2021-05-02 22:06:28,051 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 22:06:28,055 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 22:06:28,057 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 22:06:28,057 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 22:06:28,061 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 22:06:28,062 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:06:28" (1/1) ... [2021-05-02 22:06:28,063 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@230dd98d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:06:28, skipping insertion in model container [2021-05-02 22:06:28,063 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:06:28" (1/1) ... [2021-05-02 22:06:28,069 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 22:06:28,082 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 22:06:28,235 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/ps3-ll_unwindbound100.c[458,471] [2021-05-02 22:06:28,251 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:06:28,258 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 22:06:28,270 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/ps3-ll_unwindbound100.c[458,471] [2021-05-02 22:06:28,279 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:06:28,315 INFO L208 MainTranslator]: Completed translation [2021-05-02 22:06:28,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:06:28 WrapperNode [2021-05-02 22:06:28,316 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 22:06:28,318 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 22:06:28,318 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 22:06:28,318 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 22:06:28,327 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:06:28" (1/1) ... [2021-05-02 22:06:28,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:06:28" (1/1) ... [2021-05-02 22:06:28,334 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:06:28" (1/1) ... [2021-05-02 22:06:28,334 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:06:28" (1/1) ... [2021-05-02 22:06:28,345 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:06:28" (1/1) ... [2021-05-02 22:06:28,368 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:06:28" (1/1) ... [2021-05-02 22:06:28,370 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:06:28" (1/1) ... [2021-05-02 22:06:28,378 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 22:06:28,379 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 22:06:28,380 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 22:06:28,380 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 22:06:28,381 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:06:28" (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 22:06:28,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 22:06:28,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 22:06:28,459 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 22:06:28,459 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 22:06:28,459 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 22:06:28,459 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 22:06:28,459 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 22:06:28,460 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 22:06:28,460 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 22:06:28,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 22:06:28,460 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-02 22:06:28,461 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 22:06:28,461 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 22:06:28,461 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 22:06:28,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 22:06:28,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 22:06:28,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 22:06:28,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 22:06:28,462 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 22:06:28,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 22:06:28,702 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 22:06:28,703 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 22:06:28,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:06:28 BoogieIcfgContainer [2021-05-02 22:06:28,704 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 22:06:28,705 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 22:06:28,705 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 22:06:28,705 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 22:06:28,708 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:06:28" (1/1) ... [2021-05-02 22:06:28,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:06:28 BasicIcfg [2021-05-02 22:06:28,729 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 22:06:28,731 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 22:06:28,731 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 22:06:28,733 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 22:06:28,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 10:06:28" (1/4) ... [2021-05-02 22:06:28,737 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ba0d3b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:06:28, skipping insertion in model container [2021-05-02 22:06:28,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:06:28" (2/4) ... [2021-05-02 22:06:28,738 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ba0d3b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:06:28, skipping insertion in model container [2021-05-02 22:06:28,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:06:28" (3/4) ... [2021-05-02 22:06:28,738 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ba0d3b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 10:06:28, skipping insertion in model container [2021-05-02 22:06:28,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:06:28" (4/4) ... [2021-05-02 22:06:28,739 INFO L111 eAbstractionObserver]: Analyzing ICFG ps3-ll_unwindbound100.cJordan [2021-05-02 22:06:28,743 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 22:06:28,762 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 22:06:28,776 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 22:06:28,790 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 22:06:28,790 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 22:06:28,790 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 22:06:28,790 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 22:06:28,790 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 22:06:28,790 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 22:06:28,791 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 22:06:28,791 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 22:06:28,817 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 22:06:28,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 22:06:28,829 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:06:28,830 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:06:28,830 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:06:28,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:06:28,845 INFO L82 PathProgramCache]: Analyzing trace with hash -630084848, now seen corresponding path program 1 times [2021-05-02 22:06:28,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:06:28,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411651825] [2021-05-02 22:06:28,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:06:28,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:06:29,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 22:06:29,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:06:29,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:06:29,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:06:29,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411651825] [2021-05-02 22:06:29,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411651825] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:06:29,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:06:29,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 22:06:29,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956959062] [2021-05-02 22:06:29,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 22:06:29,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:06:29,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 22:06:29,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:06:29,142 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 22:06:29,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:06:29,199 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2021-05-02 22:06:29,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 22:06:29,200 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 22:06:29,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:06:29,207 INFO L225 Difference]: With dead ends: 23 [2021-05-02 22:06:29,207 INFO L226 Difference]: Without dead ends: 18 [2021-05-02 22:06:29,208 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 56.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:06:29,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-02 22:06:29,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-05-02 22:06:29,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 22:06:29,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-02 22:06:29,235 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-05-02 22:06:29,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:06:29,236 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-02 22:06:29,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 22:06:29,236 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-02 22:06:29,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 22:06:29,237 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:06:29,237 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:06:29,237 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 22:06:29,237 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:06:29,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:06:29,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1971636769, now seen corresponding path program 1 times [2021-05-02 22:06:29,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:06:29,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057570390] [2021-05-02 22:06:29,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:06:29,266 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:06:29,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2108805202] [2021-05-02 22:06:29,267 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 22:06:29,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:06:29,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 22:06:29,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:06:29,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:06:29,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:06:29,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:06:29,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:06:29,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:06:29,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:06:29,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:06:29,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057570390] [2021-05-02 22:06:29,488 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:06:29,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108805202] [2021-05-02 22:06:29,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108805202] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:06:29,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:06:29,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 22:06:29,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533237343] [2021-05-02 22:06:29,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 22:06:29,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:06:29,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 22:06:29,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 22:06:29,493 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 22:06:29,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:06:29,505 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2021-05-02 22:06:29,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 22:06:29,506 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 22:06:29,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:06:29,508 INFO L225 Difference]: With dead ends: 19 [2021-05-02 22:06:29,508 INFO L226 Difference]: Without dead ends: 19 [2021-05-02 22:06:29,508 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 22:06:29,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-02 22:06:29,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-02 22:06:29,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 22:06:29,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-05-02 22:06:29,519 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-05-02 22:06:29,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:06:29,520 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-05-02 22:06:29,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 22:06:29,520 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-05-02 22:06:29,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 22:06:29,521 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:06:29,527 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:06:29,741 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 22:06:29,741 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:06:29,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:06:29,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1972709245, now seen corresponding path program 1 times [2021-05-02 22:06:29,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:06:29,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452627793] [2021-05-02 22:06:29,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:06:29,751 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:06:29,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2109009683] [2021-05-02 22:06:29,752 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 22:06:29,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:06:29,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 22:06:29,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:06:29,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:06:29,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:06:29,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452627793] [2021-05-02 22:06:29,895 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:06:29,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109009683] [2021-05-02 22:06:29,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109009683] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:06:29,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:06:29,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 22:06:29,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093201034] [2021-05-02 22:06:29,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 22:06:29,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:06:29,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 22:06:29,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 22:06:29,896 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 22:06:29,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:06:29,923 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-05-02 22:06:29,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 22:06:29,924 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 22:06:29,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:06:29,925 INFO L225 Difference]: With dead ends: 26 [2021-05-02 22:06:29,925 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 22:06:29,925 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:06:29,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 22:06:29,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-02 22:06:29,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 22:06:29,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-05-02 22:06:29,929 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2021-05-02 22:06:29,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:06:29,929 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-05-02 22:06:29,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 22:06:29,929 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-05-02 22:06:29,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 22:06:29,930 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:06:29,930 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:06:30,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:06:30,143 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:06:30,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:06:30,144 INFO L82 PathProgramCache]: Analyzing trace with hash -832305310, now seen corresponding path program 1 times [2021-05-02 22:06:30,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:06:30,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139894348] [2021-05-02 22:06:30,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:06:30,153 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:06:30,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1406763179] [2021-05-02 22:06:30,154 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 22:06:30,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:06:30,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 22:06:30,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:06:30,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:06:30,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:06:30,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:06:30,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:06:30,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:06:30,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:06:30,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:06:30,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:06:30,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:06:30,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:06:30,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139894348] [2021-05-02 22:06:30,351 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:06:30,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406763179] [2021-05-02 22:06:30,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406763179] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:06:30,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:06:30,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 22:06:30,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170252278] [2021-05-02 22:06:30,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 22:06:30,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:06:30,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 22:06:30,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 22:06:30,353 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 22:06:30,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:06:30,386 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2021-05-02 22:06:30,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 22:06:30,387 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 22:06:30,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:06:30,387 INFO L225 Difference]: With dead ends: 27 [2021-05-02 22:06:30,387 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 22:06:30,388 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:06:30,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 22:06:30,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 22:06:30,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 22:06:30,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-05-02 22:06:30,391 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 20 [2021-05-02 22:06:30,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:06:30,392 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-05-02 22:06:30,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 22:06:30,392 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-05-02 22:06:30,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 22:06:30,392 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:06:30,392 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:06:30,614 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:06:30,615 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:06:30,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:06:30,615 INFO L82 PathProgramCache]: Analyzing trace with hash -831232834, now seen corresponding path program 1 times [2021-05-02 22:06:30,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:06:30,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252933024] [2021-05-02 22:06:30,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:06:30,624 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:06:30,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [710126336] [2021-05-02 22:06:30,624 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 22:06:30,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:06:30,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 22:06:30,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:06:30,784 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:06:30,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:06:30,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252933024] [2021-05-02 22:06:30,784 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:06:30,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710126336] [2021-05-02 22:06:30,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710126336] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:06:30,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:06:30,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 22:06:30,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258493919] [2021-05-02 22:06:30,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 22:06:30,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:06:30,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 22:06:30,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:06:30,786 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 22:06:30,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:06:30,851 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-05-02 22:06:30,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:06:30,851 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 22:06:30,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:06:30,852 INFO L225 Difference]: With dead ends: 34 [2021-05-02 22:06:30,852 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 22:06:30,853 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 54.2ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:06:30,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 22:06:30,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-02 22:06:30,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 22:06:30,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-05-02 22:06:30,857 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 20 [2021-05-02 22:06:30,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:06:30,857 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-05-02 22:06:30,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 22:06:30,857 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-05-02 22:06:30,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 22:06:30,858 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:06:30,858 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:06:31,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:06:31,073 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:06:31,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:06:31,073 INFO L82 PathProgramCache]: Analyzing trace with hash -870943837, now seen corresponding path program 2 times [2021-05-02 22:06:31,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:06:31,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744427358] [2021-05-02 22:06:31,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:06:31,082 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:06:31,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [441637351] [2021-05-02 22:06:31,082 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 22:06:31,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:06:31,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:06:31,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 22:06:31,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:06:31,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:06:31,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:06:31,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:06:31,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:06:31,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:06:31,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:06:31,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:06:31,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:06:31,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:06:31,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:06:31,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:06:31,225 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:06:31,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:06:31,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744427358] [2021-05-02 22:06:31,225 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:06:31,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441637351] [2021-05-02 22:06:31,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441637351] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:06:31,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:06:31,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 22:06:31,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909422807] [2021-05-02 22:06:31,226 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 22:06:31,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:06:31,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 22:06:31,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:06:31,227 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 22:06:31,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:06:31,264 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2021-05-02 22:06:31,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:06:31,265 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-02 22:06:31,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:06:31,266 INFO L225 Difference]: With dead ends: 35 [2021-05-02 22:06:31,266 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 22:06:31,266 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 26.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:06:31,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 22:06:31,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 22:06:31,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 22:06:31,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-05-02 22:06:31,270 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 28 [2021-05-02 22:06:31,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:06:31,270 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-05-02 22:06:31,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 22:06:31,271 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-05-02 22:06:31,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 22:06:31,271 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:06:31,271 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:06:31,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 22:06:31,494 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:06:31,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:06:31,494 INFO L82 PathProgramCache]: Analyzing trace with hash -869871361, now seen corresponding path program 2 times [2021-05-02 22:06:31,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:06:31,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55372603] [2021-05-02 22:06:31,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:06:31,503 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:06:31,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [849507401] [2021-05-02 22:06:31,503 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 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 [2021-05-02 22:06:31,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:06:31,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:06:31,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 22:06:31,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:06:31,772 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 22:06:31,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:06:31,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55372603] [2021-05-02 22:06:31,772 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:06:31,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849507401] [2021-05-02 22:06:31,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849507401] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:06:31,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:06:31,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 22:06:31,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488122648] [2021-05-02 22:06:31,773 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 22:06:31,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:06:31,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 22:06:31,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:06:31,774 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 22:06:31,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:06:31,865 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2021-05-02 22:06:31,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 22:06:31,865 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-02 22:06:31,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:06:31,866 INFO L225 Difference]: With dead ends: 42 [2021-05-02 22:06:31,866 INFO L226 Difference]: Without dead ends: 41 [2021-05-02 22:06:31,867 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 96.1ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-02 22:06:31,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-02 22:06:31,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-05-02 22:06:31,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 22:06:31,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2021-05-02 22:06:31,872 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 28 [2021-05-02 22:06:31,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:06:31,872 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2021-05-02 22:06:31,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 22:06:31,873 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2021-05-02 22:06:31,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 22:06:31,873 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:06:31,873 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:06:32,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:06:32,077 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:06:32,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:06:32,077 INFO L82 PathProgramCache]: Analyzing trace with hash 2080181988, now seen corresponding path program 3 times [2021-05-02 22:06:32,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:06:32,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293990333] [2021-05-02 22:06:32,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:06:32,099 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:06:32,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [287439121] [2021-05-02 22:06:32,099 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 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